Erratic revving

[Amolak]

Hi, Sometimes when I drive my car it starts to rev up and down itself between 500-2000rpm. If I apply the throttle it sometimes cuts out. What could cause this?, it is intermittent. thanks Amolak


Migration info. Legacy thread was 19103

 

[poon]

what model?

Migration info. Legacy thread was 19109

 

[Amolak]

opps!

1986 Carrera 3.2 manual UK model.

cheers

Amolak


Migration info. Legacy thread was 19110

 

[poon]

could be a vacuum pipe loose or missing?

Migration info. Legacy thread was 19111

 

[Matt]

Sounds like a fuel mixture problem, probably running too rich if hunts at tickover and sometimes dies.

Could be caused by a loose vacuum pipe as Poon says, check all the tubes and connections round the back of the engine (not the easiest of jobs).

To get the mixture set properly you need to take it to a garage with a CO meter. Just make sure all the pipes are fine before you get the engine tuned.

Matt.


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[Mark deans]

Hi

friend of mine had same sort of problem on his 993 came down to the airmast sensor thought his car was at several thousand feet on and of therefore ajusts the air intake accordingly



hope this helps


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[porkapig]

Quote: Originally posted by Amolak on 09 October 2004

Hi, Sometimes when I drive my car it starts to rev up and down itself between 500-2000rpm. If I apply the throttle it sometimes cuts out. What could cause this?, it is intermittent. thanks Amolak

Idle stabiliser valve? been playing with mine (993) to get it to run right with a LWFW - produces the same problem if adjusted too far

marc


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[Used Porsche]

Correct - idle stabiliser - remove - clean carefully the internals and replace - done!

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