Car revs itself a bit at idle... Sometimes

Delmonte

Delmonte

Member
Messages
878
Anyone know what this is? At moment it's only occasionally but it revs itself a bit when it's meant to idle. Only a bit mind, maybe 1000 rpm up and down at the most, from normal
idle speed. And annoyingly,not all the time...
 
Spartacus

Spartacus

Member
Messages
3,186
It's hunting. Probably an air leak somewhere or the MAF. Get the codes read and it will point you in the right direction.
 
spkennyuk

spkennyuk

Member
Messages
5,960
As Sparts has said probably an air leak there is a metal tube across the front of the engine bay that corrodes and get small holes in it. Worth checking that first to see if their are any rusted areas on the underside and check the hoses round the MAF.
 
Last edited:
MeltonBrand

MeltonBrand

Junior Member
Messages
26
Delmonte said:
Anyone know what this is? At moment it's only occasionally but it revs itself a bit when it's meant to idle. Only a bit mind, maybe 1000 rpm up and down at the most, from normal
idle speed. And annoyingly,not all the time...
Click to expand...

Is this a 3200 or a 4200? I've just solved the intermittent but sometimes extreme over idling on my 3200 with a contactless throttle pot.
 
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