Mud-club

Vehicle & Technical => Range Rover => Topic started by: Garth on September 20, 2006, 23:08:34

Title: Revving on start up
Post by: Garth on September 20, 2006, 23:08:34

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

Title: Revving on start up
Post by: Range Rover Blues on October 03, 2006, 02:31:19

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?

Title: Revving on start up
Post by: Garth on October 03, 2006, 18:27:44

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

Title: Revving on start up
Post by: jpc on October 04, 2006, 19:44:04

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

Title: Revving on start up
Post by: Garth on October 04, 2006, 22:59:47

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

Title: Revving on start up
Post by: Garth on October 06, 2006, 22:33:34

May have spoke too soon

Last two mornings and nights seems to be a bit better so I will take out again and give a good soak of WD40.
May be working but be a bit sticky!!