Golf IV / Jetta IV :: Engine Keeps Misfiring
I am having a recurring problem, My engine keeps misfiring. I have replaced the spark plugs, ignition coils and pcv valve with all new parts and and fixed it for a little bit but now my car is misfiring again, and Im hoping its not the head so need to narrow down what the problem is...
View 1 RepliesGolf IV / Jetta IV :: Won't Start - Misfiring - CEL Came On?
So leading up to today ive had some bucking under load which felt like misfiring to me. I borrowed my friends VCDS cable, checked MAF, checked o2 sensors, checked cat. They are all good. This problem is constant but i did get a misfire code once (random, cyl 1, 2, and 3). I cleared the code and they never came back.
Today as im driving home from work, the bucking problem was much worse. Then the CEL came on. I just checked the code, and it was system too lean. I cleared the code and now the car will not start. It cranks, shows rpm on VCDS and sputters but doesnt even come close to starting.
Golf IV / Jetta IV :: 1995 - CEL On - Misfiring?
1995.5 Jetta VR6
Misfire cylinder 1 and random misfiring
P300 P301 Vagged it and can't figure it out
Changed the plugs, wires, and coil pack Used and old timing light and getting spark in all wires so can't be the coil pack
Fuel injector, O2 sensor, any other things?
Golf IV / Jetta IV :: CEL Flashing Saying Cylinder One Is Misfiring
I have a 2001 golf with a 2.0 AVH engine. I recently replaced the coil-pack and was very pleased that the engine was running better, the only problem was the mpg was still kinda low in the 24-5 range when it used to be 29.
I tried to do a compression test but I didn't prepare properly, I thought you left the coil pack plugged in and the fuel fuse. Now I have a CEL that *was* flashing saying cylinder one is misfiring though it has stopped flashing. I drove it 13 miles home and it did improve but its still running rough. Very reminiscent of when my bad coil pack was still in there, a real lack of power.
So I have to ask, what can I do from here? Have I damaged my coil pack or cylinders? Will this likely go away on its own? Is there anything I should do?
Golf IV / Jetta IV :: 1.8T - Misfiring Cylinders With EPC Light
Is it possible that disconnecting battery causes a misaligned throttle body, which in turn causes the EPC light to come on? And does a misaligned throttle body also cause misfiring cylinders (1 & 2 in this case)?
View 3 RepliesGolf IV / Jetta IV :: 2000 VW VR6 Misfiring In Cylinder 1
I recently bought a 2000 jetta vr6 MK4 and since i have had it its had a misfire problem. So its saying that its misfiring in "cylinder 1" and sometimes when I clear the code it will stay off for the whole day. I did everything I could think of. I replaced all the spark plugs. I replaces the plug wires. Then i bought I new coilpack. and its still misfiring.
View 10 RepliesGolf IV / Jetta IV :: 2004 - CEL Came On - Cylinder 2 Misfiring
CEL came on and the report says #2 cylinder misfiring. Changed plugs, wires and coil. Last step was to change the #2 fuel injector. I changed the 2nd injector from the left but I'm still getting the same message. I was wondering if maybe they aren't numbered that way. It's a 2004 Jetta with Car engine: 2.0L L4 SOHC 8V. Did I change the wrong injector?
View 1 RepliesGolf IV / Jetta IV :: Car Seems Like Under Load Or Lots Of Gas
2003 Jetta 1.8T (Manual Transmission)
It does this while driving. Seems like when the car is under load or lots of gas driving there is no sound, but when less gas pedal like coasting it makes this sound.
Car has leaking turbo seal. And bad catalytic converter.
Golf IV / Jetta IV :: 2004 - All 4 Cylinders Misfiring Randomly
So I have a 2004 jetta GLI (1.8T) with forge splitter valve and short ram intake. I went and got my codes pulled and all 4 cylinders misfiring and random misfires. I replaced both coil packs and spark plugs. check engine light popped up again after about 20 miles and same thing. I just bought the car so I'm not sure how long it has been running with these misfires. I just got the timing belt replaced. I know it could be off a tooth. (Wouldn't a code pop up though for it?) How could I check that. And I also took my MAF sensor off as well and no change. Heard it could be clogged cat, any way to check? I've also cleaned the throttle body. It runs fine when I'm driving, just a rough idle.
View 15 RepliesGolf IV / Jetta IV :: Major Temporary Misfiring When Warming Up
2002 Jetta 1.8t, auto tranny, 90K miles. Recently took it in and had all coilpacks replaced under VW's recall.
Sometimes when it's been sitting out in cool air for a long time (in Texas summers, this is nights-only), about 3 miles in it suddenly starts misfiring- BAD. Check Engine light comes on. Lasts about 30 sec, then goes away and doesn't come back for the rest of the drive. WTF?? I can't make it happen on queue.
I heard about the all-too-common grounding problem on the engine harness. I did find a significant resistance between the ring terminal on the head and the battery (-). I tied the 3 ground posts under the battery together with 12ga wire and crimped terminals, and ran another 12 ga wire up to the engine block ground right under the ring terminal that grounds the coils, which should have shorted past any weak spot on the harness. PROBLEM STILL OCCURS!
Scans showed:
17766 Cylinder 2 Ignition Circuit: Open Circuit
16682 Cylinder 2 Misfire Detected
16684 Random/Multiple Cylinder Misfire Detected
17658 Low Fuel light (only ~3 miles after lighting the Low Fuel warning, I don't think the fuel pump's running dry just yet here)
Seems to focus on Coil 2. But last time I did this I got these errors for Coil 3 and swapped it for a new replacement I had in the trunk in case one went out unexpected. Well now it just says Cylinder 2. Just did it again tonight after clearing codes and got these same Cylinder 2 errors again.
Actually I started to wonder... I've been running the tank close to the "low fuel" light to check my actual mpg usage (no display for it in my MK IV), but fill back up a few miles after it lights. I can think of a couple of spots on the late-night drive back that I see this, one's after a hill which might cause a fuel pump to run dry temporarily, but another's a light downhill then up a light offramp. I don't think the tank's been low every time this happened but I'm not sure. Well, a couple of times it's been mostly level in the parking lot anyhow and misfired a bit right off the bat when starting, so probably not.
Wouldn't there be some sort of "low fuel pressure" code if fuel starvation was actually the issue going on? Hmm, I went looking and I'm not sure there is one for a MkIV, there's errors for fuel trim but I don't think you get those in short-term. This is kinda scary how it just goes out while driving, and I can't do much to reproduce it or test out fixes.
So looking further, other people report what may be intermittent fuel pump issues when the tank goes low. But could that result in "Cylinder 2 Ignition Circuit: Open Circuit"? I mean the coils will still electrically read as firing. Of course if the system gets all glitch-y, the software may be making a mistake somewhere and report this wrongly.
Golf IV / Jetta IV :: 1.8t - Bogged Down And Misfiring When Go Into High Boost
I'm having a misfire issue on my 1.8t. When I go into high boost I'm getting bogged down and misfiring.
I plugged in my obd2 adapter and it gave me a misfire on cylinder 3. I since cleared the code to try and see if it was a coil pack by switching it to another cylinder, but now the cel won't come back on although the problem persists.
I have recently changed the plugs and the car was fine. I then added a fuel injector treatment and the misfire started shortly afterwards. (coincidence perhaps). It's frustrating as I can't rule out coil packs as my cel won't come back on and my code reader is not displaying any faults.
I did previously have a cel with something about fuel trim bank 3? I am also sure I have a boost leak as the car whistles pretty loud under boost.
Also worth mentioning I have a bit of white smoke sometimes but I'm not using oil or coolant and they are not mixing either. I'm at the end of my tether with this car and just want to try get it back to normal.
Golf IV / Jetta IV :: Misfiring / Rough Acceleration When Cold Outside
Firstly, my car is a 2001 with a 1.8T, 5 speed manual. It has APR's 93 with the mode-switching software, a FMIC, a short ram air intake, the SAI delete and the original DV (used to be a Forge 007). I bought the car in 2008 and it didn't have this problem until the following winter, sold it in 2012 and recently bought it back from the guy I sold it to.
My car will start and idle great, and accelerate through first gear without problem. In second and third gear, when it hits around 3000 RPM, it just suddenly starts to sputter and run like crap and not get any kind of boost. Fourth and fifth gear, I can run it until it peaks and it'll never miss a beat. It only does this when it gets cold outside (sub-30 degrees) and is perfectly fine the other nine months out of the year. I usually don't drive it in the winter if it's avoidable, but I have to travel a lot this year and would like to drive it instead of my truck.
In the past few years/15K miles, I've replaced:
- All four coilpacks
- All new spark plugs
- New coilpack harnesses
- Catalytic Converter
- Throttle body (twice)
- Diverter valve (back to stock, other owner did it)
- SAI delete (other owner did it)
- Fuel Filter
- O2 sensor
- ECU (the factory one got shorted and had to be replaced back in '08)
I've also gone through and checked every vacuum line and can't find any leaks (including spray testing). My CEL is on due to the SAI delete. I've tried it in both the stock and APR mode and it doesn't make a difference.
Golf IV / Jetta IV :: Again Cylinder Misfiring - Flashing MIL Light?
So a few days ago my engine developed a misfire, flashing MIL light etc...long story short it was cylinder 5's ignition coil. When we scanned it, we picked up a misfire on cylinder 5, and a slight misfire on cylinder 1. Replaced the coil, as well as new spark plugs, cleared the codes, and everything was peachy.
NOW, driving home today.....once again. Misfire, MIL light etc. I'm not a mechanic so I am wondering if it is common for all the coils to go around the same time, or if this is probably just cylinder 1 now going. I'm going to once again get it scanned, but before then...is there anything that could cause ignition coils to just start going bad, other than age.
Golf IV / Jetta IV :: Shimmies Back And Forth Under Load
Under load, the car shimmies back and forth. Left to right. But only under load. It will even do it in 5th gear at 1500 rpm. The problem goes away when foot off the gas, or in neutral.
Already did a drivers side axle, passenger side axle, and dog bone mount.
I removed the intake to inspect the transmission mount and this is what I found below. Should it be able to wiggle this much? I imagine the mount is original to the car. Which has 156,000 on it currently.
Passat (B6) :: Hesitation And Misfiring Only During Heavy Load
I have a 2008 Passat Komfort Wagon with the 2.0T. At 40,000 miles, yes it only has 40,000 miles, the thing started hesitating and misfiring on me only during heavy load. I ran the codes and it said #4 cylinder misfire. The check engine light was only on during the time it was misfiring and hesitating. Took it to the VW dealer to have them run it again and get guidance and they verified the #4. When I picked up the car the CEL was illuminated. They said it does it when it misfires. I explained that it was not on when I dropped it off and they basically said tough cookies. So I replaced the #4 coil pack and all 4 plugs. CEL light still on, but wasn't misfiring. Next day it began misfiring again under heavy load. Took to Autozone to run the codes and now says misfiring on all cylinders.
View 6 RepliesGolf IV / Jetta IV :: 2002 GLX V6 Misfiring When Cold - CEL With Cam Sensor Code
I just got this car it a 2002 jetta glx vr6 12v 5 spleed. It has a miss new plugs wires gas and used coil pack. It misses especially when cold check engine light on says cam sensor changed it and still same thing if I clear the code it comes right back.
View 1 RepliesGolf IV / Jetta IV :: Misfiring After Valve Cover Gasket Replacement
I did a valve cover gasket replacement. Changed all spark plugs and coilpacks. The car is still misfiring. I also just did the timing belt and water pump. Why it's still misfiring?? I'm new to this whole forum thing so bear with me lol. I'm wondering if it would be my cat, fuel pump, fuel filter. Or could it be a sensor?
View 2 RepliesGolf IV / Jetta IV :: 2004 GLI Randomly Misfiring After Exiting The Freeway
2004 gli , 1.8t , 136k , 6 speed
The car started misfiring after exiting the freeway, at the light it felt like it was gonna cut off. The brake pedal is stiff like the car is off. When it's idling is when it's most noticeable. It smoothed out after 2nd gear at like 35mph but still not right. The pedal thing has never happened before but I knew the sputtering was the coils, so I had it scanned and sure enough. 5 codes.random misfire.. random misfire all four cylinders.. so I bought 4 and replaced the old ones.. Changed the Sparks as well. No change.. The cel came back on..still idling rough.. What it could be.
Golf IV / Jetta IV :: 2000 - Bogs Under Acceleration - Cylinders Misfiring?
My friend has 2000 12v vr6 auto and recently he experienced his car bogging under acceleration. He had the plugs and wires recently done to solve the problem and the problem went away for a day and has since returned. I scanned it and here are the codes that its threw. After doing some research i'm thinking its the coil pack, since it was pretty foggy/damp today (when the problem started again).
17626.p1218 - fuel injector for cylinder 6 (N84): short to b+
16690.p0306 - Cylinder 6 Misfire Detected
16684.p0300 - Random/Multiple Cylinder Misfire Detected