Question about 1997 BMW 318

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N reg 218i auto starting problems

Wen i try to start it i get a hum noice from what looks like a sensors on the throttle body there are two sensors its the 2nd one what is this part called its got two allon key screws i took it off spayed with wd40 put back on then it started idled ok for 30 seconds then died again help !!!

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It is your idle control valve , when you start your car the humm should go away , if the car dies on staring and the humming stays there all the time it is faulty

Posted on Jul 18, 2008

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Volvo c70 2001. blown engine. Have now replaced engine/used old throttle body but car difficult to run and hard to start. surging badly will not idle/stalls


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I'd bring it back to the shop that put in the throttle body and have them check to see if the replacement was defective or failed. If not, you may have a bad throttle position sensor [part of the gas pedal] I'm assuming it worked fine for a while after the repairs with no problems then suddenly started acting up again. I've replaced a bunch of throttle bodies but only one position sensor so far. There's always the chance that there's a bad wire somplace or some other more exotic problem but I'll bet you'll find it at either the sensor or throttle body. Good luck, hope this helps!

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