pulling my hair out

[sideshowstimp]

wondering if anyone can help? my car was showing up fault code 64 have had a brand new alternator fitted 4 pin ( car is a 95 gpx) and the problem is still occuring. The problem being when warm it wont rev past 2-2500 revs when under load but will in park or neutral. i have also just replaced plugs (all six) and leads also new exhaust and some welding, am so keen to get the car on the road with some mivec style please can anyone help??

[CJ]

Reset the ECU and try another diagnostic to check if any other sensors are showing faults...

CJ

[sideshowstimp]

thanx cj, went back to my mechanic today and he hadn't finished the mot work and the rear wheel was off doing brake pads hence he hadn't taken car out today to check for fault codes. he promised to check tomorrow but is only earthing the pin not proper diagnostic reader (would a proper reader give me a more comprehensive reading of problem?) this guy is really slow and im doing all the home work lots of thanx to you guys and ur site. hopefully have code tomorrow thanx again
stimpy

[sideshowstimp]

so have spoken to mechanic and the car is now showing no fault codes but still has same problem, he is going to change fuel filter and is talking about fuel pump has anyone any ideas please
stimp

[Dave1971]

I have a similar problem, but while won`t rev past 4000rpm. Am thinking it might be the ECU that is at fault, because i have changed all of the components related with the issue.

I have a cheap fuel pump if you wanted it, £20 delivered.