Passat (B6) :: Engine Running Rough And CEL On - Misfire On Cylinder 2 And 4
I'm having an issue with a 2008 Passat 2.0T. Engine ran rough one day and check engine light came on! I get the VagCom out, scan the ECU and get misfire on cylinder #2 and #4. Car has 109 000km. Plugs were never changed so I order some new OE Bosch platinum iridium plugs. Go for test drive after having change the plugs and I still get misfire on both cylinder number 2 and 4.
I know coil on plug are prone to be weak on those engines so I go ahead and order 4 new coils which are pretty low cost which is good. Once install on the car I go again on a test drive. car ran really smooth and no check engine light came on. I said fine! I fixed the problem only to discover the day after that the CEL decide to come back on I scan again and this time only get misfire on cyl #2 with fault frequency of 39.
I suspect my injector to be bad but before I decide to remove the intake manifold and spend another 2-300$ in parts. Any way to test my injector with VagCom in order to see if that really is my problem. Also heard the PCV could be a problem but i hardly doubt it would throw a fauly code on just one cylinder.
Passat (B5) :: 2004 1.8t Running Rough With CEL On - Misfire On Cylinder 1
My 04 1.8t is running rough with the cel on. i scanned it and cyl 1is misfiring. tried changing plugs. seemed to work while idling but as soon as i accelerated it started running rough again.
View 4 RepliesCelica :: 2000 1zzfe Engine Was Running Rough - Cylinder 1 Misfire
Okay so last year i bought a 2000 celica gt manual with 50,000 miles, and currently has 67,000 miles. A few days ago I started to notice the engine was running rough and then about 10 miles later the chack engine light came on. I promptly went to the auto parts store to read the code. I was informed I have a cylinder 1 misfire. Naturally i replaced the spark plugs with NGK iridium, reset and rechecked engine code. Same code. Next i swapped the coils from 1 and 2, reset and rechecked. same code. I then swapped fuel injectors from 1 and 3, rest and rechecked. Same code. So now i am a bit stumped.
Only faulty equipment prior to this incident would be 2nd gear synchronizer. Only applicable above 5,800 RPM.
Chevrolet - S-10 :: 1996 - Running A Bit Rough / Irregular Idle / Cylinder 1 Misfire
My 1996 S10 2.2 liter pickup has been having some 'issues'. Truck has been kind to me over the years, but now is running a bit rough. It has an irreguler idle and continues to run this way through all speeds. The blinking code reads "cylinder 1 misfire". I did all the basics. I changed the plugs and wires, ignition coils and fuel filter. Here is where is gets tricky, after changing the fuel filter, it ran great again. Then it started to run rough again later that day. I thought I somehow clogged up the new filter, so I removed the new one for inspection. Realizing there was nothing wrong with it, I reinstalled. Truck ran great again. Went out to drive it to work a couple hours later and it started fine, then after about 10 seconds of running, it went back to the rough idle.
View 19 RepliesSubaru - Outback :: 2007 Running Really Rough And Stalls Out / P0303 For Misfire In Third Cylinder
So I have been unable to figure this problem out and so had my mechanic, I am starting to think this car is cursed. I have an 07 outback with about 54000 miles on it, a few weeks ago it through a P0303 for a misfire in the third cylinder, thought nothing of it, light went off in the next couple starts and the car was running great. Had this happen a couple more times but only after the car had been out in the rain. Each time the problem went away. Now the car has sat in my garage for four days, I got out to start it and get an extremely long crank but no turn over. Try again and after 5-6 seconds car turns over but is running really rough and stalls out. Disconnected the battery checked hoses, everything looked normal, reconnected the battery and now the car is running fine.
View 3 RepliesFord - Taurus :: 2005 Started Running Rough - CEL Came On / Cylinder 5 Misfire Detected
My wife's car suddenly started running rough. 2005 Taurus, 6 cyl, 3L, OHV, 83K miles. CEL came on and code came back as "P305 - cylinder 5 misfire detected". As a side comment, her tachometer has been fluctuating big of late as well.
View 2 RepliesFord - Explorer :: 2003 - Misfire On Cylinder 8 / Running Rough At Idle And Under Load
126000kms on 03 explorer 4.6 truck started. Running rough at idle and under load.... Code came up for cyl 8 injector. Replaced injector... problem still there. Switched cop and plug with another cyl and plug.... same code and cycl 8 is definitely not working. Would a generic problem always affect i cylinder. I even checked wire clip on for injector... it appears ok. There is power to injector wire clip.
View 5 RepliesHyundai - Sonata :: 2005 - 1st Cylinder Misfire - Runs Rough - CEL Comes On
I have a 2005 Hyundai Sonata 4cyl. and have a misfire problem with the 1st cylinder. I've had it pressure checked and there isn't a problem with the cylinder, such as a ring or warping problem. I've replaced the wires, both boots, both ignition coils and the plugs twice. I was told I need to replace the ignition coil again but I wonder if there is something that is making the coil go bad. I've also replace the throttle position sensor and both O2 sensors. I had the front catalytic converter replaced because it was bogging down and very slow. It still runs rough and the check engine light is on. I was told also that I need to replace the engine speed sensor. I bought the car in Oct. of 2004 and only has 68000 miles on it.
View 2 RepliesFord Ranger / B-Series :: 2000 - Running Rough And Code For Misfire On Cylinder 3 / 2nd Coil Pack
2000 4.2....Last year I had to replace the coil pack when it started running rough and had a code for a misfire on cylinder 3. It is doing the exact same thing now, same code, same cylinder. Is there something wrong that is causing this?
View 5 RepliesFord Ranger / B-Series :: 2003 3.0 - Misfire On Cylinder Six / Running Rough And Check Engine Light On
I have a 2003 ranger and have had ongoing problems with misfire cylinder six and have had three different mechanics diagnose the problem as a bad ground. I have replaced all plugs, wires, coil pack, injectors and am constantly pulling the plug on cylinder six, cleaning and often replacing, I also disconnect the battery so it resets the check engine light and it runs fine for about 100 miles and starts running rough again and on goes the check engine light. I have 134000 miles and have maintained it since new.....
View 4 RepliesAccent MC (2006-11) :: 2008 - Running Really Bad / Cylinder 1 Misfire
This morning my son started the 2008 Accent and it ran really bad, he shut if off started it again and still ran really bad and check engine light started to flash. Shut it off and ran for the bus to school.
Went and picked up a OBD scanner and found a cylinder 1 misfire. Tried to start it and had a really hard time and when it did start ran like crap and smelled gas. Checked the codes again and now got Multiple cylinder misfires, cylinder 4 misfire and cylinder 1 misfire.
Pulled the engine cover to pull the coils and plugs and I find a ton of mouse crap. No signs of any chewed wires or anything that I could see. Drove it to the local Hyundai dealer tonight because I am worried that it may not be the coil packs. Drove OK to the dealer. My brother is the service manager at the local Mazda dealer and he sees a lot of mouse damage. Said I should put a couple of old socks with moth balls in the engine compartment to deter the mice.
Lexus GS 2006-11 :: GS300 Rough Idle / Misfire On Cylinder 2
I bought a 2005 3rd gen about 8 weeks ago and I love it except for one problem, a really bad idle/vibration through the cabin when cold starting, it improves when the engine is warm but is still noticeable.
It went back to the dealer where I got it and they gave it a full service, new plugs, oils and filters and replaced the transmission oil too after the check vsc and engine management lights came on.
The codes pulled showed a misfire on cylinder 2, the dealer said the service would cure all and sure enough no more vsc lights but the rough idle and vibration are persistent.
The car has only 78000 miles and I'm pretty certain a Lexus isn't supposed to behave like this.
Accent MC (2006-11) :: CEL Flashing / Rough Idle - Cylinder 1 Misfire
I did not get the specific cel code but its what the guy told me at autozone.
Long story short. Washed engine, let sit for about 30 mins. Car started with flashing CEL and was "puttering" and very rough idle. Drove home took intake off and replace with stock, took spark plugs out and they were not wet. Then let it sit for about 15 mins. Started just fine. No CEL at all.
The accent saved the CEL and the guy told me that Cylinder 1 had a misfire.
My question is, should I do anything now even though the car seems to be running ok?
Accent MC (2006-11) :: 2009 - Idling Rough / Cylinder 2 To 4 Misfire
So recently my 2009 hyundai accent has been idling rough, and has been very sluggish when accelerating. Usually the rough idling is the worst when the car is first turned on and tends to tone down as the car keeps running. I had the codes red and I believe it was C0302 C0303 C0304, saying that cylinders 2-4 were misfiring.
I replaced the spark plugs which didn't fix the problem, although cylinder 4 did have a small amount of oil above the spark plug and a little bit more below the spark plug, I am not sure if that means anything useful or not. I don't have a way to check the coils directly but I swapped coil 2 with coil 1 and checked the codes again and it was still cylinders 2-4 misfiring, so I would imagine that means the coil isn't the problem. I then tried spraying WD-40 around the vacuum tubes, and if the intake manifold is on the back of the engine I tried spraying it around that gasket as well, but I didn't notice a change in the idle speed.
At this point I am not entirely sure how to proceed, from what I have read the issue causing a misfire would be either there isn't a spark, which seems unlikely at this point, or the mixture of fuel to air is wrong. That is the part I am unsure of how to diagnose/
Sonata NF (2006-10) :: 2007 V6 Misfire / Rough Idle But No Codes
I've got a troublesome misfire in a 2007 Sonata V6, 70k miles, which I have been trying and failing to track down for a long time.
More than a year ago, the owner of the car complained of rough idle. When this was first mentioned, I looked at the car, she and I talked, and I concluded that she hadn't changed the oil in some 20k miles. ...... Nothing else seemed wrong. I changed the oil, thinking that what she needed was an oil change.
Some time later, I was in the car myself and all of a sudden felt a strong bucking. Must've been a misfire. I recommended taking it to the Hyundai dealer, thinking the so-called 100k mile powertrain warranty would cover whatever it was (it didn't but whatever).
We drove it to the dealer. The dealer firstly informed us that the CEL had burned out, so we had missed some codes. The dealer further us the car needed new plugs and replacement of both upstream O2 sensors. Here was what the mechanic wrote:
"BETWEEN 35-40 PUT CRUISE ON AND WILL FEEL. CHECK AND ADVISE COMES AND GOES. MULTIPLE CODES STORED IN SYSTEM. ... P0300 RANDOM MISFIRE (ACTIVE), P0140 O2 SENSOR CIRCUIT NO ACTIVITY, P0154 O2 BS S1 NO ACTIVITY. WATCHED O2 VALUES AND FOUND ERRATIC READINGS. FOUND TSB 10-FL-012 SUGGESTING REPLACEMENT OF BOTH UPSTREAM O2 SENSORS. RECOMMEND COMPLETE SYSTEM TUNE UP FOR RANDOM MISFIRE. HOWEVER MISFIRE COULD BE RELATED TO O2 ACTIVITY.
So the owner went to a different mechanic and had the plugs, upstream O2 sensors, and one of the downstream sensors replaced. All OEM, I believe. ($$$!) (O2 sensor parts 39210-3C100, -3C200, and -3C400) Dunno why the downstream one was replaced, not my doing.
Following this, there was no real improvement. No codes either. The problem comes and goes, so maybe I thought it was fixed, but it has come back. Sometimes, it can be felt just slightly when the car starts cold. Other times, it can be felt just barely when driving at a consistent speed. Sometimes, the problem becomes really bad and jerks the car around. Other times, nothing.
What to check next? Coil packs? Intake manifold gasket? She never gets "top tier gasoline," but I would be skeptical that that's the problem. These are the top three suggestions I've heard.
Ford 7.3L Power Stroke (1999-2003) :: P0269 Cylinder 4 / P0284 Cylinder 8 Running A Little Rough
So I did a cylinder contribution test and a buzz test today. It buzzed evenly on all cylinders. Then when I did the cylinder contribution test I got these codes,
P0269 cylinder 4 contribution balance
P0284 cylinder 8 contribution balance
It has been running a little rough lately but not smoking. Seems to be chattering more than it was too. I did the FRx, HPx, CVDs and banjo bolt mods about 500 miles ago and it was a lot quieter and ran better. Just recently started running rough and a little louder. Could these injectors be bad? I did new injector O-rings about 800 miles ago. I ran the test with the engine cold and with it warmed up and got the codes both times. It seems to have a little bit of throttle flutter when holding it about half throttle while driving.
As far as I know the injectors haven't been replaced and they have 186K miles on them.
2001 F-350 Lariat Dually Supercab 6-spd manual 7.3 Powerstroke Turbo Diesel 186,000 miles....
Passat (B5) :: 1.8T - Rough Idle / CEL Came On / Misfire On Cylinder 4 And 2
So every once in a while I would start my car and get a rough idle but not too bad. I got a cel after a few times of this happening. I had a misfire on 1 and 4 and possible misfire on 2. It was ok for a a couple days. But during the last few days I'll start it up and it's fine. But then if I shut it off and restart it will have a rough idle again. Also today I got gas and then it rough idled and when I would shift or put it in neutral the rpm would stay up and drop slowly down. Like if I shifted gears I could almost do it without the rpms dropping at all. I've got 110k. ??
View 6 RepliesPrius (2004-09) :: Misfire On Cylinder 2 And 4 - Car Severely Idle Rough
I own a 2007 prius, it has about 320,000 miles. It has recently been diagnosed with a #2 and #4 cylinder misfire. The car severely idles rough, but when getting in the gas it goes away. I have replaced the spark plugs, the old plugs were very white(lean), replaced fuel injectors, used fuel injector cleaner. I've sprayed carb cleaner around the intake to see if I might a leak--no leak. The motor uses about a quart of oil every 1,000 miles since about 100,000 miles. I'm just guessing, could it simply be low compression causing this? I pulled the new spark plugs after about 5,000 miles and they where white also.
View 9 RepliesElantra XD (2001-06) :: Cylinder 2 Misfire / Rough Idle Especially After Fill Ups
I have a 2001 Elantra with 170K miles. well taken care of. I've been having a rough idle issue for some time now. The car idles very rough. I checked for codes and I got the cylinder 2 misfire code (P0302)...
I started out and replaced the plugs and wires, no solution...
I replaced the coil packs, no solution...
I replaced the MAP sensor, no solution...
I figured it may be no to low compression, so I did a compression test and all cylinders came back normal, still no solution...
I figured it might be a dirty injector, so I poured some seafoam in the gas tank, and no solution...
So my next step is to switch out the injector. Is there anything I am overlooking?
Here's the big thing that is happening too... Everytime I fill up the gas tank, I turn the car on and it idles even rougher. Like if you talk while sitting in the car, you sound like Chevy Chase when he is on the vibrating bed with Beverly D'Angelo in the movie vacation! LOL. It slowly goes away after 10-15 minutes of driving. All this rough running engine ONLY happens at idle, otherwise it runs very smoothly.