Lumpzta 1 Posted February 2, 2014 Report Share Posted February 2, 2014 hope someone can shed some light on this. when the car gets to operating temps I get a sputter/misfire when I rev from idle up to about 1.5k revs. This doesn't do ths when engine is cold. I have replaced very recently the following parts.coilpackdizzy caprotor armfuel filterlambda sensorbatteryidle air control valverelaystook out plugs and gave them a good clean.im guessing its something ti do with open/closed loops, hence the reason it happening only when warm? could it possibly coolant temp sensor and would this cause the problems im having ? ive just ordered a genuine coolant temp sensor so will try it but im running out of solutions to solving the problem.any help much appreciated cheers guys. Link to post Share on other sites
Lumpzta 1 Posted February 6, 2014 Author Report Share Posted February 6, 2014 well that was a PITA to find this problem but think ive finally found the cause. the bit of pipe that joins the 2 exhaust manifolds together is leaking so one can assume that the lambda is picking up more oxygen in the exhaust , so that is telling the ecu to dump more fuel in to compensate the extra oxygen, hence the lean misfire when warm.just need to try seal it at the weekend ? any ideas on how I could seal the little nuts on the exhaust manifold the the joining pipes go into? cheers VR6Pete 1 Link to post Share on other sites
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