Quote:
Originally Posted by Tm135i
Thanks for your reply,
I think I’m going to try changing the coils and see if that helps, if not then I might take the map off the car and go from there.
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i don't think its the coils. These tend to fail under high load rather than at idle and you'd get misfire fault codes.
Check the coil connectors are pushed in firmly.
I never had any DTCs. I have come to the conclusion that the new map is slightly underfuelling at idle because it also hesitates / jerks very slightly when setting off from rest even when at operating temperature unless I use more revs.
Mine will run okay with the maf sensor unplugged and this does cure the issues but I've never driven it for more than a couple of miles with it unplugged. (I did change the maf and precat O2 sensor when I bought the car as the tailpipe looked like an old diesel's and mpg was poor.)