Over the last couple of months i have developed an irregular problem with my C20let. it is a hesitation that appears from about 2500RPM to 3500RPM and can only be described as though the car is being held back as once the revs pass 3500Rpm the car goes like a rocket thorugh to the redline. the probelm has been abcent for a while until tonight on the way home. i wondered if any the following porblems could be causing it or if anyone can suggest something else.
1.The car started life as 1.6 16V the fuel pump remains the original
2. I took the car to a garage where they applied the 10K boost that i used to clear the car of any carbon etc. however when i got the car back i discovered thet had sprayed 10K thorugh airflow meter....i was little annoyed!!
3. The wastegate bush needs replacing on the turbo.
incidentially the problem started soon after (2). if this was the case and the AF meter was damaged would the car behave like this all the time?