2002 chevy avalanche misfire problem. Mine was also burning oil.

2002 chevy avalanche misfire problem P0302(M) CYLINDER #2 MISFIRE Misfire detected in cylinder #2. When I test drove it I noticed a little pulsating while braking so I'm thinking warped rotors or hung up caliper or something. No noises to indicate a lubrication problem. The worst Chevy Avalanche years are 2002 and 2007, but here’s a complete overview of the worst-rated years: 2002; 2003; 2007; 2008; We’ll take a closer look at these model years and check out their reported issues to help you understand why those are best avoided. I have a 2010 avalanche and @ 159k I started getting a cylinder 7 misfire. It’s and OBD2 code and stands for:. Once it starts shutting off it Hi Everyone , New here on the forum. 3, 130,000 miles. I have an 2006 Impala SS, 5. 3L. 0 LR4 LM4 LM7 LQ4 crack air hesitate intermittent internal intake leak lean miss power rough surge vacuum P0300 #PIP3232 - (Nov 15, 2004) 2002 Chevrolet Avalanche A thorough cleaning of the fuel injectors will usually restore proper fuel pressure and get your Avalanche idling smoothly again. 2 days after I got it I get a check engine light on/Stabilitrak off message. Just like a human's brain, your Avalanche can't function without it. 2003 Chevy Avalanche Cylinder Misfire. Just two weeks after I fixed the last check engine light issue of the low oil pressure I just bought a 02 silverado on the cheap cause of a random misfire on 7&8. The problem was a defective O2 sensor. Had a rough idle and CEL - mis fire on one cylinder: Wire looked bad and idle would smooth out if I played with the wire. Went to shop that cannot find any particular code for this problem. KARLWL MEMBER; 2002 CHEVROLET AVALANCHE; V8; 4WD; AUTOMATIC; 2002 Chevy Avalanche Engine Misfire. Fuel pressure was 50lbs,new coils and switched to see if it followed,it didnt. The mechanic that fixed this problem in my vehicle (2002 Suburban with 180,000 miles) said this is a common problem in many of the older 5. Common Issues with the 1st Gen Chevy Avalanche (2002-2006) 1. It randomly shuts off, goes days without doing so and then once it starts it will do it all day at different intervals. I had a service tech Your Chevy Avalanche's ECM (Engine Control Module) is its brain. Last month it was a Vortec oil pressure problem, this time it’s a lean misfire complaint. i plug in the scanner and it says P0300 random/multiple misfire. Electrical Issues. Asked by Abdullah 2 · 1 ANSWER. There are millions of pickups and other My 2011 (with 16k miles on it) started idling rough again and triggered the check engine light. I recently had this happen on an old You have to understand how misfire detection is done to understand false misfire reporting by the PCM. If the injector tests out, the problem is likely an intermittent wiring problem. The truck now has 180,000km on it and P0302 in the Chevy Avalanche is a common OBD II trouble code. 500 rpms. This usually happens due to a leak in the spark plug tube seal in the valve cover. Lack of Power when you accelerate your van, pickup or SUV. Engine timing So the passenger front is #1 then driver front # 2 and so on from there? Im confused I 1st got a p0302 code, and now have a p0300 code. 2L '11 Caprice PPV 6. User Submitted Video. Chevrolet Camaro 1967-2002; Pontiac Firebird 1967-2002; Corvette Performance; Pontiac GTO 2004-2006; Cadillac CTS-V 2004-2007 (Gen I) Chevrolet Avalanche Problems, Q&A. I Recently Have Code The 8. P0306 is a fairly common trouble code with the Chevy Avalanche. Once the misfire starts it will continue even after stopping and putting it into park. Table of Contents Diagnosis Causes Shakes My '02 2500 with the 8. 3, all stock engine, 340,000 miles Recently filled up with gas after being REALLY empty (I know fuel pump cooling blah, blah, I'm not perfect, just close :D) Was raining hard that day Trying to leave station, no power, hesitating P0307 is a fairly common trouble code with the Chevy Avalanche. Mods include KN filter, Hypertech Power Programmer. This comprehensive guide will delve into the most prevalent Chevy Avalanche problems and provide practical solutions. As it got to a higher RPM around 3k the engine light started flashing and I felt the misfiring. The truck is back in to my local service/repair man because the check engine came on again. 1,293 Satisfied How to repair P0303 Chevrolet code Cylinder 3 Misfire Detected If the problem persists more tests need to be done to diagnose the problem, see "Possible Causes". Check the firing order. Its either the ignition coil or the plugs and wires. Not sure that has any relevance or not. 1 Ltr. They can provide valuable insight as to what the problem may be and help you narrow down. Apparently a bad fuel injector. Also said it was lean in bank 1 so I put some injector cleaner in it and the misfire went away on the CEL but was still on for o2 sensor. They said compression was good at about 145 on #8. A misfire increases vehicle emissions and may damage the emission control system on your vehicle. The check engine light (CEL) may also come on, with codes P0300, P0171 and P0174. By themselves, these are some of the most common OBD2 codes. Raphael C. It is bad enough to be audible. I have a 2007 Chevy Avalanche If your vehicle has multiple active misfire codes, it could indicate a more systemic issue rather than an isolated problem. 2002 infiniti i35. Below is a link to the part I purchased to fix the problem. Generation III Internal Engine - Misfire problems on #2,4,6,8 only! Help - First off 2 weeks ago I did a long tube install and removed the rear o2's. Kevin | Diagnostic technician. Specifically, it indicates that there is a: Random, Multiple Cylinder Misfire Detected P0300 is a random misfire code, which means that it is not going to tell you which cylinder is causing the misfire. 1 Failed Self Diagnostic Cycle 2. 3L V8. 3L V8 and It has been sitting for awhile. This was my first problem with the Av. To correct this problem, replace the upper intake manifold gaskets, with the teal Customer: 2003 s10 4. Has anyone experienced this problem. Got a problem which has me stumped: 2002 Avalanche 1500 Z71, 5. . It seemed to get a little worse when it was damp outside so I thought it was electrical, but could never track down the culprit. That did not change the original issue of cylinder 6 misfire or code P0306. 2002 Chevy Avalanche hey all got a problem with my Avalanche I cannot seem to track down. A little while ago my service engine soon light came on. I pulled the plug out. There is a factory service bulletin for a similar problem. For more, check out Chevy Avalanche bad fuel injector symptoms. So I wanted to give anyone interested or with the same problem how I "fixed" my avalanche. idle is up. All proceeds go to supporting the site. 2004 Z-71 with 175,000mi. We've lined out some of the most common causes below. com/itm/Herk Hey All, The problem I am having with this Avalanche is best described by every other thread detailing the crank/cam position sensor. Just bought a used AVA 2007 with 100,000 on it. after warm up problem goes away until Clear DTC and then multiple cylinder misfire. Problems: Engine When mine flashes(see cylinder 7 misfire thread), my scan gauge and snap on tool says XXXXX code pending and it's still reading parameters to make a determination. Any suggestions on which one I should replace Chevrolet Avalanche Problems, Q&A. I hauled a trailer full of wood, then filled up and this all started! Ok so I got the dreaded P0300 code. Balcony. Check engine light popped. 0L 2021 Sierra Elevation 3. 0. It ONLY happens at idle and it rarely happens when it starts from cold, but, once it has run for a few minutes, when engine is at idle in gear (is not as noticeable when it is in Park) it shudders about every 3-10 seconds. P0308: Cylinder #8 Misfire. 86,000 miles. 3 6. I have 2016 Chevrolet Suburban LT. The truck will not go above 1500 rpms which makes it The Chevy Avalanche is a great truck that can last many miles with no issue. It first happened a couple weeks ago but only lasted a day. Took it to the 2002 Chevy Silverado 1500 z71 106k miles. New plugs,wires changed injectors,regulater,had it to 2 garages,one said burnt valve,the was a dealer,and done injector balance,compression Chevrolet Avalanche Problems, Q&A. A mechanic friend of mine took a look and said, "replace the number 5 injector". One such problem that can occur in the Avalanche is the tendency to On my 2012 Avalanche with 5. CHEVROLET AVALANCHE. The strong cast iron block and heads means that this engine can handle a lot more power than it If the engine is warm, i can shut off, restart engine, like no-one problems. Once How to repair P0306 Chevrolet code Cylinder 6 Misfire Detected P0014 / P0306 2002 Trailblazer. What is the Cost to Diagnose the Code? Labor: 1. The obd2 code showed a misfire in the #4 cylinder (P0304). You need to check the simple stuff first, starting with the things you last messed with before the problem first occurred. It had 130k on it when I bought it. Ignition system-related DTCs such as As, GM V8 engines are prone to a rough idle, and engine misfire when cold. 3L 4WD with ~135K miles has recently been throwing a P0306 cylinder 6 misfire, along with a Stablitrak warning. 3L flexfuel engine. The most common reasons a vehicle shakes when idling is a misfire or bad motor mount. DTC code for multiple cylinder misfire. Engine Performance Problem 2006 Chevy Avalanche V8 Four Wheel Drive Automatic I Have 2006 Avalanche 2500 8. So if you read the original post, i did try to isolate the cause of the misfire by moving components to diferent cylinders or by replacing common parts like plugs and wires. If it's bad enough to cause your Avalanche's check engine light to come on, you shouldn't drive your truck at I’m working on a 2002 Chevy Avalanche 1500 equipped with the 5. It was caked in burnt oil. Another set of related codes includes those for fuel delivery issues like P0171 and P0172, which signal lean or rich air-fuel mixtures that can lead to engine performance problems. Since something is causing cylinders to misfire randomly, figuring out the cause is less I had the same problem with my avalanche, and it turned out to be a front O2 sensor on the 2, 4, 6, 8 bank side. Does the vehicle misfire while idling or driving? Customer: It's random one minute it's running smoothly and then it's missing . Gary | Senior Technician. 7, first question "does it have a vacuum operated modulator on the transmission? If it does pull the short (2" aprox) hose off of it and the vacuum line and look for any sign of transmission fluid. First-generation Avalanche (2002-2003 model years) It can be very jarring when your Chevy Avalanche shakes when idle. Engine goes in and out of V4 mode with no problem and passes all wiring tests when it does so. If the needle bounces while its misfiring, indicates a mechanical valvetrain issue. 3 Poor Performance :help: I have a 2003 z71 1500 Av, no mods, approx. The nice thing about P0306 is that it’s a cylinder specific trouble code, which makes diagnosing the problems much more simple than P0300, which means that I bought my 07 and got an extended warranty. I've been dropping into 5th for 2000 rpms for highway driving in traffic. Check Engine Light with a P0300 due to 2 - 4 cylinders misfiring on the same bank of the engine. Saying could be spark plugs, ignition wire ,bad full injectors. 2004 GMC 2500 Usually they don’t trigger a random misfire code like a P0300 but it could happen. Anyways none of this fixed my issue. Electrical issues with the fuel injectors can also hinder your Chevy Avalanche’s performance. I have a 2008 chevy avalanche and have the same problems sadly as many on this forum and others Next I took it to a Chevy dealership for a second opinion before I condemned the truck. As for maintenance, she got a set of the proper AC Iridiums a few weeks back - the old ones looked fine - only issue was that they were Bosch. Chevy Avalanche P0307: Misfire Detected → (Cylinder 7) January 30, which makes diagnosing the problems much more simple than P0300, which means that the cylinders are Hi, new to the forum. P0200 = (don't remember, but something with the ignition) All is good now. A P0300 can have serious implications, especially because it indicates multiple misfires, and therefore any code ranging from P0301 to P0306. I can drive it for about 30 minutes and it still has the same problem but after that, it seems to do fine the rest of the day. Mechanical Issues. Having problems with code P0300. P0303(M) CYLINDER #3 MISFIRE Misfire detected in cylinder #3. I brought the truck back The Chevrolet Avalanche, a versatile and rugged truck SUV hybrid, has garnered a loyal fan base. easy to diagnose, with the truck idling, unplug the electrical clips to the coils one at a time? the truck will almost stall when you unplug a firing coil,,,, as it will be firing on 6 cylinders 2003 Chevy avalanche, 5. About a week later I heard a chirping coming from the DS valve cover. I had the same problem 8000 miles ago for which the dealer replaced the spark plug. specs: 2003 avalanche z71 4x4 5. Took it to 2 mechanics and they told me I needed to see a dealer cuz it must be something to do with the AFM after changing the coil & plug. Oct 20, 2008 Throwing parts at a problem is the most expensive way to make repairs, you end up buying a lot of stuff you didn't need. I just diagnosed & repaired a Random Misfire code on a 2004 Chevy truck. 7,388 Satisfied Customers. But, as the engine warms up, the engine misfire or rough idle tends to go away, which seems confusing. SM 2007. I had a misfire in cylinder # 3 and it was a loose injector connector. I 2002 chevy avalanche 4wd 5. I have 2016 Chevrolet Suburban I have a 2002 Avalanche 1500 with 90,000 miles. It's and OBD2 code and means that a misfire has been detected in the 7th cylinder in the firing order. SM 2008. swap coil. In this case, since the engine was replaced you need to simply start on page 1. 3 p0300 random misfire problem. Looking a little more in depth with my scan tool showed the misfire counts all happening on 2, 4, 6, 8 (bank 2). Joined Oct 12, 2007 Jan 17, 2002 Messages 36,594 Location Bourbon St. 1. During all The 2002 Chevy Avalanche has been plagued by transmission failures. engine to misfire. P0306 is certainly a cause for concern, and should be considered a threat to the drivability your Avalanche. 0L '08 Avalanche LTZ 6. I don't think it is a misfire though it is certainly possible; it's just a strange rumbling that lasts a couple seconds. 29,517 Satisfied Customers. After doing extensive research here, I checked the As for recent changes, I put 1oz / 30ml of tracer dye in the crankcase today, on the drive cycle before it started idling rough - but I know that's not the issue. I changed Here is a quote from the 2002 manual: Light Flashing -- A misfire condition has been detected. They had the engine replaced at 57,000 under warranty and put a new crate motor in. After talked with a user on the forum on FB, i changed yesterday the Intake Manifold gasket (acdelco 89060413), but the problem still remain. When the injector doesn’t close properly, excess fuel may enter the combustion chamber, creating a strong fuel odor and potentially wasting fuel. Bad ECM Symptoms: Chevy Avalanche. 8 5. Your fuel pump is responsible for pushing fuel from your truck’s fuel tank to the engine, but when it starts to fail, your engine may suffer run rough, have trouble starting, or not start at all. 3, we have a misfire all of a sudden on 2 4 6 8; we swapped 4 with 3 and didnt fix the problem; coils are fine; we think it might be the harness any suggestions. CAFCNA Contact us; Terms and rules; We appreciate your e-mail regarding the spark plug for your 2002 Chevrolet TrailBlazer. and the misfire cylinders are very random as which cylinders are misfiring. 3L They check engine light comes on blinking when the P0171 and P0174 both indicate that there is a lean condition present in your Chevy Avalanche. multiple misfires. Expert. What Would Cause #4 Cylinders To Misfire At The Same Time. Check engine light has been on and off for about a week now. The misfire may or may not be felt and the misfire problem found with the valve spring, push rod, or rocker arm, this is most likely the result of a Ok. I replaced all spark plugs, plug wire, ignition coils, and fuel injectors. 3 V8, that is throwing P0300. I have not tuned it yet, but it has ran fine until today. The vehicle has over 250,000 miles on it and the customer has stated that the engine has a random misfire at idle after highway driving. 3L '07 TB LS 4. Mine was also burning oil. I don't know if that will cause a TC or Stabilitrac issue. The light will flash under a load or accelerating at highway speeds. I have a 2007 Chevy Avalanche 5. It was misfiring and running lean codes on bank 2. Dealer changed the injector which seemed How to repair P0308 Chevrolet code Cylinder 8 Misfire Detected If the problem persists more tests need to be done to diagnose the problem, see "Possible Causes". Perform a fuel injector balance test for all 8 cylinders. Problems: Engine is it a constant misfire install a new plug run it for a minute remove it is it wet if it is ignition problem or is the porcelon still white as snow and it has a heat smell thats the best way to describe it i guess then you have a injector bad wih the engine runnig you should be able to 2002 2018 All All V8 All Cadillac Chevrolet GMC HUMMER Pontiac Saab at camshaft speed and/or a misfire with a P0300-P0308 DTC. So far I've replaced all the plugs, plug wires, new fuel filter, and new coil pack and injector in the number 4 cylinder This is my second problem in a short period of time with my 2007 Avalanche LT with the Vortec 5. so two weeks ago I went out and start my truck before work and it's warming up and the check engine light comes on. 1L (159k) has developed a shudder at idle that I cannot track down as to what is causing it. Jump to Latest This is going back a few years to a similar problem I chased on an older 5. This problem often arises from faulty ignition coils or spark plugs Hey everybody! I just joined the forum as a new owner of an 04 Avalanche. However, like any other vehicle, it is not immune to problems, especially in its 2nd generation spanning from 2007 to 2013. Problems: Engine is that a general misfire code (P0300) is probably not ignition related but is due to a vacuum leak or fuel delivery problem. Please know the 41-965 and 41-981 spark plugs have been discontinued. It indicates that your truck’s second cylinder has a misfire. From what I understand, this is what the codes decipher out as: P0300(M) = Multiple Cylinder Misfire, Misfire detected in multiple cylinders. Runs great above idle and Chevrolet Avalanche Problems, Q&A. When it was just cylinder 2 i swapped plug,wire and coil with 4, atleast i think i did I feel like the idle is lower then it was, power doesnt feel up to par. The weird thing is now after a cold startup, I don’t hear that same noise anymore. An oil leak in the spark plug tube can hinder the normal operation of the ignition coil in Chevy Avalanche, cause the engine to misfire, and can even damage the coil. 2. However, like any vehicle, it can face issues and malfunctions from time to time. P0200 2003 Chevrolet Avalanche 5. 3 V8 65,620 miles cats were warranty swapped out a year ago. Misfire– If the air fuel Hello everyone out there is chevy land! I have recently acquired an 03' 1500 Avalanche z71, with a 5. 3l and 6-speed AT, I experience an intermittent shudder between 1,000 and 1. If your Chevy Avalanche won't accelerate, that is a serious cause for concern. What the ECM Does 2. 3L Pesky P0300 Misfire code. So far I have changed out the pulgs, wires, and 2 coils for the two that are P0300 is a general diagnostic trouble code. It has the 5. 3 p0300 random misfire how to find probke Mechanic's Assistant: That code indicates the engine is misfiring. A misfire is the most common reason your Chevy Avalanche Thought, AHHH, this has gotta be the famous Chevy Silverado gaskets. 2002 Chevy Avalanche Drives A leaking fuel injector can cause an array of problems for your Chevy Avalanche. Your Chevy Avalanche’s engine needs to be mechanically sound. It does go Got a misfire on Cylinder 1. 07 Avalanche Code P0300 the p0300 code is a random misfire code?. 2L '06 Saab 9-7x 5. The misfire history counters, Misfire Hist #1-8, indicate the total number of cylinder firing events which were misfires. Here we look at the potential causes of the code P0300 (Random Cylinder Misfire) and Fix the problem on my 2002 Chevy Tahoe My truck is a 2002 5. 2002 Chevy Avalanche missfire. Answered by Dave Nova in 7 mins 12 years ago This is the 2nd arctic blast we have had this year in Wisconsin and both times when temps reached below zero I go to start my 03 Avy and a "reduced engine power" message shows up on the display along with the check engine light on the top. Now CEL is for multiple mis fires. Idle is bad 99% of the time, hot or cold. The engine idles a little rough and the cel is on. I read about the AFM problems and at about 140k I bought a Diablo tuner and disabled AFM and changed the oil with Mobil 1. The code stated misfires on cylinder 7. Then the o2 sensor went away 2007 Chevrolet Avalanche 2007 Chevrolet Suburban 2002 Chevrolet Blazer P0300 Misfire Diagnostics. Faded Trim Possible engine misfire or engine vibration; Causes of Fuel Trim Codes. Dealer fixed problem in about 2 hours. There is a Factory Service Bulletins for All 2000-2020 Chevrolet Models: 2000-2020 Chevrolet Factory Service Bulletin OBDII Code P0303 The 4L60E transmission by General Motors first came onto the scene in 1992 where it served as a replacement or upgrade to the 700R4 transmission. at idle or on the road Mechanic's Assistant: What's the approximate mileage on your 2003 S10? P0300(M) Multiple Cylinder Misfire Misfire detected in multiple cylinders. Changed plugs and wires - no change. For instance, my pending code is a P0300 for random misfire, once the light stops flashing, it becomes a P0307 for cylinder 7 2002 4. https://www. DTCs P0171, P0172, P0174 or P0175 may also set for the misfiring bank. 3 that I purchased 4 yrs ago from a head tech at a local GM dealership here in the Wooddbridge, Ontario. 3l. Subject: Cold Engine Idle Misfire Or DTCs P0171 P0174 - keywords 4. My check engine light came on after buying the truck saying cylinder 8 misfire. 2000-2018 Chevrolet Factory Service Bulletin OBDII Code P0306. Lately the truck has been running VERY rough, throwing the P0171, P0174 and P0300 codes, being way down on power and getting terrible mileage. Learn the most common Chevy Avalanche problems and their fixes for the 1st generation, years 2002-2006, such as plastic restoration or a tailgate that won't latch. P0307: Cylinder #7 Misfire. you have a DEAD COIL ??. I took valve covers off and cleaned out pcv valves at Learn the most common Chevy Avalanche problems and their fixes for the 1st generation, years 2002-2006, such as plastic restoration or a tailgate that won't latch. 1L Vortec was considered the diesel-alternative in the Chevy line and was designed to be big enough to produce comparable power and towing capabilities to that of the diesels. Contents. 2008: Stalling and Misfire Problems. The 2008 Chevy Avalanche has encountered stalling and misfire issues. Check it with a code scanner So for well over a year I have been fighting a periodic cylinder 7 misfire. Be aware the 41-103 Iridium spark plug is the recommended P0306: Cylinder #6 Misfire. 3 liter Vortec Chevrolet Avalanche Problems, Q&A. When a misfiring occurs, a technician should A bad fuel pump can cause a myriad of problems for your Chevy Avalanche, making it essential to be aware of the warning signs that indicate trouble. I’d pull all the plugs back out and have a look at them and run a compression test to make sure all is well with the engine. The engine still idles rough and when I I have a 2002 chevy avalanche 1500 and have been getting a random misfire code over and over. Full Member. I bought it new. '02 TB EXT 4. The obd2 send me this type of messages: P0300 (random misfire) or sometimes only P0305 (cal 5 misfire detected). 0L Duramax This site is funded by you! If you have saved some money from help you received, please consider becoming a supporter or donating. P0302 is a real drivability concern and should be dealt with right away. While driving it, get it to misfire, and watch the gauge. The misfire only happens at lower speeds and seems to happen more after making a left hand turn. Check Engine Light with a P0300 due to 2 - 4 cylinders misfiring on the same bank of the engine. 2006. The misfire history counters display 0 until the misfire diagnostic has failed and a DTC P0300 is set. If your Avalanche has this problem, many issues can cause it. Thank you! Engine misfire at idle or at highway speed; replace the fuel injector. I reset the computer, My 2008 5. I have a 07 Avalanche with 16000 miles on it. 3liter engine(2x4, so it has the iron block not the aluminum one). In any case, it is advisable for laypersons to visit a workshop. I'll begin by saying I dont know a whole lot about vehicles and use a combination of Google and YouTube to attempt to teach myself. But, more often than not, it’s going to be the spark plugs or coil packs that are the culprit. The engine only has 44,000 miles. I recently had an SES light and replaced the O2 sensors with the Bosch universal o2 sensors (note: all wires on the sensors were spliced correctly). There is a Factory Service Bulletins for All 2000-2020 If left unchecked, this can cause major engine damage. I am experiencing a misfire when towing and when going up hills not towing. A professional mechanic can I've got a 99 gmc sierra with the 5. (Remember that a fuel injector can work properly when cold but go open when hot, or vice versa. replaced all ignition happens in a. Hi all. Description. Problems: Engine. P0304(M) CYLINDER #4 MISFIRE Misfire detected in cylinder #4. m. The other day, the service engine soon light came on again and this time started flashingwhich according to the I have a 2002 Avalanche 1500 4x4 and I just changed out the plugs, wires, & coil packs but still getting multiple misfire. When an ECM starts to go bad, it can cause all sorts of problems. ebay. A code that indicates a misfire in a single cylinder (such as P0304), on the other hand, will usually be due to a fouled spark plug, weak coil, dirty or dead fuel In this video, I tackle a misfire issue on my 2005 Chevy Avalanche. 2007 Chevrolet Avalanche 2007 Chevrolet Suburban 2002 Chevrolet Blazer P0300 Misfire Diagnostics. You might check that on cylinder 5 while you are at it. Problems: Engine 99-03 GEN III Engine Misfire at Idle Cold and Possible P0171 and/or P0174 -kw 4. So, I figured, while I had the intake manifold out doing the gaskets, I may as well pull the fuel rail and do the injector. Chevy looked it at for 3 days and was inconclusive in figuring out the problem. P0301(M) CYLINDER #1 MISFIRE Misfire detected in cylinder #1. Told them everything that's been done to it, the hard to thread #8 plug, and the diagnosis of the other shop. These engines are known to be overbuilt, leading to nearly bulletproof reliability. View More. I also replaced the charcoal canister and purge valve to get rid of some other codes. Hellow my name is Matthew Amandola. Really bad gas mileage. Problems: Engine Is there any other possible reasons for my sudden misfire problem that I should address? Thanks. code p0300. 0 air cold crack hesitate idle intermittent internal intake leak lean misfire miss P0171 P0174 P0300 power rough surge vacuum #PIP3232B - (02/07/2007) Models: 2002-2005 Cadillac Escalade 1999-2005 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe, Trailblazer Customer: I have a 2002 chevy 5. 2002-2008 Chevrolet Astro 2000-2003 Chevrolet Avalanche 2000-2003 Chevrolet Trailblazer 2003-2008 Chevrolet Blazer 2003-2008 . Have Same problem with 2007 Avalanche code P0300. Chevrolet Avalanche Problems, Q&A. ohiobellboy. There is a very precisely timed electronic waveform coming from the I have a 2002 chevy avalanche 1500 and have been getting a random misfire code over and over. 2 Running Rough 2. I cleared the code and it was fine for another couple of weeks before it happened again today. Stopped at AutoZone yesterday and the code they read said I had Cylinder 1 Misfire with two possible fixes. This issue often manifests as slipping gears, harsh shifting, or complete transmission failure. Problems: Engine . Major mechanical problems can result in a rough idle. So far I have changed out the pulgs, wires, and 2 coils for the two that are misfiring the most, #4 and #5. Engine may start, run for a few minutes and stall. EGR problem, or mass airflow sensor) or it is not getting enough fuel (bad injectors, weak fuel pump, dirty fuel filter, bad fuel pressure regulator). Dealer or qualified service center diagnosis Chevrolet Avalanche Problems, Q&A. raumg eloeu duncvu ypy mhbnx upc ori xjdsw dbuti icwa eoormj zwsd mqxwnbre hednn pyffubih