Mechanics

CAR HESITATING AND STALLING AT 3000-3500 RPM

2002 Vauxhall Astra • 86,000 miles

My Vauxhall Astra 1.6 SXi 52 reg hesitates and****** when RPM are over 3000, irrelevent of speed. This is mainly when motorway driving, the car will***** but not backfire and if I lift of the gas for example when coming off a junction the car will***** violently and if revs drop as in when gear down changes it will stall, no warning lights are on until engine stalls.
I have changed the spark plugs and garage have looked at it but without a warning light they are unsure of problem. I have had 2 EGR valve changes in past and it does not seem like that as hesitation is only when RPM hits 3000-3500 rather than constant. Cambelt was changed with waterpump in August 2011 and I have had new rear and middle exhaust replaced in October 2011. This happens whether engine is cold or at running temp. Help appreciated.
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Rob906
January 21, 2012.




Where is the redline for that engine? Have it scanned for codes.

Rivermikerat
Jan 22, 2012.
The redline is 6000. I am thinking of getting it plugged in for diagnostic but wanted a heads up on probable issue. Thanks

Tiny
Rob906
Jan 22, 2012.
It could be a throttle position sensor or a idle air control valve.
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Rivermikerat
Jan 23, 2012.
Just an update, I had a diagnostic and it was found to be the EGR valve sticking open so when I deaccelarate the engine stalled. Mechanic attempted repairing the valve but it wouldn't have anything to do with it so replaced it. Tested it last night and seems to be running fine.

Tiny
Rob906
Feb 1, 2012.

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