bradleyh_15 Posted July 23, 2008 Share Posted July 23, 2008 can anyone help? i had a miss fire around 5000rpm so changed the spark plugs and it went away for 2 days now its back! when i changed the plugs the 2 from nearer the bulk head had alot of oil on them! Does any one have any ideas of what might be wrong? Quote Link to comment Share on other sites More sharing options...
AndyT Posted July 23, 2008 Share Posted July 23, 2008 Coil packs maybe. Member had same issue the other day and it was these. Also check the ht leads. Edit. http://www.mkivsupra.net/vbb/showthread.php?t=156308&highlight=misfire Quote Link to comment Share on other sites More sharing options...
bradleyh_15 Posted July 23, 2008 Author Share Posted July 23, 2008 just been looking for some coil packs on the net and found some for £25 pluss p&p! Bit cheep? Quote Link to comment Share on other sites More sharing options...
Scott Posted July 23, 2008 Share Posted July 23, 2008 It was actually the coil pack clips on mine. I can't be sure but i think a missfire is less likely to be down to coil packs and more likely to be the clips or the HT leads. If the coilpack was fubarred i think you would only run on 5 cylinders and it would idle really roughly like mine was. Turned out one of my clips was totally done in so i changed all 6 and that seemed to sort it For around £30 you can change them all so its worthwhile. £25 sounds a bit cheap for a coil pack. Where is that from? Quote Link to comment Share on other sites More sharing options...
TurboBrett Posted July 23, 2008 Share Posted July 23, 2008 can anyone help? i had a miss fire around 5000rpm so changed the spark plugs and it went away for 2 days now its back! when i changed the plugs the 2 from nearer the bulk head had alot of oil on them! Does any one have any ideas of what might be wrong? is it bang up 5000rpm or is it at a boost level.. say 6psi+...if it is boost related its more likely it will be down to the spark, if it is an exactly 5000rpm every time (personaly) i would be looking at the air fuel ratio Quote Link to comment Share on other sites More sharing options...
bradleyh_15 Posted July 25, 2008 Author Share Posted July 25, 2008 It was actually the coil pack clips on mine. I can't be sure but i think a missfire is less likely to be down to coil packs and more likely to be the clips or the HT leads. If the coilpack was fubarred i think you would only run on 5 cylinders and it would idle really roughly like mine was. Turned out one of my clips was totally done in so i changed all 6 and that seemed to sort it For around £30 you can change them all so its worthwhile. £25 sounds a bit cheap for a coil pack. Where is that from? from a site called suprabits.com! I think ill go with the option of changing the HT leads and coil packs and clips will cover all options then! Any ideas of wich ones are best? Quote Link to comment Share on other sites More sharing options...
bradleyh_15 Posted July 25, 2008 Author Share Posted July 25, 2008 is it bang up 5000rpm or is it at a boost level.. say 6psi+...if it is boost related its more likely it will be down to the spark, if it is an exactly 5000rpm every time (personaly) i would be looking at the air fuel ratio its not exactly it mainly happens around 5000rpm but varies and only seams to happen from 3rd gear!? Quote Link to comment Share on other sites More sharing options...
Scott Posted July 25, 2008 Share Posted July 25, 2008 from a site called suprabits.com! I think ill go with the option of changing the HT leads and coil packs and clips will cover all options then! Any ideas of wich ones are best? To be honest i would try and save money by going with the coilpack clips first. Its the cheapest and usually the most likely fix. After that its the coilpacks as far as i know. The HT leads look pretty difficult to change in the sup, when i was looking at it i had no idea how to take them out without either cutting and shutting or replacing the whole loom. I have no idea on this though as i gave up, any info you get pass my way as i fancied doing it too. Basically, go for the cheapest option first. A lot of members have had unbelievable success just changing the clips. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 25, 2008 Share Posted July 25, 2008 A TT doesn't even HAVE any HT leads.... Quote Link to comment Share on other sites More sharing options...
Scott Posted July 25, 2008 Share Posted July 25, 2008 that'll be why then lol. What does ht stand for and what are the coilpack leads called in a tt? I didn't think they were ht leads because there was no distributor but i thought i was being daft lol. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 25, 2008 Share Posted July 25, 2008 Coil pack leads are part of the engine loom, and called, err, coil pack leads HT stands for High tension, as in the leads that carry the spark plug voltage. Only the N/A's have them, as they run a distributor. Quote Link to comment Share on other sites More sharing options...
Dan8 Posted July 26, 2008 Share Posted July 26, 2008 i had this with my n a found it to be the coolant hose that goes accross the rocker covers at the back near the bottom of windscreen where the hoses have a join in can leak water when reaches temperature slightly and drip right into the last 2 sparkplugs Quote Link to comment Share on other sites More sharing options...
Jim_1979 Posted July 26, 2008 Share Posted July 26, 2008 Hey guys, I'm gonna jump in on this thread. My car runs fine at 0.8bar , but at 1.2bar there's a lot of misfire/hesitation under boost. I just changed the plugs today hoping it would cure it. Nope. I've just bought some coil pack clips from envy performance on the good old 'bay after reading the above advice. Should this solve the issue? Quote Link to comment Share on other sites More sharing options...
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