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Erratic revving

A

Amolak

New member
Joined
4 Jul 2004
Messages
16
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
 
what model?

Migration info. Legacy thread was 19109
 
opps!

1986 Carrera 3.2 manual UK model.

cheers

Amolak


Migration info. Legacy thread was 19110
 
could be a vacuum pipe loose or missing?

Migration info. Legacy thread was 19111
 
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.


Migration info. Legacy thread was 19128
 
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


Migration info. Legacy thread was 19707
 
Previous poster said:
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
Click to expand...
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


Migration info. Legacy thread was 20326
 
Correct - idle stabiliser - remove - clean carefully the internals and replace - done!

Migration info. Legacy thread was 20341
 
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