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SandMan

E30 - 320i - Idle issues

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OK, here's the problem, the car starts and run well, it doesn't have much power, but that's a 320i for you.

when it idles it seams to keep hunting, like I ,mean it changes from 500-rpm and goes up to 1000-rpm and back again every few seconds.. almost like it has a manifold leak?

Any ideas? :wacko:

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If its motronic....try another idle valve or clean out your old one with carb cleaner

If its MEII.....check the cold start air slide under the manifold

You would also need to check the TPI switch

Thats all after you have checked for air leaks

Idle fuel mixture might be too rich as well

Should be 2% Co at idle + or - .5% with about 150-200 Hc ( with our super fuel)

The book says 1% = or - .5%....thats a little too lean tho

You need to set at the lowest Hc where it idles the smoothest

You might need an auto tech to do this tho

Air flow meter could also be sticking on the sliding vane

or spring tension may need to be altered.... these are getting old now

Cheers

Glenn

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glenn, do you ever sleep? seriously!

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glenn, do you ever sleep? seriously!

lol

I'm always at work about 5.00 in the mornings

Shhhhhh about that tho

Dont want customers here at this hour

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Ooops.. I forgot about this too ( its been a while )

If its running a Kat ( fit a dog )

Then disconnect sensor and either recode DME to NZ spec non Kat

or get another DME ( which ever is the cheapest ) has to be non Kat tho

Idle surging was a problem with these...especially 325's

Cheers

Glenn

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