Erratic idle sometimes - V8 Disco1

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N

nauj

Guest
Hi Guys, please advise..
My 3.9V8 Disco-1 idles erratic sometimes (cold & operating temp). Most of
the time she's fine. The temporary high idle after startup is fine, and when
the air-con is switched on (operating temp) there's no decrease in idle
speed, which means the stepper is working. When blanking off the air-bypass
hoses to adjust idle speed with the allen screw on the throttle-body, she
won't idle at all, doesn't matter where I set the little screw.

Greetings,
Pieter
 

joey

Custom Rover Accessories
Staff member
Joined
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Sounds like a vacuum leak or fuel filter... but could be other things.

Please provide maintenance history for better diognostics.
 

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