Vehicle & Technical > Range Rover

Revving on start up

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Garth:
Can anyone shed any light as to why my RRC revs to about 2500 RPM for a couple of seconds when I start it.  Its only done this since I replaced the advance\retard diaphragm so it would lead to that.  Are there different types and how do you tell difference

Range Rover Blues:
I'm assuming it's a 3.9 hotwire then if it's a '91.

There are one or two things it could be

Idle stepper sticky or faulty
base idle set wrong
timing well out or sticky
leaky injector/overfueling

does it need a lot of cranking?

Garth:
Hi

Cheers

Yes its a hotwire

Timing is set to as far advanced as possible on petrol without pinking
Advance retard works ok altho tube is a bit ropey
Starts on first couple of turns and ticks over at 700 ish when calmed down

I will look in manual and check stepper thingy

jpc:
mine does the same i presumed that it was the automatic choke? :oops:

Garth:
Took Air bypass valve (stepper thingy) out tonight cleaned up and checked it was working and it is.  So its not that. :(

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