My friends car missfires on cold starts when warming up, but once warm it only does it every now and then, also when turning left and putting foot down a little bit it will sometimes missfire as well. Engine is a RB25DE.
When cold start in cold mornings say foot is down 5% it wont do it but when at 25-75% it will just stutter, also idle at lights when stopped makes his car sound like it has lumpy cams and vibrates a bit? oh and the car is just generally slow when under these effects.
Any ideas? I thought it could just be spark plugs but not sure. (could be condensation in mornings or something?)
Thanks in advanced.