Tiggsy Posted April 30, 2009 Report Posted April 30, 2009 My 2.8 V6 is running VERY rough all of a sudden.....vibrates through the engine at revs under 3k - i assume its firing on 5 cylinders and i'm hoping thats an easy fix with new plugs (i had it do this a couple of yrs ago and Ford fixed it) Credit crunch etc so i'm wanting to do the work DIY! Had a look though and how easy it is - the plugs have plastic caps on which i cant figure out how to remove ....and even if i do is it a simple job? Unscrew old plug, put in new plug? Quote
seatkid Posted April 30, 2009 Report Posted April 30, 2009 Dont run it around on 5 cylinders unless you want to buy a new Catalytic Convertor Quote
pat19581 Posted April 30, 2009 Report Posted April 30, 2009 you have to have the tool to get the spark plug leads out it part number 021012213 from a vw dealer its a long plastic thing 14 pounds got one today Quote
Tiggsy Posted May 1, 2009 Author Report Posted May 1, 2009 you have to have the tool to get the spark plug leads out it part number 021012213 from a vw dealer its a long plastic thing 14 pounds got one today So should ijust go and replace the leads and coil pack or should i (can i?) check they are the fault first - and should i do plugs while i'm at it....ie. are these are wearing parts that its good to swap out anyway or might i be spending lots of money (leads seem pricey!) when i dont need to? Mark Quote
sepulchrave Posted May 1, 2009 Report Posted May 1, 2009 Yes, you must replace the spark plugs regularly in this engine. Yes, you'll almost certainly need new leads if they haven't been replaced recently. If the above doesn't fix the problem then Yes, you'll need a new coil pack as well. The cost of these parts bears no relationship to the necessity of replacing them! I wrote an extensive post on resolving this exact problem but it didn't get stickied (because it's nothing to do with diesels) , so use the search function. I predict there will be a time in the not too distant future when the vast majority of owners of older cars posting on this forum will have the VR6 petrol variant, all the other engine types having long since popped expensively. :lol: Quote
gregers Posted May 1, 2009 Report Posted May 1, 2009 Yes, you must replace the spark plugs regularly in this engine. Yes, you'll almost certainly need new leads if they haven't been replaced recently. If the above doesn't fix the problem then Yes, you'll need a new coil pack as well. The cost of these parts bears no relationship to the necessity of replacing them! I wrote an extensive post on resolving this exact problem but it didn't get stickied (because it's nothing to do with diesels) , so use the search function. I predict there will be a time in the not too distant future when the vast majority of owners of older cars posting on this forum will have the VR6 petrol variant, all the other engine types having long since popped expensively. :lol: hi sepulchrave i have pm nik,to see if what you have posted in the past should be added to the faqs,perhaps you could find it and let us know?im sure it was an oversite. :lol: Quote
Tiggsy Posted May 2, 2009 Author Report Posted May 2, 2009 is it an easy enough DIY job? Looking under the bonnet the HT leads seem to leave the plugs then join a loom the seems to split off all over the place.......is putting in new leads easy? it looks mad! Quote
Tiggsy Posted May 3, 2009 Author Report Posted May 3, 2009 its a 2002....just realised it's the engine with a coil per plug...in which case, where the heck are the wires? I'd assumed they were the wires that are attached to each coil/plug....but i guess not? Quote
seatkid Posted May 3, 2009 Report Posted May 3, 2009 its a 2002....just realised it's the engine with a coil per plug...in which case, where the heck are the wires? I'd assumed they were the wires that are attached to each coil/plug....but i guess not?Individual coilpaks are the bits that sits directly on the plugs there is no HT lead. Just a low voltage plug/loom that connects to each coilpak. They look something like this:- VW had a recall on early (2002/2003) engines as a lot of paks were popping. Chances are one of yours has gone - they dont seem to like feeding spark plugs that have gone past their replace by date (the gap gets too large and the extra voltage reqd to spark pops the pak). You can check by pulling the low volt lead of each pak in turn and start the car briefly to see if it is worse. If not then you found the fauty pak/plug, if yes then replace lead and try the next one. You can get a tool to pull the paks out but those I've tried (not a V6 mind) just need careful screwdriver leverage and a good tug to pull out. You WILL need a proper spark plug wrench to get the plugs out (GSF do excellent ones at about Quote
Paul B Posted May 8, 2009 Report Posted May 8, 2009 Unbelievable! I too have been trying to cure this exact same fault for weeks now. I have spent nearly Quote
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