Re: 528e idle problems

[Todd Kenyon <esbarr@xxxxxxx>]

Check the following:

coolant temp sensor, check the resistance across contacts (see Bentley manual). These often
go bad (don't give enough resistance when coolant is cold, tricking the computer into
thinking the engine is already warm), which could easily cause the bogging down you mention.

Check ALL rubber parts on your air intake (bellows, etc.) squeeze them to look for cracks
and check clamps to make sure seal is good - will cause floating idle if air is getting in
after the flow meter.

These are a couple of the easier things to check and some of the more likely culprits, but
certainly not the only possible causes.

Todd Kenyon
88 M5
84 633 (ex)


> Date: Sun, 24 Sep 2000 11:25:08 -0700
> From: "John F. Korzeniowski" <angus2@domain.elided>
> Subject: 1985 528E
>
> Hello List:
>
> My 528E has the following idle problems.
>
>     When cold car hesitates (boogs down) - does not do it when warm.
>     Erratic idle 800 rpm to 1,100 rpm.  When car warms up it sometimes
> has a perfect idle.  Other times
>     is  jumps between 800 rpm to 1,100 rpm.
>
> I just had a major tune-up including new wires, plugs, distributor cap,
> rotor, etc.
>
> Any ideas where I should look next to resolve these problems.
>
> Thanks to everyone:
> John
>
> [

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