was8v 0 Posted June 23, 2006 Report Share Posted June 23, 2006 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 arcingany 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. Link to post Share on other sites
jonnyedinburgh 0 Posted June 24, 2006 Report Share Posted June 24, 2006 hi, how does the car sound/perform with 1 cylinder gone? Link to post Share on other sites
dellert 0 Posted June 24, 2006 Report Share Posted June 24, 2006 The coil packs on vr6 engines have got three coils. What happens is that each plug fires twice each cycle. Once on exhaust and once when it fires. Its called a redundant spark or something. So if it was the coil pack it would most likely miss on two cylinders not just the one. What you could try doing is swapping the lead on the coil pack with its twin. when looking at the coil pack you should see they are connected in three pairs. just swap top and bottom over. Also worth trying is tapping the injector with a screw driver, as they are simple solenoid valves. Had a intermittent fault on a Laguna. No faults in ecu. Tapped it with the handle of a screw driver while its running and it ran ok again for a while! Hope that helps. Link to post Share on other sites
was8v 0 Posted June 24, 2006 Author Report Share Posted June 24, 2006 hi' date=' how does the car sound/perform with 1 cylinder gone? [/quote']Sounds rough and like its missing and drives jerkily (unless at motorway speeds when i guess the momentum helps).delert - will try this now cheers. Link to post Share on other sites
was8v 0 Posted June 24, 2006 Author Report Share Posted June 24, 2006 What you could try doing is swapping the lead on the coil pack with its twin. when looking at the coil pack you should see they are connected in three pairsdone this' date=' same result, miss on one, however.....So if it was the coil pack it would most likely miss on two cylinders not just the one.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? Link to post Share on other sites
dellert 0 Posted June 24, 2006 Report Share Posted June 24, 2006 Sounds likely then. Soo hard to tell on a V6 how many are missing. On a 4 cyl engine if you lose more than one it would be totally undrivable. However it would seem totally reasonable that one of those coils could be faulty, which would give you a poor spark on two cylinders. Without proper testing gear i cant think what else you could try. Link to post Share on other sites
dellert 0 Posted June 24, 2006 Report Share Posted June 24, 2006 Theres one on ebay if youre not in a hurry and dont mind a gamble. Item no 220000462477. Like you said GSF ones cost ~£125. Link to post Share on other sites
apd 0 Posted June 25, 2006 Report Share Posted June 25, 2006 i would take the coilpack off and thoroughly examine it for cracks around 1 and 6 leads.super glue silicone repairs the cracks.sometimes cures the problem.if it doesnt i would buy a new coilpack! Link to post Share on other sites
VR6Pete 1,455 Posted June 25, 2006 Report Share Posted June 25, 2006 Has anyone tried the GSF coilpack, are they fine for VR6 supercharged applications, or is it sdvisable to purchase an OEM part.... Link to post Share on other sites
mightyvr6 0 Posted June 25, 2006 Report Share Posted June 25, 2006 I think the GSF coilpack is made by Beru which is an OEM manufacturer. Link to post Share on other sites
dellert 0 Posted June 25, 2006 Report Share Posted June 25, 2006 Currently using a GSF, Beru Coilpack on my unmodded VR6. No problems so far, been on for 6 months. Link to post Share on other sites
was8v 0 Posted June 25, 2006 Author Report Share Posted June 25, 2006 Right replacement coilpack on the way. I'll keep you all posted on the result.Thnaks again for the help people Link to post Share on other sites
VR6Pete 1,455 Posted June 25, 2006 Report Share Posted June 25, 2006 Best get one ordered from GSF! Pete Link to post Share on other sites
was8v 0 Posted June 28, 2006 Author Report Share Posted June 28, 2006 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. Link to post Share on other sites
dellert 0 Posted June 29, 2006 Report Share Posted June 29, 2006 No problem, main thing is its sorted. Link to post Share on other sites
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