High Idle / Ticking? - BMW Forum - BimmerWerkz.com

3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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post #1 of 2 (permalink) Old 08-06-2011, 07:16 PM Thread Starter
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High Idle / Ticking?


I've noticed 2 strange problems with my 1998 318is (4 dr), which might be linked - was hoping someone could help!

The engine idles at around 1700 rpm whether hot or cold, which is way too high.

Also, when accelerating there is a fairly quiet ticking noise which seems to come from 'inside' the dash. No noise when idle, but becomes audible and gets faster as I accelerate. Then foot off the gas at speed and the noise disappears again.

Someone told me the high idle could be to do with a vacuum leak, so I think I'll need to check the gasket on the input manifold. Could this also be the cause of the ticking?

Any suggestions would really be appreciated!

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post #2 of 2 (permalink) Old 08-07-2011, 08:46 AM
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Not sure that the "Ticking" is related, but, your high revs could well be a cracked or unseated hose... Even could be a dirty Throttle-Body or failing MAF !!
I would not suspect the ICV because if this was failing then your motor would try to stall !!

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