Golf IV / Jetta IV :: Running Rough And 3 Codes Stored - Cylinders 2 And 3 Misfire
Aug 4, 2016
So my daughter's 2000 Golf Mk4 with 160,000 miles on it was running rough and had 3 codes stored - cylinders 2 & 3 misfire and a 411 secondary air injection problem.
Having had the misfire code before I swapped injectors around and the error code moved cylinders with the injectors so I attempted cleaning them and also cleaned the throttle body and intake manifold. At this point car still running rough but also started smoking badly.
Replaced the following items:
- Spark plugs
- Spark plug wires
- PCV valve
- PCV hose
- Fuel injectors w/ remanufactured
Hose reconnected between secondary air injection pump and air intake - previous owner had duct-taped it in when he couldn't get it to seal I guess. I've never heard it run.
Car running better, idles more smoothly, doesn't stumble or stall like it did before, no error codes coming up BUT car smokes a lot and the fumes make me feel sick just driving it a mile.
The car had never smoked like this before, hasn't had a whole lot of love the last year or two but no real problems either so why the sudden smoke?
At first I assumed it was cleaner being burned off but that should have been gone in under a minute and this is on-going. It's bad enough to not only be embarrassing but apparently dangerous as the fumes are bad.
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I was driving along the highway cruising at around 100 km/h when out of nowhere the car started driving a little rough so I look down and the ASR (traction control) light was on. I got off the highway, shut it down and fired it back up. The ASR light was off and car running like normal. When I got home I scanned it and these codes came up:
The catalyst code if from my catless turbo-back exhaust which I plan to fix next month with a tune. Anyway I cleared all codes and continued on my way without any other hiccups. So is my MAF sensor dying/dirty? ECU? N75 valve? Boost leak? I'm making a boost leak tester today just to 100% eliminate that variable, though I'm fairly certain I'm good there.
The car is mostly stock except for a few bolt-ons, all of which I've had installed for thousands of kilometers now. Here is what isn't stock, not including suspension, wheels, etc:
Forge 008 diverter valve
034 Motorsports PVC silicone hose kit
Samco boost hose kit
Forge silicone turbo inlet pipe
Eurojet SMIC
custom built 2.5 stainless, catless turbo back
AEM Dryflo short ram intake
GLI MFA cluster
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I have a buddy at work who has an 04 f350 6.0 that is running very rough. we put a scanner on it and disabled the injectors and 1,7,8 have no change. He checked the FICM voltage and is getting 48 volts on crank and run. He checked the wiring for anything loose or rubbed but nothing seems wrong.
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I have a 2008 MK4 2.0 with only 53,000kms. At 40,000Kms I put new OEM spark plugs.
Just recently, every morning when I start the engine is sputtering and rough running. The engines want to die but I give a little gas, and run rough like it is only firing on two or three cylinders.
When it gets to the normal operating coolant temperature it runs without any problem and I can use the AC. Its only give me this problem on the first start of the day.
Does not have any MIL light on the instrument panel. I scan it with VCDS-Lite and do not found any fault codes. The only thing that's come to my mind is to change the Green Coolant Sensor.
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04 trailblazer, 4.2. Running rough and SES light on. Had codes pulled and showed p0340 (CMP sensor circuit malfunction) and p0300 (Multiple engine misfire detected). Replaced the CMP sensor and left negative battery cable unhooked for 20 minutes or so to clear the codes. Upon start up no more SES light and idle was slightly better. Within seconds it SES was back and it is again running poorly. Cruise control is no longer functional as well.
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So I just had both cats replaced and now the car is running very rough and trowing out mis-fire codes. What could cause this? Going to disconnect the battery to reset the computer to see if that might work.
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I just bought a 05 1.8T Jetta 116,000miles. and need diagnosing it. It misses all the time. Has new plugs I tried two other sets of coils (from my 2.0 a4 and my dads passat) and it made no difference. The SAI was taken out but nothing is blocked off. Also the coil pack wiring harness has cracks on the big brown wire where it goes down along the block. I'm getting these codes on my vag-com.
16687 cylinder 3 misfire
16686 cylinder 2 misfire
16688 cylinder 4 misfire
17766 cylinder 2 open ignition circuit
17763 cylinder 1 open ignition circuit
17769 cylinder 3 open ignition circuit
17772 cylinder 4 open ignition circuit
So am I correct in thinking that it's from the cracked harness? An not a vac leak?
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I have a 2004 Jetta 1.8t 6speed, I recently bought it from a person(my first VW ever) so just trying to fix some things on it, One thing that I'm stuck at is My CEL, it keeps flashing the code P0501 and some random misfire on my cylinders, I have reset it and they keep coming back.
when I put about 10-15% throttle it revs up fine, no misfire or hesitation until the fuel gets cut off around 5500, which is 1k below factory red line, does not hit a thing like the rev limiter where it pegs off the top multiple times just fuel cuts off.
If i put anything above the said pressure the car then begins to misfire and lots of hesitation and that's what causes those codes to go off.
I've been reading many things pointing towards the engine speed sensor or the wiring. Occasionally my fuel/temp gauge quit working but I believe that is a separate issue all together.
So really trying to narrow down what is actually causing my engine to hesitate at low rpm.
Also i might note when I'm in neutral I can go wide open throttle and the car revs fine until the cutoff and only does the bog down when it's under full load. It sorta feels like the possible misfire is due to bad air/fuel but really do not know.
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2001 VR6 GTI....
Already done:
Replaced the coil pack and plugs
Measured resistance of plug wires (all at about 6K Ohm)
Replaced front O2 sensor
Replaced purge solenoid valve
Replaced coolant temp sensor
Replaced fuel filter
Replaced fuel pressure regulator
Replaced MAF sensor
Cleaned the throttle body
Cleaned the throttle position sensor
Ran a tank of seafoam treatment (injectors were new 6 mos ago.)
Checked running voltage of battery
It was smoking and stinking bad with a rich mixture. It improved with the MAF change but still runs like a farm tractor. Now it idles on 3 or 4 cylinders, runs rough through 3000 RPM then runs cleaner at above 3000 RPM, but only at light throttle. CEL is either on or flashing when driving.
Don't know what to do next - nice car not fun to drive like this. What this could be and how to test it?
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Toyota read the codes wrong and told me that I need a new hybrid battery. That is incorrect info. Codes P0300 P0301 P0302P0303. The codes mean misfire in cylinders 1 , 2 and 3. I have had injector cleaned in the past new spark plugs. If I drive it it gets warmed up and shuts down. It will restart and run maybe 7 more miles the same. The brake light comes on and I have to restart it.
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I recently had detected always misfire on those cylinders. Any relation between them?
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2007 Passat 2.0T ... I just purchased this vehicle and after about two weeks of driving it has gone bananas. I found a ton of oil in the spark plug holes, and installed a new valve cover gasket...It no longer leaks. I am getting P0171, P0507 codes and multiple misfire codes from all cylinders...
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My wife and I received her father's 2002 F150 4.2 5 speed 2 wheel drive truck after his passing. He purchased new plug wires and wanted to replace them. So, this weekend I put in new plugs, plug wires, changed the air filter, and changed the oil and filter. Started up and ran really rough. Threw my code reader on after taking it around the block and found the following codes...
P0316 Misfire detected in first 1000 revs,
P0302 Cylinder 2 misfire,
P0305 Cylinder 5 misfire,
P0306 Cylinder 6 misfire.
New plugs were Motorcraft plugs, but had skinnier center compared to the ones that came out of truck.
Where do I start? What do I do? I am really confused as I have changed plugs and wires before and always had vehicle run better or same as before change.
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Recently bought 98 f150 xlt 3 door 5speed 4x4 4.6l 230k miles for $1k was throwing misfire codes on 1,8,4,3 cylinders. Usually throws two cylinders at a time and never the same cylinders consecutively
Parts replaced:
coils...msd blaster
belden wire
motorcraft plugs...when i did these it ran perfect for a tank of fuel...18mpg no stumble
two cans seafoam through the tank
tank was dropped and drained
fuel filter
one can seafoam intake cleaner
3" exhaust from the Y pipe back
MAF cleaned
Previous owner said to have tested and cleaned injectors but I am not positive it was done... I don't think its mechanical because it wanders through the cylinders and when i changed the plugs it ran spot on. it gets worse the warmer the truck gets also.
injectors?
clogged small cats?
sensor?
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So recently I took my engine apart to do a valve cover gasket and Ecs tuning 2.0 coil conversion. I noticed a good amount of oil in the plug tubes so I got out my trusty soap dispenser and started pumping out oil. Pulled plugs and cleaned them (wanted to make sure oil was all out b4 getting new) also while I had it apart I wanted to take intake off, ( just to polish it and clean out any carbon inside).. Well I never ended up doing that. I removed the injector connections and realized it was to much work for such little satisfaction. So I plugged the injectors back in.
I got my car all back together and now I'm throwing 6 cel codes!! P0102 (maf) which I'm assuming b.c I took it off for so long, p0201, p0202 ( injector 1 and 2 miss), then some misfire codes p0300 (random) p0301 (cylinder 1) and p0304 (cylinder 4). The car starts runs very rough then cel comes on and blinks. I was thinking maybe the oil getting down to the combustion chamber couldn't be the best for it but it would just burn off. Only other thing I did was take off the thottle body and cleaned it.
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I am getting P0355 error code and potential misfire codes on all cylinders. Engine light and VSC stays on now. Idle is unstable and power is a little jerky at times. I bought a Denso direct ignition coil to replace, however, Cyl 5 looks difficult to access.
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I am getting the dreaded emission workshop.
The codes i am getting are p0301-p0304 and p0171
Which are misfire on 4 cylinders and system to lean (bank 1).
Here is what I have done:
Got the 4 ignition coils replace, replaced the mass air flow, replaced the air filter, replace the plugs.
I just check the L wire and it doesn't have any cracks or holes
I don't know what to do next.
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I do not know the 5.4l 3v as well as my last 360ci dodge. It's a 2005 F-150 SuperCrew 4x4, got it cheap, and it's got issues. Got codes for misfire on cylinders 4 and 5 and Coil 'D' circuit malfunction. Obviously it has codes for limited power as well. was wondering how cylinder numbering goes and what coil is 'D'.
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I bought a 2001 golf gls 1.8T (AWW) about a month ago and it was running pretty bad, was throwing some codes, cylinder 1 misfire and some o2 sensor codes, I replaced the coil packs and spark plugs and then cleaned the MAF. It was still running bad ,rough idle and power loss. I figured it had to be some kind of vacuum leak, I replaced the PCV valve, cleaned the intercooler and put on a silicon TIP. Still had some rough idle and power loss, checked for vacuum leaks, using the good ole starter fluid method and found my intake manifold was leaking so I replaced that gasket. STILL rough idle and power loss, now I'm pulling codes for o2 sensor and a misfire in cylinder 3. My question is, should I replace my pre-cat o2 sensor or replace my MAF sensor? Or are there other things that should also be checked/replace.
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So my girlfriends's 2001 2.0 Golf (engine code AVH, 153k miles) began throwing codes for misfire on cylinder 4 and for the o2 sensor (post-cat) recently. I went ahead and replaced the spark plugs, wireset, and the coil pack. They were way overdue. The CEL went away for like 30 miles, and then came back. Now it's reading misfire on cylinder 3 and the same thing for the o2 sensor. What else it could be? Search is coming up blank, most people replaced the coil pack and the CEL went away.
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I get some bucking under load between 1500 and 3000 rpm. This issue is more noticeable when the engine is warm. When it does this it makes a sound that to me sounds like a misfire from the exhaust, but I've never gotten a misfire code.
Sometimes i get codes p0411 and p0420 (secondary air injection and cat efficiency) but VCDS tests say my cat and o2 sensors are all good.
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