The V8 Owners Forum -

A friend has just got a 3.5 RR, I think its about an H plate so not sure if flapper or hotwire? Anyway he says its running lumpy, revs up and down when it's hot and cold, and sometimes stalls when put into drive.

Any ideas?

topcatproduction wrote:A friend has just got a 3.5 RR, I think its about an H plate so not sure if flapper or hotwire? Anyway he says its running lumpy, revs up and down when it's hot and cold, and sometimes stalls when put into drive.

Any ideas?

fit carbs!

is it runnig really rich?

If so probably in limp home mode

Disconnect battery for 30 secs

Reconnect

This resets the ECU and clears the fault code

If it persists then it's time to get a fault code reaer and find what's going iffy

I agree
Carbs are easier

Ian

I think apart from lumpy idling* (sorry key word was missing before) it runs and drives ok...

Normally all RR efi 3.5 are flapper, there is only the discovery who had 3.5 efi Hotwire.

Hummm lumpy idling.... may be overrun valve ?

There is an idle mixture screw on the air-flow meter. Does adjusting that make any difference?

You really need the Land Rover diagnostics manual, which you can get from here:

Small one to start with:
http://www.cowdery.org.uk/downloads/V8EFiSystem.pdf

And then scanned version of manual (132Mbyte!)
http://www.cowdery.org.uk/downloads/Fla ... ual.tar.gz

In my humble opinion, taking the time to download and then go through the latter download _will_ fix the problem far more reliably than making random guesses......

Chris.

Will try the screw on the AFM, it only runs poor on idle, not driven it myself yet but he says it goes like S_I_ off a SH_V_L when driving it from 800/1000 upwards