hello I have a petrol 1.6 astra 1997. The motor runs at idle but will not increase revs

any engine warning lights on? take a fuel pressure test?

what happens when you try to increase throttle?

Hello thanks for the response to my question. No warning lights on and when I open the throttle the revs stay the same, however this morning whilst fiddling I removed the wire to the (acceleration sensor) I think, and after plugging and unplugging this a few times the revs came up but the idle stayed high. Once switched off back to the same.

is the throttle plate clean?

I will strip today and check thanks, I have wiped in there and quite a bit of dirt was on the rag.

when you said 'open throttle' did you mean move throttle plate? do we know if it's responding to pedal?

Hi the throttle plate responds, I did a complete strip and washed out the throttle plate and complete unit. I refitted using a new stepper motor Idle unit and managed to get the motor running. The revs took a while to pick up but then the idle was fine. I took a run for about 20 kms and all was fine except a little flat until the revs were up. I have ordered a Tps (Throttle position sensor) and when that arrives in the morning I will fit it and see. Thanks again, appreciated.

Hello all the fault was with my crank gear. Key way on shaft was partially stripped. Replacement gear was R100 and car revved up normally.
Thanks forthe advice.