vw trouble.

[konawel]

so about 2 weeks ago my girlfriends 01 gti vr6 started missfiring under heavy load and the epc light would come on along with the cel. after she did some research and used vagcom it was diagnosed as a coil pack. 2 days ago epc light and cel came on permanantley, and the bucket won't even move.. as soon as any throttle is given it dies. so far i've replaced plugs, wires, and coil pack. still running like ish. so i unplugged the mafs, and when i started the car it ran and i even drove it around the parking lot.. it still would missfire but only after half throttle or more. so i replaced the mafs.. just tried to drive it, back to square 1. i'm literally at the point where i'm ready to part the thing out. anybody have any input?

[clubken]

check vacuum leaks?

[Elliott18t]

have you checked fuses? Ive changed wire harnesses after a missfire because of a coilpack exploding.. Car ended up not starting after I replaced it. Turned out it was a fuse :banghead:

[konawel]

no vacuum leaks, and what fuses should i check?

[Elliott18t]

hmmm couldn't find anywhere for the fuses/relays to check.. however I constantly see its almost always the coil pack for this... even tiny cracks. Im sure you replaced it, but im just making sure because that was the answer in every thread.


http://forums.vwvortex.com/showthread.php?793322

http://forums.vwvortex.com/showthread.php?5187132&p=69931606&viewfull=1#post69931606


also, Ive seen - check your grounds.

[konawel]

i searched all vw forums, but it seemed everyone had a different solution to this somewhat common problem. i'm stumped

[Elliott18t]

Well i forwarded this thread to a friend of mine who knows a ton about VRs... maybe he will know.

[RedWabbit]

check your grounds on the engine/trans and under the battery tray. I had to scrap a mk3 jetta because I was never able to find the problem, these things can get aggravating.


and if it gets to the point of parting it out I could always use another vr6, but lets hope you figure it out.

[MattBear]

is this a drive by wire car?

if so, i'd scan the ECU, ABS, etc. check all of it and see what codes you have.

im actually working thru this **** with my vr now, tho i've pretty much gotten it pegged down.

I would try cleaning your MAF sensor, you can use 91%+ isopropyl alcohol, or CRC Maf Sensor Cleaner.

It is not uncommon for those cars to have bad throttle position sensors, and i believe i've read about the board going bad inside the pedal for drive by wire (if that applies).

actually, i just replaced my TPS on my vr6 and it fixed everything besides my operating temperature power loss (o2 sensor isnt reading right, corroded connector)


That would definitely cause your car to miss and the EPC light to illuminate, the maf can also trigger the same lights, and sometimes misfires.

[andru1313]

Did you replace all teh coil packs? Make sure you checked them all. And recheck them now. I have lost count on how many I have had to replace as well as the recalls on them.

did you replace the MAF with an OEM MAF? These cars don't like the ebay stuff.

[konawel]

i replaced the tps last night and still nothing, also the maf was replaced with an oem one yesterday. theres only one coil pack and that was changed, this was all done using oem parts. i'm throwing in the towel and probably sending it to vw solutions. for anyone thats still interested i'll keep an update. thanks!

[RedWabbit]

Did you replace all teh coil packs? Make sure you checked them all. And recheck them now. I have lost count on how many I have had to replace as well as the recalls on them.

did you replace the MAF with an OEM MAF? These cars don't like the ebay stuff.

this is a afp 12v vr6 not a 24v vr6. it only has 1 coil pack for all 6 plugs, unlike yours with coil on plug

[andru1313]

My bad I jumped the gun on my answer.

[MattBear]

SCAN THE CAR AGAIN please.

find someone local with vag com and get the codes cleared, then try to drive it, then rescan. then update, dont quit yet.

[BoostedRabbit]

any update on this? I've got vag com and am all around the lansdale, philadelphia, and lancaster area frequently. If you need a scan I'd be happy to help :thumbup:
It def needs a scan. post the codes.

[konawel]

A buddy of mine has the car, and believes he has traced it down to a vacuum leak.