I HAVE A PETROL 1.6 . THE MOTOR RUNS AT IDLE BUT WILL NOT INCREASE REVS

1997 Opel Astra

Tiny

Douglas McConnell

February, 13, 2012 AT 7:07 PM

The problem started about 1 month ago and since then the car has stood idle. Petrol and air filters have been replaced.

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8 Answers

Tiny

fixitmr

February, 13, 2012 AT 7:11 PM

Any engine warning lights on? Take a fuel pressure test?

Tiny

fixitmr

February, 13, 2012 AT 7:20 PM

What happens when you try to increase throttle?

Tiny

Douglas McConnell

February, 14, 2012 AT 8:54 AM

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.

Tiny

fixitmr

February, 14, 2012 AT 8:26 PM

Is the throttle plate clean?

Tiny

Douglas McConnell

February, 15, 2012 AT 4:31 AM

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

Tiny

fixitmr

February, 15, 2012 AT 5:20 AM

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

Tiny

Douglas McConnell

February, 15, 2012 AT 4:51 PM

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.

Tiny

Douglas McConnell

February, 25, 2012 AT 7:20 PM

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.

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