12 replies to this topic

[cooperkelly]

Hi,

Final one for now!

'99 Cooper Standard MPI

Idles at 1500 RPM... That's the first thing- how do I wind this back down to where it needs to be... (900??)

Secondly, My throttle seems to stick around 2000 for a few seconds at a time when I rev, and when in forward motion.
If I leave it, it then returns to around 1500 as per above.

Fault diagnosis / checklist on where to start with these would be really helpful!

Thank you!!

Kelly
x

[shorty]

getting the timing sorted could possibly lower your idle revs

[Pauly]

Could be your throttle position sensor or even your idle air control valve, MPI's run a coil pack system dude, so timing is done by MAP. Generaly with injections if a problem occurs I get it on a diagnostic, because sensors arn't cheap and your fishing in the dark when problems occur.

Edited by Pauly, 24 March 2010 - 08:26 PM.

[cooperkelly]

Could be your throttle position sensor or even your idle air control valve

Thanks Pauly- I'll try both of those and report back with results... failing that, diagnostics will be the way forward I think...

Ta,
Kelly

[cooperkelly]

Just a quick update, if anyone recognizes this as a familiar issue:

The sticking seems only to occur when the engine's warm- up to around midway on the gauge.

When cold, revs are around 1200 RPM (not the "standard" 1500 when warm!)

Due to the bad weather I've postponed any further inspection til it's better out there, but thought I'd just update the above in case it rings a bell with anyone.

Thanks!
Kelly

[bubblebuster]

the mpi minis sufferd from the throttle body warping, i believe minispares do an up-grade/modification.
maybe this is the problem.

[Punts]

Thought I had a sticking throttle (MPI Cooper, not returning fully to idle). Started to fit a new throttle cable and found the return spring on the accelerator pedal had slipped. Slid it down a bit to give the spring a bit more tension-- Sorted.

[Carlzilla]

i thought the 'standard' idle was around 950rpm? i know mine idles at 1000rpm because i dont trust it to go any lower incase it conks out as the timing/fuelling is all over the place, although i tend to keep it at 1500 as a safeguard when on short trips

[cooperkelly]

i thought the 'standard' idle was around 950rpm?

Sorry Carl- my bad explanation... I meant that because it's idling at 1500rpm "as standard" at the moment due to this issue, that's what it keeps going back to! I'd love it to be purring around the 950/1000rpm mark!!

I've got a great list of things to try now thanks to everyone here, so I'll tinker and tamper and update with results!!

Thanks,
Kelly

[voinea]

cooperkelly> please let me know what was wrong with your car. I have same issue with a 99 mini 1.3 mpi (i bought it 3 days ago and it was exactly like yours)

[cooperkelly]

Hi everyone- just a quick update...
I had the mini plugged into a diagnostic code reader today, at Track, Road and Race in Northampton.

It threw up 2 main issues- lambda and air temp sensors. I believe once one goes, the other's likely to follow as they try to compensate.
So I'm going to attempt to replace these, and I'll let you know if this sorts things out!!!

[Pauly]

Sounds promising, thats iklemini isn't it?, ive always heard good things about dave .

I know its extra cash to have a test done but its better in the long run because you know exactly what to do now.

Edited by Pauly, 30 March 2010 - 06:32 PM.

[voinea]

Have you solve the issue bellow ? How ?? My mini still does that thing staying at 1500rpm and sometime stuck at 2000rpm and after few seconds coming to 1500