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Fast Idle?

 
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gilmore



Joined: 01 Feb 2012
Posts: 79

PostPosted: Sat Oct 22, 2016 12:03 pm    Post subject: Fast Idle? Reply with quote

I've had a problem with my 50th for a couple of months that has been slowly getting worse. The new exhaust doesn't affect it. It's the same as before.

When the engine is cold, the idle is around 800-900 RPM, but when it gets warm the idle (in neutral) is up over 1000 and even as high as 1500 rpm.

Does anyone know what commonly causes this problem? I did a quick search and people have mentioned a stepper motor or stepper valve problem. I'm not sure what a stepper is, let alone how it could affect idling.

Can anyone shed some light on this fast idle problem? Thanks in advance.

cheers
rob
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DaveT



Joined: 04 Feb 2005
Posts: 137
Location: Lingfield

PostPosted: Sat Oct 22, 2016 12:40 pm    Post subject: Reply with quote

I had a similar problem a while back and swapped stepper motor which didn't cure it, in the end the garage solved it, apparently there was a couple of air leaks in the inlet system after the MAF. Probably why every join and seal is covered in blue sealant now.
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Adam



Joined: 12 May 2013
Posts: 45
Location: Newark. Nottinghamshire

PostPosted: Sat Oct 22, 2016 12:46 pm    Post subject: Reply with quote

Mine did that in the past. It went after I changed maf sensor.
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gilmore



Joined: 01 Feb 2012
Posts: 79

PostPosted: Wed Oct 26, 2016 10:25 pm    Post subject: Reply with quote

Thanks folks.
It only happens when she's warmed up. I'll get my mechanic to investigate...
cheers
rob
_________________
Defender 50th Anniversary Edition GB236
Mercedes ML350CDI Sport
BMW 330d M Sport Convertible
Honda CRF250X
Mercedes Sprinter 315CDI LWB
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