1 d
2004 chevy cavalier misfire?
Follow
11
2004 chevy cavalier misfire?
March 31st, 2024 10:27 AM by ewr 6,960. P0304 is certainly a cause for concern, and should be considered a threat to the drivability your Tahoe. Here's the symptoms) Rough idle for a few minutes, ranges from 800-1250 rpm for approximately 2 minutes) Smell of gasoline around the tail pipe and the fuel rail) Loss of power when accelerating (pressing the accelerator over 1/4 through any gear. 1 Answer. Advertisement The Chevrolet Nova wa. Dashboard Dash Cover Flannel Dash Mat Custom Compatible with 1995-2005 Chevrolet Cavalier, Anti-Glare, Anti-Reflection, No Peculiar Smell $2091. Intermittent Misfire fixed! I had posted about my 2006 Canyon 2. - Answered by a verified Chevy Mechanic I have a cavalier that has a rough idle,stalls at stops,and runs very [. 2- check the fire timing by looking for every wire in the right place. How does your service work? 110k, it is a consistent - Answered by a verified Chevy Mechanic Why will my 1. Cavalier chevy diagram engine 2001 system cooling 2000 wiringWiring diagrams and free manual ebooks: 1997-2000 chevrolet cavalier 2 Need wiring diagram for 2000 chevy cavalier 4-doorDiagram engine chevy cavalier line 2004 brake diesel 2000 wiring relay side cherolet fuse resources digital compartment. Tech Notes. Few things are as annoying as turning the key in your truck and finding it will not start. Miracles don't just happen on 34th Street. 0 p0300 random misfire. 2 liter 4 cyl Automatic for about 5 or 6 years now. Part Number: WKP9212047 Guaranteed to Fit. When the idle is really rough, the power seems to fade in and out a bit. 2004 silverado 5. Aug 29, 2018 · P0303 OBD II Code Causes: Chevy Cavalier A fouled iridium plug vs Here are the most common P0303 Chevy Cavalier causes; they are presented somewhat in order from most to least likely to be causing the code in your car: Bad Spark Plugs– A fouled spark plug is the most common cause of P0303. simply swap there location and see if the misfire follows the coil pack. Causes A code P0136 may mean that one or more of the following has happened: 2000 Chevrolet Cavalier 2dr Coupe. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. 4'th Cylinder. All times are GMT -5. GM shared the news this morning, and released the first images of the upcoming electric Chevrolet Corvette. Jul 21, 2022 · The P0303 code means that cylinder 3 is misfiring or is randomly misfiring. P0304 is certainly a cause for concern, and should be considered a threat to the drivability your Suburban. Suspect an ignition-related cause or a vacuum leak. Fuel - The ideal air-to-fuel ratio is 14. 6L Four Cylinder Engine (VIN 6 - RPO L91) I own a 2002 chevy cavalier and my "Check "Gauges" light is on. Lately at red lights I've noticed the feeling of a slight misfire that goes away when the RPMS go over 1000 or so 2004 Cavalier LS clone 2003 Saturn L200 Fully loaded-Sold 1987 Toyota Celica. Come join the discussion about Silverados, Sierras, and other. Helping you find the best gutter guard companies for the job. Used Chevrolet Cavalier By City. Jan 7, 2024 · Cavalier headlight2004 chevy cavalier engine wiring diagram 2004 chevy cavalier wiring diagramWiring diagram for 2000 chevy cavalier headlights. dan123456789 on November 21st, 2021. No check engine light associated with problem. Smelled gas in oil, confirmed flooding probably, still has flashing check engine light, with no. 2L 4 cylinder equipped Chevrolet Cavalier, or Pontiac Sunfire, or Chevrolet Sonoma, or GMC Sonoma. 2 is a marvelous engine, its powerful, quiet and as reliable as an anvil, a testament to its foreign. It runs fine at speed. My scan tool shows the misfires are limited to cylinders 2 & 3 and the misfires are. I replaced the plugs and wire extension boots. , making the testing methods shown very valuabl. Tech Notes. P0304 is a cylinder-specific misfire code, meaning only your Cavalier’s fourth cylinder has a misfire. This code indicates that your car's engine is misfiring and can be a drivability threat. A misfiring cylinder causes slight variations in the rotational speed of the crankshaft. cannot find a vacuum leak but manifold vac is below 10". Code po300 on computer. This recent issue actually started with a P0307 (misfire on cylinder 7). 2/17/2020 Sold the car in 2017. If it was just cylinder 2 or 3, the code would be 0302 or 0303. 6L Four Cylinder Engine (VIN 6 - RPO L91) I own a 2002 chevy cavalier and my "Check "Gauges" light is on. Look at the electrodes and see if they. i own a 2005 chevy colorado z71 ls about 2 months ago i took the ride to a chevy dealer about a week later i gett a call that they found. 4'th Cylinder. Check the Vacuum Line: Detach the vacuum line from the regulator and inspect it for cracks or damage. Cavalier - Cavalier - The ultimate forum for latest news, discussions, how-to guides, and technical help on the Chevy Cavalier. 2004 chevrolet cavalier ls sport sedan 2. Summary posted 7/18/2004 Related Documents & Media 1989 Chevrolet Cavalier Z24. On "V" configuration engines, it'll usually be the second cylinder on the head further away from the front of the engine. 6. If yours is an older Chevy truck, it might be less of a problem and more of an unnecess. after driving there is a hot. 2L The car has 140000 miles, has been well maintained. It shows that the onboard heater circuit isn't operating normally on the downstream oxygen sensor from bank 1. Before you can even diagnose P0304 in your car, you need to find the fourth cylinder's location. On "V" configuration engines, it'll usually be the second cylinder on the head further away from the front of the engine. Summary posted 7/18/2004 Related Documents & Media 1989 Chevrolet Cavalier Z24. The P0304 code means that cylinder 4 is misfiring or is randomly misfiring. One or more misfire codes (P0300-P0304) will be stored in your car's PCM memory. 4 pushing out a P0300 code for multible misfire. If it determines the ignition module has caused a problem with the system, it will turn on the check engine light Random misfire code p0300 2 Answers. The P0301 code means that cylinder 1 is misfiring or is randomly misfiring. I have 2004 Suburban 5 Getting a misfire on #2 cylinder. It stands for: P0304: Misfire Detected → Cylinder 4. It streamlines the manufacturing and troubleshooting aspects of electronic modules by housing the modules into one, central unit instead of each function having its own device. - The injector circuit is open or shorted at cylinder #1. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 4. A failed coil pack or worn spark plug can also trigger the code. The nice thing about P0304 is that it's a cylinder specific trouble code, which makes diagnosing the problems simpler than P0300, which means that the cylinders are randomly. You have to find the cause of p0304. 2 P0300 random/multiple misfire code. The Powertrain Control Module handles a lot of functions in your car. Indices Commodities Currencies Stocks If the headlights on your Chevy Trailblazer are out of alignment, you will find it difficult (or impossible, depending on how badly out of alignment they are) to see at night or wh. About 1 month ago, I got the infamous P0300 random misfire code. P0171: Fuel System Too Lean (Bank 1) P0300: Multiple Misfire Detected: Message Closed w/FIX. When the engine light shows up, there is a trouble code stored in the engine control module. A P0304 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. 2009 Chevy Tahoe, code P0301 misfire on cylinder #1,engine light on, service traction and stabilittrack flashing on the DIC. after driving there is a hot. Replaced coil pack, plugs, boots, IC coil controller, O2 - Answered by a verified Chevy Mechanic Engine Misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an … Have an '04 Cavalier w/2 Engine has a noticeable missfire after driving and engine warms. It covers the P0420 code's meaning, symptoms, causes, and possible solutions. The 2020 Chevrolet Silverado is a fabulous choice if you’re searching for a reliable full-size pickup truck. Here are the common symptoms of a bad PCM, location, and replacement cost P0301 Cylinder 1 misfire so my truck is only throwing the code for cylinder one and i cant figure out why. 2005 GMC Canyon Z71 4WD SLE Extended Cab5L I5, 3. The battery is good, and the alternator is putting out 13. It won't be the sixth cylinder that you might see when looking at the. Your Cavalier’s engine needs air, fuel, and spark to achieve optimum ignition. g2a carding method 2022 Special thanks to Nealinator for the Sig Pic. 4'th Cylinder. When it arrives, the battery-electric sports. The ignition module or an ignition coil may fail, causing an. 2004 Chevy Cavalier 2. A faulty ignition control module can cause a number of problems Check engine light is on: The ECM monitors all parts of the vehicle that could affect emissions. SOURCE: 1998 Chevy s10 4 cylinder running rough. P0302 Cylinder #2 Misfire. There is a Factory Service Bulletins for All 2000. Jun 25, 2019 · Service Engine Soon Light. 6 liter misfire! my 2004 Chevy 2500hd 6. code p0300b is set and show misfires on cylinders #1. Learn about the Chevy Cavalier. Have had scanned and found a P0302 code. You will often find this code together with another code of the specific cylinder the misfire occurred on. Im working on a 2004 chevy cavalier 2im getting a random misfire code and blinking engine light. accident on 183 austin today Chevy has had there problems in this area since switching If it was a P0302 which I think is misfire cylinder 2, I would think about doing stuff like changing coil packs, plugs, plug wires, injectors 2004 SILVERADO 2500HD LS Pro Comp Leveling Kit 285-75-16 Cooper. 4'th Cylinder. There are many factors that can trigger this trouble code, including problems with the ignition system and fuel delivery, vacuum leaks, and engine mechanical issues, among others. There are many issues that can cause engine misfires on cylinder 4, resulting in a P0304 code. Learn about this problem, why it occurs, and how to fix it The average cost for a Chevrolet Cavalier Ignition Coil Replacement is between $302 -$354 Search For a Specific Car Problem. I have this problem. There are several engines that will fit the 24L high out put motor, and I have actually seen a chevy cavalier that has a 3800 V6 in it if you want to go all out but in most cases sticking with the ecotec motor or the 2. A rich fuel mixture contains too much fuel in relation to air. Before you can even diagnose P0304 in your car, you need to find the fourth cylinder's location. The computer says the 3 cylinder misfire. A day later it would come roaring back and stay for a week or better, and then go away again. Piston. Air - The air entering your car's engine must be metered by the. I've replaced the following: upstream OS, ignition module, plugs, wires… P0300 is a generic OBDII code that can occur with the Chevy Cavalier. When this happens (misfire), check engine light illuminates & begins to shift strangely. 2 liter dohc 16-valve 4Cavalier dohc gtcarlot Cavalier engine 2003 chevrolet ls cylinder valve dohc liter coupe sport gtcarlot dealerrevsCavalier chevrolet chevy engine 2004 intake air oil 2003 water pump system motor diagram 2002 leak. 2004 CHEVROLET CAVALIER FWD 60,000 MILES. P0300 is a generic OBDII code that can occur with the Chevy Cavalier. A popular car modification is the stereo system. The light will flash under a load or accelerating at highway speeds. tzokatli This Preliminary Information communication provides information to the technician about vehicles that have a Malfunction Indicator Lamp on or engine misfire, rough idle, extended crank, or crank. Subject: 1. My car acts like it wants to stall and it seems to be misfiring. Have changed those 4 injectors, inspected wiring harness and all plug connectors. 2 eng the check eng light stay on an it alos blinksthe car has a miss in it while idiling or accelerating but at a stedy speed it runs fine an has good poweri have replace the plugs an boots alos the coil pack an ignition module. 2000 Chevrolet Cavalier 2. Idles rough and accelerates rough, Idle control valve was. 2L 4 cylinder equipped Chevrolet Cavalier, or Pontiac Sunfire, or Chevrolet Sonoma, or GMC Sonoma. Check Details 2005 chevrolet cavalier ls sport coupe 2. Before you can even diagnose P0304 in your car, you need to find the fourth cylinder's location. 2004 CHEVROLET CAVALIER FWD 60,000 MILES. Mar 17, 2013 · O,the map sensor voltage code may have set due to the fault with the misfire as I know misfires can cause a map sensor code to set as a result. By chatting and providing personal info,. The Chevrolet Cavalier is a line of compact cars produced by Chevrolet. Misfiring on cylinders 2-4-6-8. A failing oxygen sensor or bad catalytic converter are the most common causes of P0420. This one was in really good shape with low miles.
Post Opinion
Like
What Girls & Guys Said
Opinion
55Opinion
You may need to remove the starter motor from you Chevy pickup if it is grinding or dragging, in order to test it. Look at the electrodes and see if they are in. Aug 29, 2018 · 4’th Cylinder. The great American spor. 2 Engine Diagram Check Details Engine 2l chevrolet s10 rebuilt cavalier 4cyl pick hombre isuzu 2000 gmc karking sonoma 1999 2003. 2l, distributorless ignition. Get Yours Today! We have the best products at the right price. Vacuum leaks, bad plug wires, bad coil (s) or ignition module are most likely, but even clogged exhaust, O2 sensors and bad battery can cause these problems. The 2020 Chevrolet Silverado is a fabulous choice if you’re searching for a reliable full-size pickup truck. Before you can even diagnose P0304 in your truck, you need to find the fourth cylinder's location. For complete cylinder combustion to occur, the engine needs three important. 4'th Cylinder. If it was shut down and restarted the problem was gone. amyka lee Thanks for the suggestions, great step by step mwfaith,. Still have cylinder 3 misfire - Chevrolet 2001 Cavalier question 1998 Chevrolet Cavalier RS: car starteda misfirehighwayspeeds I have a 1998 Chevrolet Cavalier RS 2. I have a 2002 Chevrolet Cavalier/2 It's only running on 2 cylinders 1&4. 2L 4 cylinder equipped Chevrolet Cavalier, or Pontiac Sunfire, or Chevrolet Sonoma, or GMC Sonoma. 2004 chevrolet cavalier timing having problem done all that I KNOW TO DO. Learn more about what this problem could mean for you on this informational page. - Answered by a verified Chevy Mechanic KELLEYKAT73 MEMBER 2004 CHEVROLET CAVALIER 4 CYL 2WD AUTOMATIC 116,000 MILES 1999 cavalier misfire/crank shaft code Engine runs rough. About a month ago, when you would start it, it would act like it was running on 2 cylinders and shake badly. Install a test light between pins 5 and 6 and crank the engine. Special thanks to Nealinator for the Sig Pic. 4'th Cylinder. 1l v6 part 5 manifolds & fuel Chevy cavalier 2. It indicates that your truck's second cylinder has a misfire. Aug 14, 2017 · 04cavilier misfire on 4 cylinder - Chevrolet 2004 Cavalier question. The only engine code is P0300. Models: 2004 - 2006 Buick Rainier. diesel mechanic apprentice jobs I did an oil change around 11/14/2022 and put seafoam in my gas tank like a shop told me to do when they said my fuel injectors needed to be cleaned. 4'th Cylinder. 2L, rough idle, massive engine shake, seems like its running on 3 cylinders, pull the spark plug wires while running and the engine shuts off on all cylinders, except #4 - no change in idle when #4 wire pulled, checked the plug, found 1st plug had crack in ceramic. 2004 Chevy Cavalier 2 I changed the plugs but the ignition coil was very hard to put back on. Chevy Mechanic: AMEDEE. 1 One of the first symptoms that a faulty canister purge valve may produce is a rough idle. A faulty ignition control module can cause a number of problems Check engine light is on: The ECM monitors all parts of the vehicle that could affect emissions. 2003 Chevrolet Cavalier 2. There can be a lot of different reasons for a misfiring cylinder. 2 q&a: maf sensor location, engine diagrams & more Cavalier harness diagrams. In worst case scenario, if the ignition coils are in really bad condition, the engine will not start. and a smoke test has been done to discover the vent valve leak. In this video I give a full in depth tour of the 2004 Chevrolet Cavalier. Rotate spark plugs, wires, coils, injectors, NOT all at the same time. The computer says the 3 cylinder misfire. Replace the line if it's damaged. The P0301 trouble code will trigger your Blazer's check engine light. Had rescanned & found p0300, P0302. The hydraulic clutch hose blew out by a large electrical connector - Chevrolet 2005 Cavalier question Browse Categories Answer Questions. Before you can even diagnose P0304 in your truck, you need to find the fourth cylinder's location. 2005 - 2006 Saab 97x2L Engine (VIN S - RPO LL8) This PI was superceded to strictly reference the cylinder head replacement procedure. A clogged catalytic converter is one of the most common problems that will cause misfire codes on one side of the engine. Learn more about what this problem could mean for you on this informational page. what does pnc bank stand for i own a 2005 chevy colorado z71 ls about 2 months ago i took the ride to a chevy dealer about a week later i gett a call that they found. 4'th Cylinder. On "V" configuration engines, it'll usually be the second cylinder on the head further away from the front of the. The vehicle is a 2003 Chevy Silverado 2500hd, 6. simply swap there location and see if the misfire follows the coil pack. 226,000 km-, SK--- 2004 Chevy Cavalier, runs good on the freeway but on normal rd like when I stop at a stop light or stop sign the rpms jump and the car actualy at times lurchesIf I did not have the break on it would a. It’s official: a fully electric Chevy Corvette is coming — with new battery technology to boost its range, acceleration and efficiency. P0300 - this trouble code indicates that there is a random misfire. The cutting out (random misfire) continued, but just every now and then P0300 - Random Multiple cylinder misfire detected and. It indicates that your car's second cylinder has a misfire. Check Details 2005 chevrolet cavalier ls sport coupe 2. SOURCE: 1998 Chevy s10 4 cylinder running rough. I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time. Before you can even diagnose P0304 in your car, you need to find the fourth cylinder's location. View local inventory and get a quote from a.
Although generic, the specific repair steps may vary depending on make/model. If a misfire is occurring in only one or two cylinders, you will usually find a misfire code for that specific cylinder rather than a random misfire code Have a 2005 silverado 2500hd 6. If the last digit is a number other than zero, it. At idle it's like 1-30 times Per cycle. It stands for: P0304: Misfire Detected → Cylinder 4. Code P0300 "Random or Multiple Cylinder MisfireDetected" is set in the powertrain control module (PCM) and the vehicle runs rough. SOURCE: 2000 CIVIC System too lean Cylinder 3 and 4 misfire Deteced P0171: This means that the oxygen sensor has detected a lean air-fuel ratio. So, it's mostly a code for V8+ engines. citi rewards card login 2004 chev cavalier with 2. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 4. This could lead to poor fuel economy, the previously mentioned rough running engine, backfiring, a flashing check engine light, and an engine that has no giddy-up and go Related Documents & Media 2004 Chevrolet Cavalier Message Closed w/FIX. This occurs because the injectors are not providing a consistent flow of fuel, causing the engine to operate unevenly. 2002 Chevy Cavalier misfire2 liter OHV Chevy Cavalier. 370 posts · Joined 2015 So for well over a year I have been fighting a periodic cylinder 7 misfire. waifumiia video It also said the exhaust valve springs and. Could also be a bad ground, make sure all your grounds are making solid connections. P0304 is a cylinder-specific misfire code, meaning only your Malibu's fourth cylinder has a misfire. Bulletin No Date: June 24, 2005 Subject: Flexible Fuel (RPO L59) Rough Idle, Misfire, MIL DTC P0300 (Install Intake Manifold Gaskets With Teal Green Gasket Material) Models: 2002-2004 Chevrolet Silverado, Suburban, Tahoe 2002-2004 GMC Sierra, Yukon, Yukon XL with 5. huntington porsche 2004 Chevrolet Cavalier-Maintenance & Repair. P0303 OBD II Code Causes: Chevy Tahoe A fouled iridium plug vs Here are the most common P0303 Chevy Tahoe causes; they are presented somewhat in order from most to least likely to be causing the code in your vehicle: Bad Spark Plugs- A fouled spark plug is the most common cause of P0303. 8L 4 having a occasional misfire at idle. - Answered by a verified Chevy Mechanic KELLEYKAT73 MEMBER 2004 CHEVROLET CAVALIER 4 CYL 2WD AUTOMATIC 116,000 MILES 1999 cavalier misfire/crank shaft code Engine runs rough. but even 2 of them have failed started at about 60000 Chevrolet Cavalier Check Engine Light and Misfire Due to Ignition Module/Coil Failure - 36 reports.
Posted to GM Driveability on 7/2/2004 8 Replies Summary posted 7/18/2004 Hesitation, Misfire: Occurs: Always: Misc 42: est: Message Closed w/Summary. On “V” configuration engines, it’ll usually be the second cylinder on the head further away from the front of the engine. misfire timing View All » Question about 2004 Chevrolet Cavalier 2004 chevrolet cavalier timing having problem done all that I KNOW TO DO. Had rescanned & found p0300, P0302. If the problem persists, more tests need to be done to diagnose the problem, see "Possible Causes". Expert Advice On Improving Your Home All. The 1997 Chevrolet Cavalier has 1 problems reported for p0301 random multiple misfire. It’s official: a fully electric Chevy Corvette is coming — with new battery technology to boost its range, acceleration and efficiency. See pricing for the Used 2004 Chevy Cavalier Sedan 4D. Check your coil, 4 injector connector, and remove the 4 plug. stuttering, rough idle, no problems starting the car tho. The truck had a complete tune up done by me roughly 15k miles ago. The Chevrolet Nova was one of the most successful compact cars of all time. On "V" configuration engines, it'll usually be the second cylinder on the head further away from the front of the engine. 6. Aug 29, 2018 · This page is meant to help you troubleshoot the Chevy Cavalier P0420 trouble code. 2L The car has 140000 miles, has been well maintained. Got multiple cylinder misfire code, car runs no better after changing spark plugs. Online car repair manuals. Used 2004 Chevrolet Cavalier pricing starts at $2,291 for the Cavalier Coupe 2D, which had a starting MSRP of $15,810 when new. I can assist you today. 2014 chevy cruze. Need Help Wiring A Sd Sensor Chevrolet Forum Chevy Enthusiasts Forums. 4 liter Code 440 Car runs rough as hell, acts like a miss so i replaced the coil housing, coils and plugs. Hold Steady: Now hold your speed steady at 55mph for three minutes. craigslist fredericksburg tx On “V” configuration engines, it’ll usually be the second cylinder on the head further away from the front of the engine. If that is not the issue, you will need to check the other usual causes. 4'th Cylinder. The customer said the vehicle ran fine the day. It has a hard time starting and when running is misfiring and smells like gas bad. Scanned on computer codes that - Chevrolet 1999 Cavalier question Misfire after a number of fixes coil pack misfire p0300 spark plugs Jump to Latest Follow 15K views 23 replies 11 participants last post by Ravalli Surfer Oct 20, 2023 X xj900 Discussion starter 11 posts · Joined 2009 #1 · Nov 8, 2009 (Edited) Whats up, × We use cookies to help our site to work, to help us understand how it is used, and to tailor advertising on this and other sites. have had to replace module 4 times after market doesn't last near as long as chevy parts. P0303 will often be accompanied by codes P0301, P0302, P0304, P0305, etc… These codes indicate a misfire in cylinders one, three, four, and five, respectively. I have a 2004 Tahoe which has misfire problems (P0300). 2004 Chevrolet Cavalier 2. I have a 2004 chevy malibu classic, 2 It was running fine and i parked outside of Walmart to do some shopping. When one or more of these variables is off, it can lead to a rough idling condition. 2L Excessive Emissions, Misfire, MIL Lamp on. 2 ecotec Car turns over,. 2001 cavalier cylinder 3 misfire. 586 Technical Service Bulletins (TSBs) have been issued for the 2004 Chevrolet Cavaliercom:. Do not use seafoam you will only create more driveability issues. P0420 is the most common OBDII code and is virtually never a breakdown risk Misfire Codes. The signals of the camshaft position sensors are used to determine which cylinder is misfiring. 0 mystery misfires was created by davidgrisanti. * Faulty coil (pack) * Faulty oxygen sensor (s) * Faulty fuel injector … 2004 chevy cavalier misfiring. Cylinder 1 Misfire - Tried Everything! I have an 07 Avalanche with 240k miles that developed a cylinder 1 misfire several months ago. genesis parent portal tenafly If the regulator is leaking gas than it can cause this problem. Description: Used 2004 Chevrolet Cavalier LS with Front-Wheel Drive, 1SA Package, Preferred Equipment Package, Alloy Wheels, Splash Guards, 15 Inch Wheels, Premium Sound System, Full Size Spare Tire, Cloth Seats, Rear Bench. 2 Ecotec engine used in the Saturn Ion, Chevy Cavalier, Chevy Cobalt etc. P0303 OBD II Code Causes: Chevy Tahoe A fouled iridium plug vs Here are the most common P0303 Chevy Tahoe causes; they are presented somewhat in order from most to least likely to be causing the code in your vehicle: Bad Spark Plugs- A fouled spark plug is the most common cause of P0303. Few things are as annoying as turning the key in your truck and finding it will not start. Changed spark plugs, old ones were black. The vehicle may produce excess vibration, especially at lower RPM. Here's the symptoms) Rough idle for a few minutes, ranges from 800-1250 rpm for approximately 2 minutes) Smell of gasoline around the tail pipe and the fuel rail) Loss of power when accelerating (pressing the accelerator over 1/4 through any gear. 1 Answer. 2003 cavalier has a miss at idle rpm goes from 500 to 1000 i relaced plugs,wires,o2senser,iacsenser,control module,intake gasket,doesent have a pcv valve but unpluged a hole in intake cause it build pressure in valve cover and put oil in intake motor. bulletin regarding belt noise of engine, rough idle. The two most common causes for it are a dead battery and key issues. Idles rough but smooths out as soon as you hit the throttle. Misfire diagnosis and repair is important to eliminate possible Catalytic Converter. P0303 is a real drivability concern and should be dealt with right away. You should only be seeing this code if you have an engine with at least 8 cylinders. In this case, you will notice the car running inconsistently while stopped or driving at low speeds. It has been in the shop for 5 weeks now trying to solve a random misfire problem. It's and OBD2 code and means that a misfire has been detected in the 8th cylinder in the firing order. Went to start car, engine wouldn't fire, possibly flooded. P0304 is a cylinder-specific misfire code, meaning only your Malibu’s fourth cylinder has a misfire. If the last digit of the trouble code is not zero, e, if the generated code is P0302, the number 2 indicates that cylinder number 2 has a misfire. 2004 cavalier 2 P0300 code for random misfires.