drysd4le Posted April 6, 2015 Share Posted April 6, 2015 Hi guys, I have recently had an absolute nightmare with my Z, it has developed an erratic idle/misfire that comes and goes, but seems to clear if you give the car a good blast. I have changed plugs so far, which made a small difference, but it still seems to come back, I'm thinking coil packs next, but I am a bit concerned that when I changed the plugs, there was oil in two of the plug wells, cam gasket, or even worse head gasket? Any help or advice would really be appreciated, it's starting to get really annoying. Quote Link to comment Share on other sites More sharing options...
ioneabee Posted April 6, 2015 Share Posted April 6, 2015 moved - your pics and sig suggest a 350 not a 370 Quote Link to comment Share on other sites More sharing options...
drysd4le Posted April 6, 2015 Author Share Posted April 6, 2015 Sorry, just realised where I had posted it! My mistake. Quote Link to comment Share on other sites More sharing options...
glrnet Posted April 6, 2015 Share Posted April 6, 2015 Have you had a code reader on it? Quote Link to comment Share on other sites More sharing options...
Ricey Posted April 6, 2015 Share Posted April 6, 2015 Cam cover gaskets are quite common to fail. Erratic idle will be a process of elimination if the car isn't throwing an EML but a good diagnostic as Graham said will help. Ideally when it's idling erratically you want to pull each coil pack in turn.....if he engine idles worse then it's a good coil. If there is no change then you may have found your dodgy coil. Quote Link to comment Share on other sites More sharing options...
drysd4le Posted April 6, 2015 Author Share Posted April 6, 2015 Hi, cheers guys, I have had my reader on it and got two codes, P0300 random/multiple misfire I believe, and also a misfire on cylinder 1, my problem is that when I pull coil form cylinder 1 misfire gets worse! Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted April 6, 2015 Share Posted April 6, 2015 If its a coil pack, they will most likely show up most under load IE when cylinder pressures are highest, so unless a code is stored, you really need to live monitor them. Quote Link to comment Share on other sites More sharing options...
thedon Posted April 7, 2015 Share Posted April 7, 2015 (edited) Re the oil in your spark plug wells, check out this recent thread. I've just found the same thing in cyl 6 and having done some reading it's a common problem with DE engines. I've decided to go for the grommet repair kit from Adrian at Torqen rather than a more expensive cam cover - £139 will repair up to all 6 spark plug chamber grommets. Good luck, Howard Edited April 7, 2015 by thedon Quote Link to comment Share on other sites More sharing options...
thedon Posted April 7, 2015 Share Posted April 7, 2015 PS. I have a spare (used) coil pack if you'd like me to pop one in the post. Quote Link to comment Share on other sites More sharing options...
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