Vauxhall Astra G Petrol (1998 - 2004) - 01 1.6 Auto, juddering and cutting out

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Mon 17 Nov 2008 19:33
01 1.6 Auto, juddering and cutting out - BlueCanary
Our rev counter hovers between 7500-12000 when we first start up but, once the engine warms up, goes down to 7500. When we are on the move, it drives fine but, when we are at junctions/traffic lights in drive, it hovers below 7500. When we knock it into neutral it reads 7500 again. When we drive around town/short trips, the car is fine but, when we're on the dual carriageway, after about 10/20 mins. it starts to judder. If we have to slow down by braking, the car will cut out for no reason. We have one rubber belt that looks as though it drives the engine (auxillary belt with a tensioner pulley?). We've found that through the Haynes Manual, but we can't make proper sense of it! The belt does look shiney and it does move. Is that what the problem is?

Edited by Pugugly on 18/11/2008 at 21:35

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Mon 17 Nov 2008 19:48
01 1.6 Auto Astra Club - Juddering and cutting out - Andrew Moorey (Tune-Up)
Not knowing which engine you have in your car I'd have to guess you have a problem with the idle speed control stepper motor. The engine should start from cold and hold revs steady a little more than 1000 rpm then drop to around 850-950. When D or R are selected the revs may momentarily dip slightly then return to normal. If the motor has a fault or the throttle venturi is sludged up due to blocked breathers then it wont idle correctly.
My suggestion is find a recommended independant garage or mobile mechanic and entrust them to carry out a proper diagnosis. They will also be able to advise on your auxiliary belt concerns.
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Mon 17 Nov 2008 23:20
01 1.6 Auto Astra Club - Juddering and cutting out - topbloke
sounds like classic egr fault to me dealer maybe able to reprogram ecu to tell it that its not fitted unless its an auto if it is then a new egr valve will be required but you need to go to a garage to get them to check it out properly i guess its a typo but i think you mean 750/1200

Edited by topbloke on 17/11/2008 at 23:21

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Mon 17 Nov 2008 23:48
01 1.6 Auto Astra Club - Juddering and cutting out - rtj70
He obviouslt means 750/1200 unless it's an F1 car or similar. Thread title says 1.6 Auto from 01 (so a Y/51 plate).
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