I have an R33 GTS-T that has just developed a mis occuring at around the 5500rpm mark. It is not constant in every gear but is a common enough problem to cause concern.
I have changed the plugs and re-gapped them to no avail.
I am thinking it may be the fuel pump starting to die on me? How do I test it?
The car has a full 3 inch exhaust, aftermarket BOV, K&N Pod filter, FMIC. It is running standard boost at the moment, when I crank it the mis is more noticable.
Please help.