Right redone the test after resetting the ECU, and this time with the engine running, got codes 57 and 65 again

im gonna change the ICV but how do i sort the Carbon Monoxide Potentioner?

i would try testing your idle valve first M15T and if when u pass twelve volts through it it worsk then its not your idle valve.

i have had an idle problem/misfire problem which was solved with a working air flow meter !!

LMF sell them (leicester motor factors) they do Genuin vauxhall stuff cheaper, expect to pay £70ish english pounds

aaah shweet. so hopefully its just the ICV thats the problem, there was a site that sold these, was posted a while back.

crank shaft sensor no signal is to be ignored because the engine is not running

yes i reckon thats a plan :thumbs:

well its running ok, just a bit tappy up top, and the revs keep dropping and raising from ther dodgy ICV, wanna reset it and start it again to get new codes if any.

cheers for your help people :D

quote:

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Originally posted by M15T XE
if the Crank shaft sensor wasnt working what would it cause the engine to do?

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okey doke, ill go take out the ecu so my alarm is still working

dont u just leave the connecters off the battery for a few hours this shud clear it? i think dnt take my words on that but its what ive been told b4 :)

if the Crank shaft sensor wasnt working what would it cause the engine to do?

to reset ecu you need to disconnect battery for atleast 20 mins

aaah kool

how do you reset the ECU to delete the codes, i tried turning the key 30 times but was still showing the codes.

by the way carbon monoxide pentiometre is the screw on the side of the air flow metre

thats what i thought aint too sure what it is though.

65 and 66 are a bit conflicting arnt they

Just done a check on the car to see why the Engine management light is on,

heres the codes

31 Engine RPM signal (crankshaft sensor) No signal
57 Idle Speed Control Valve (ISCV) Interruption
65 Carbon Monoxide (CO) potentiometer Low voltage
66 Carbon Monoxide (CO) potentiometer High voltage
73 Air Flow Sensor (AFS) Low voltage

ignore the AFM as i ran the engine with it off for a while to see if it was contributing to the rough idling problem i have been having

i have a changed the ISCV today to my dads one and the revs dropped but still it idled up and down.

im gonna try changing the crank shaft sensor as it is a bit chewed up at one end.

what are the others

Apreciate any help
cheers
Mist