Idle and CO problems

[honestfreddie]

I have just fitted a new fuel relay but now I seem to have another problem.

The car will not run at a steady idle. After starting it will idle at around 800rpm for the first couple of minutes, then it goes up and down from 200 to 1500 and if left will eventually stall. The CO level is running at around 8.6!! I have been told this should read between 0.30 to 0.50 for a 4.0 HC.

Any advise???

[Big Al.]

Just a thought, have you cleaned the stepper motor?

[HarryW]

Tick over CO is also one of the functions of the Air flow meter, but you've only changed a relay . Unless its something obvious that you've changed or accidentally touched and the stepper is clean, I'd be inclined to wait for an expert to reply. Sorry couldn't be of any greater help.

Harry

[jigs]

Did you reset your ECU after you replaced the relay? Easy to do and should be done after any fault has been rectified.

[GreenV8S]

Sounds like there's something wrong, and no doubt a professional would soon work out what. For example, you may have the wrong fuel pressure, one or more blocked/dirty injectors, air leak, AFM wrongly calibrated, duff throttle pot, exhaust manifold leak, duff lambda sensor, duff fuel temp sensor - lots of things to check. Mark at Tower View seems to have a sixth sense at this sort of thing, but I would have thought most experts would be able to track it down.

[honestfreddie]

Thank you all for the advise. I have done all I can so it's off to the Garage on Tuesday

>> Edited by honestfreddie on Sunday 4th May 11:28

[max500]

Interested what HarryW said about air flow meter. I have same symptoms but also occasionally cuts out altogether. Could this all be due to air flow? Had a recon one but maybe it's a duffer too!

[david beer]

My Griff has had poor idle, at lights i always had to cover the throttle, ready for it to die. Poor connection on the air flow meter, give a wiggle to try.