chrismiddi

1993 Classic turbo, import. when pressing on hitting 5K+ it starts to stutter and engine light comes on. After some less spirited driving the engine light goes out. I will drive the car and do the diagnostic 2moro but was wondering what the likely cause could be.
Knock sensor detecting knock then retarding the ignition?
Coil packs/Leads/Plugs breaking down?

The car has been chipped (was like it when the car was purchased) has a full 3" exhaust and -22 actuator. Could this sh7tty chip be the cause of the probs. The car runs 1.0 bar max.

I have looked on here about how to put the car into diagnostic mode and i believe its just a case of putting the two black connectors togther under the dash?

Any ideas much appreciated!

Gidney&Knowlesy

Best guess would be plugs first, then coil packs

chrismiddi

it is showing up fault codes

24- idle air control solenoid
31- throttle position sensor
33- vehicle speed sensor
45- pressure sensor- pressure exchange solenoid valve

any ideas where to start looking to stop these fault codes appearing?