Golf IV / Jetta IV :: Catalytic Code / Cylinder 3 Misfire P0303
Jul 8, 2015
I own a BMW not a VW! My 19yr old daughter purchased her first car a few months ago, an '03 Jetta 2.0L with approx. 170,xxx miles. Just after she got it we pulled a P0420 code, but it ran fine so we haven't worried too much about it. I've cleared that code and after about 2 weeks it will come back. Last week it started to have some issues with rough idle, stumbling/hesitation. I pulled the codes yesterday an in addition to the catalytic code is a cylinder #3 misfire P0303. I thinking the 2 codes are not related. I'm assuming the typical things to look for on the misfire are coil, wire, plug? Looks like the coil on this engine is a combined unit so no switching coil packs to see if the miss follows a bad coil pack.
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I have a 2000 VW Jetta 2.0l AEG engine with 190,000 miles and check engine code P0303 for the 2nd time in 3 months. I had this same code 3 months and 3000 miles ago and found the spark plug #3 to be fouled up. All other plugs and wires seemed to be okay so I replaced plug #3 and the problem went away. I suppose after I take off the upper intake manifold I am going to find the same plug #3 to be fouled up again. The engine is a typical AEG that I have to add 1 quart of oil every 1000 miles as it has been burning the same amount of oil since I acquired the car at 135,000 miles. I have read that the wrong piston rings were installed from the factory on a large number of these engines and VW says that if less than 1 quart of oil is burned after 7500 miles it is normal. I really don't feel like spending 2 hours every 3000 miles to replace plug #3 ? It might be time to part ways with my 2nd VW. As a side note, this car has been averaging 35.5 mpg over the last 55,000 miles that includes 50% city/ 50% highway driving. I coast to red lights and don't accelerate quickly with the 5 speed manual transmission to achieve hybrid like fuel efficiency.
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It keeps reading the code P0303 "cylinder 3 misfire". All coil packs, fuel injectors, spark plugs have been replaced. The exhuast smells normal. The oil is the correct color(maple syrup color, NOT milky). It's not blowing through coolant. Compression test came back normal. It's not the cat converter because the exhaust doesn't smell like rotten eggs. The car is sometimes hard to start. it hesitates/stumbles and shakes really bad. It feels like its not getting enough power.
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I got a check engine light. I went to Auto zone to get it read & they came up with a P0303 - Cylinder 3 misfire. Since I bought the vehicle a couple of months ago, I don't know when the plugs were last changed, so I decided to change them. However . . .
Is there a secret to getting the plug boots & wires out of the hole and off the plug without wrecking the wires?
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I have searched but with no solid answer..
What I got - 04 Camry, 231K, never had issues, do all my maintenance myself, brakes, plugs, oil etc..
#3 Cyl misfire..
Possible causes
Plugs, - Has been about 2 years since I replaced
Coil - Bought car new in 04, never replaced
Cat - never gave it a second thought
fuel injector - put techron by Chevron just about every oil change, I know I missed one here and there..
burned exhaust valve - say it aint so...
poor compression - I have to rent a tool...
defective computer - I don't think so..
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So I have a 2004 Jetta gli 1.8turbo and my CEL came on last night from normal driving, after it came on it still drives the same. I had it scanned for codes and got the p0303 cylinder #3 misfire. wondering what could be the solution for this? I dont think its the coil pack because I had them changed at the dealer from the recall about 2 months ago (anyway to check?) Also I have 97,000 miles on my car and my last oil change I used 0w-40 oil. I know this is probably not the best oil to use at this mileage but I had an extra 5 quarts of them laying around so I decided to use it.
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1997 chevy k1500 ... I have a misfire on cylinder 3 that i cannot figure out the cause. The idle is rough, backing out after starting is very rough, it seems to pick up at higher rpms but once the truck upshifrts to the next gear it shakes like a leaf in fall. within the past year the engine was rebuilt all new seals a new fuel pump, new injectors, new everything practically. so far i have done the following:
compression test results:125-130psi
fuel pressure test results: 50psi once primed, 50psi with engine running, no immediate pressure loss after engine is shut off
new spark plug wires
new spark plugs
replaced all four o2 sensors
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So my 2001 5.3L truck has 206,648 miles on it. Over the years, it's been serviced every 5K with the only big repair being head gaskets which were done about a year ago.
Two weeks ago, I hit the gas to merge into traffic and the SES light started flashing and I could tell there was a miss. I got off the gas and a few moments later, the light went out and the miss was gone. I pulled the code and it was P0303 so I change the plugs, wires, and the coil pack for Cyl 3 fuel filter and ran a double dose of Sea Foam through the gas tank.
Bad news is I still have the problem. The truck drives fine; in fact, I pulled my bass boat 75 mile round trip yesterday. Everything is OK till you hit the gas hard to merge or to go up a big hill or pass someone. When you hit the gas hard, SES starts flashing and there is a miss. I also noticed the valves ping loudly when the SES is flashing. The only code it's giving me is P0303.
Could this be a bad injector not delivering enough fuel at higher RPM/under load? I was going to swap injectors and see if the miss moves. Any tips on popping those injectors out?
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01 Taurus, 3.0 pushrod motor. Single 6 pack style coil. I replaced worn plugs 2 months ago for misfire. Car seemed to run fine. Now, I have misfire again. Code is for single cyl, 0303. Would u expect plug to foul, or bad wire, or possibly bad coil? I don't know how these ford coil packs fail. Can u lose 1 or more spark outputs with them?
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2009 corolla 1.8l 155,000 miles. Replaced iridium spark plugs at 100,000
I got a CEL few weeks ago, P0301 Toyota - Cylinder 1 Misfire Detected
Car has been running bad for about 2 weeks now, excise noise on the highway, especially up hills.
Yesterday, I took a look, replaced the spark plug in cylinder 1, same results. Checked the coils using one of those flashing tools, all 4 flashed quickly, with no breaks in flashing. put it all back together, cleared the code, went home.
Took it out for a drive today, and it started running way worse. Checked the CEL, and now I have both P0301 and P0303 Misfire on cylinder 1 and 3. Barely made it home, ran VERY VERY bad.
Got home, and made a video of it. It just kept dying. Check it out here. [URL] .....
Also, when it does run, it almost sounds like I can hear excess air, its hard to hear in video, but doesn't sound right. Maybe air leak? How do I check?
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We got our latest Santa Fe computer email and it warned of an engine fault. The car itself was not flashing any warnings though. Took it to the dealer and they said OBD was throwing a P0303 cylinder 3 misfire code. They shifted the ignition coil, and replaced the injector and seal before resetting the code. They had the car for 3 days though. Car was not running rough or anything else you would expect from this type of issue. Still trying to figure out why we got the email with no indication of trouble from the car itself.
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2003 hyundai accentra and I have trouble code P0303 misfire detected cylinder 3 the car would run rough and hesitate at idle and run rough in drive and reverse I checked the plug gap on number 3 cylinder and it was excessive so I regapped it and put back and the car run good for about a day and now the engine light is back and is running rough and hesitating.
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Code: P0303 Misfire on cylinder #3.
Swapped coil from cylinder #3 to cylinder #6 and fuel injector from #3 to #2.
Shows misfire is still on #3. Plug looks normal tan brown.
#3 is the middle cylinder closest to the firewall I take it.
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On my wife's '99 Explorer, she just acquired, we had a P0303, #3 cylinder misfire. I found the plug cracked and replaced it. Do the codes reset themselves or do I have to do it? I'd rather not disconnect the battery and reprogram the radio.
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I own the 2014 Santa fe turbo 2.0 litre limited which has 4000 km on it. Within 210 km the engine light came on 3 times. I took it into the shop and they ran a code of P0303 which is a misfire, they changed the coils #2 and #3 and cleared the code. The second time it showed the same code but the shop said it was in the history so that is why the same code came up again. They ran an update ECM? and all was good. Now the 3rd time they tell me no code has come up and can't do anything about the engine (they cleared it) but it was like chasing ghosts. My vehicle runs great so not sure why I am constantly having this issue.
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Got a 1996 Ford Ranger with the 4.0L in it that has a misfire on the #3 cylinder and giving check engine code: P303. Have tried new plugs, wires, distributor, switching out the coil pack with a known good, checked injectors for pulse, checked injectors, moved injectors and still the misfire remains on #3. Removed the valve covers and all appears to be well.
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2000 Jetta GL 2.0 AEG. I am receiving the P0304 which I have identified as Cylinder misfire #4. I read on some previous posts that I cannot be the distributor because if it was I would be receiving misfires on two cylinders. The spark plugs are OEM NGK and have been replaced recently.
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Alright so my car is popping up 4 codes.
P0411 - Secondary Air Injection System Incorrect Flow Detected
P0300 - Random/Multiple Cylinder Misfire Detected
P0302 - Cylinder 2 Misfire Detected
P0303 - Cylinder 3 Misfire Detected
Vehicle: 1999.5 VW Jetta MK4 2.0L GLS (AEG)
The P0411 code I have had for a while now and I been lacking to fix it. I pretty sure I can get this fixed but it doesn't cause problems so I haven't paid to much attention to it. Anyways, the other day I noticed a puddle of coolant under my car so after checking it out, the water pump was leaking so I bought a new one and replaced the old one. However, during the replacement process I had to remove the timing belt and I accidentally turned the top pulley about 1 notch and didn't notice at the time. After putting everything back on, I turned my car on and the engine sound a bit weak so I ran for about 10 minutes around a couple blocks.
I instantly noticed that the car had no power and it took me a long time to speed up. When I got back, I plugged in my scanner and I only had the same P0411 code and nothing else. After carefully reviewing the camera I had recording during the water pump replacement, I notice I had turned the top pulley a bit so I went ahead and removed the timing belt, readjusted it, and it worked! I was excited that the car was working fine again. Soon after, I headed out to take a drive and noticed after 60MPH the car didn't have much power. The car still accelerates after 60MPH, but extremely slow. As soon as I arrived back home, I plugged in my scanner and that is where I seen the 4 codes. Now my question is what could have caused this? Could I have damaged something when I ran my car with the incorrect timing?
Things I have done so far:
-I checked to see if I left anything unplugged.
-I checked for any vacuum leaks
-I checked my oxygen sensors so see if I was running rich/lean
Things I will do after work today:
-Check the spark plugs
-Check spark plug cable for damage
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I recently changed my spark plugs + coil packs in my 01 1.8T because it read a couple cylinder misfire codes. Drove it for a few days out of curiosity plugged the code reader in again and it's still reading misfire codes. What could the issue be still?
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She is a 1999.5 Golf 2.0 (although, she just has a rabbit symbol on the hatch, is she a Rabbit or did someone remove the Golf badge?) I just bought the car, with less than 160,000 miles. The dome lights work sometimes, Door Ding works intermittently as well, but sometimes will "glitch" in other words it will be making the sound but it kind of stutters? Odd? The horn sometimes works, however it is very silent? Check engine light is on with a camshaft position sensor code and miss on cylinder 3. Someone told me to replace the "109 relay"... could this be the problem or is this the CCM?
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2000 Jetta 2.0 cylinder 2 misfire. Replaced plugs and wires. No check engine light but code is pending and there's still a misfire. Need to smog
Replace coil pack?
Swap fuel injectors and recheck?
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