703i E32 1988 tickover problems

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   Hi,
I've recently been given a 1988 E32 730i auto, with 155,000 miles on the clock. The problem is the engine surges between 1100 & 1400rpms when its ticking over.
If I remove the electric plug from the ICV and tap the housing then the engine rpms drops to around 650 and is steady, the minute I push the plug back on then it starts surging again.
Does anyone know where the ICM is situated on the car?

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tubby735 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18-May-2005 Location: Crewkerne, Somerset, England Status: Offline Points: 1	Topic: 703i E32 1988 tickover problems Posted: 18-May-2005 at 07:58
	Hi, I've recently been given a 1988 E32 730i auto, with 155,000 miles on the clock. The problem is the engine surges between 1100 & 1400rpms when its ticking over. If I remove the electric plug from the ICV and tap the housing then the engine rpms drops to around 650 and is steady, the minute I push the plug back on then it starts surging again. Does anyone know where the ICM is situated on the car?

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M3AG Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II 7 series & e36 m3 registrar! (Madness) Joined: 17-October-2002 Location: Good Old Hertfordshire Status: Offline Points: 1644	Posted: 18-May-2005 at 09:00
	try cleaning the ICV using carb cleaner, and ensure the connections are clean.
	we're the Sweeney son, and we ain't had our dinner.....

Andyboy Members Profile Send Private Message Find Members Posts Add to Buddy List Banned User Joined: 04-June-2003 Status: Offline Points: 707	Posted: 20-May-2005 at 15:21
	There is no idle control module, the ICV is controlled by the ECU. Basically the ICV is knackered although you could try cleaning it with carb or brake cleaner (same stuff). A secondhand one shouldn't be more than �5-10 from a scrapyard and one from a 525i or an E30 should do the trick. It could even be the air flow meter, but try the ICV first.