Hi. Ive got a astra f on a m plate at the moment fitted with a C14NZ single point injection engine.
The problem it has that im unable to cure is a flat spot when pulling away from idle, worse when pulling out of a junction e.t.c.
Ive done the following so far:
Checked for trouble codes with tech 1 (no codes stored)
Removed stepper motor, cleaned and refitted
Checked throttle body and inlet manifold gaskets for air leaks
Changed the fuel filter
Checked the CAT and exhaust system for blockages
Checked the dizzy cap and rotor arm
Changed the spark plugs.
Im hoping someone may have the answer !!