Apologies for the short sentances but I'm at my wit's end with this. My VR is not firing on cylinder 1 - this only seems to happen when warmed up. Removed plugs, the plug from cylinder 1 is the only one wet with petrol. Swapped whole HT lead (new leads 4 months ago) with another and still plug 1 is wet. swap plug with a new one, still wet and missing. connect spare plug to lead on cylinder 1 and start car - runs the same (missing on cylinder 1 obviously) and plug connected to lead 1 is sparking away happily. Hook up to VAG com, no fault codes. Wait till dark and spray coilpack and lead with water and see no sign of arcing any ideas what is wrong?! I suspect coilpack - any other way of checking this apart from the water spray? Given that I get spark when the plug is out and there is no sign of arcing I dont really want to buy another (125). Any signs of a lack of compression on cylinder 1 to look for? Engine fouled up plug 1 over 3k miles on 10w40 oil, but still pulls like a train and ran great until this missfire. If the O2 sensor was out, I'd expect too much or too little fuel across all 6? I hear I have more chance of winning the lottery than a Vr6 injector failing.
Had similar problem with my VR and I changed leads and plugs,which improved things a bit, but it still gave the occasional misfire and was poor to idle when first starting on cold,damp days. New coilpack seems to have helped but still to wait for damper conditions.
a mate is having the same sort of problem with him . weird car . he can disconnect the battery for 1 min then re-connect it and it runs like a turd . then do exactly the same and it runs fine . a mate has had his vag.com on it and it won't talk to it . but yesterday mine did and it had no faults ! another strange thig is that the guages started to do funny thing like move al over the place .
my old vr sometimes used to do that but that was the coil pack as you could spray it at night and see sparks and here it clicking, the VR6 is great at masking running problems, would look at the injectors next. Perhaps swap then around or get them cleaned or checked
How do I test for this? surely it would be using loooooads of oil and plumes of blue smoke if they were knacked?
I had one today with the same prob - I'm a million miles from being a VR6 expert, but a dousing of the coil pack with WD40 (not the safest thing, I know) cleared it up instantly, so pinpointed the prob......
done this, same result, miss on one, however..... UPDATE: Out of curiosity when you said this I pulled no.6 plug (no.1's twin) and this was covered in petrol too, so must be missing on that cylinder too. Does this point to the coilpack then? Anything else I can try?
Cheers, I suspect its not a water ingress issue as its been dry for ageeeeeeeees and I can see no cracks in it but I'll give it a good spray as it worked for you.....
Still not going - Anyone know which cylinders share the same coils in a coilpack? (I thought it was 1 & 6).
coil pack fault if miss on 1&6 as they used the same section of the coil pack and spark at the same time (unless by some change the leads on 1 & 6 are damaged. if you have not put WD40 type stuff on the coil pack then check for light oil or damp area under the coil pack at one end as they leak causing the coil pack to reduce the spark to 1&6. if you are brave enough then while running remove the leads one by one and compare the strength of spark, 1&6 will prob have weak spark
Sorry what leaks? the actual coil pack? or something like the rocker cover? Will have a look later - i've sourced another working coilpack cheap to check, will report back. Cheers for all the help everyone!
Right replacement coilpack on the way. I'll keep you all posted on the result. Thnaks again for the help people
Got another coilpack and it's running fine, thanks to all for the help. Was no evidence whatsover of damage or leakage from the coilpack, looked fine from the outside. Cylinders 1 and 6 definatly share a coil in the pack, 3 and 4, 5 and 2.
