Vauxhall Vectra B 1997 X18XE - Revs slow to fall

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Tue 10 Aug 2010 10:33
Vauxhall Vectra B 1997 X18XE - Revs slow to fall - Archie

Unless the accelerator is released well before the clutch is dipped there is a rise in engine speed when changing gear. This leads to jerky gear changes. I have cleaned the throttle body and the idle control valve. Do the Backroomers have any ideas why this is happening. I can live with it but would prefer to fix it.

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Tue 10 Aug 2010 16:23
Vauxhall Vectra B 1997 X18XE - Revs slow to fall - dieselicious

could be a mass airflow sensor.....i had similar symptoms on a Golf and it turned out to be that - a new MAF sensor fitted and no trouble since.

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Tue 10 Aug 2010 16:33
Vauxhall Vectra B 1997 X18XE - Revs slow to fall - SteveLee
Could also be caused by an air leak on the inlet system somewhere assuming the 1997 era FI system isn't new enough to shut the fuel off on a closed throttle. Spray around the inlet manifold and various inlet hoses with WD40 with the engine warmed up and ticking over a stuttering or faltering tickover as the WD40 is ingested indicates a leak somewhere.
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