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DISCUSSION => Engine + Driveline => Topic started by: ///m42 sport on September 19, 2009, 05:59:42 PM

Title: irratic idle, cuts off
Post by: ///m42 sport on September 19, 2009, 05:59:42 PM

This happened suddenly the other day.  The engine suddenly has irratic idle and cuts off unless I keep the revs up.

I checked hoses (replaced last summer)

video
http://www.youtube.com/watch?v=NP8ICRDqEXY
http://www.youtube.com/watch?v=zXSTeOm2uZE

Title: irratic idle, cuts off
Post by: nicknikolovski on September 19, 2009, 07:18:29 PM

Idle Control Valve - happened to me as well, crappy idle with rpm gauge fluctuating and then engine justs stall.

Title: irratic idle, cuts off
Post by: ///m42 sport on September 19, 2009, 07:35:14 PM

No, I replaced it with a brand new unit yesterday.  No change in symptoms.

Title: irratic idle, cuts off
Post by: CL4RKY_318IS on October 01, 2009, 11:27:57 PM

throttle position sensor. get it plugged in and see what errors the ecu chucks up. mines doing this im sorting it today the tps is telling the ecu the engine isnt running at idle speeds because its failing. this causes the ecu to stop the fueling which makes it cut out

Title: irratic idle, cuts off
Post by: roundel318 on October 03, 2009, 12:26:40 AM

I was able to replicate this the other day for someone on another issue with the TPS. Unplugging it resulted in this behaviour.

Title: irratic idle, cuts off
Post by: ///m42 sport on October 04, 2009, 02:40:22 PM

where is it located?

btw the car runs now but gets terrible mileage and poor responsive on the throttle.  Idle is steady.

Title: irratic idle, cuts off
Post by: 1991318is on October 04, 2009, 05:46:20 PM

Quote from: ///m42 sport;79400

where is it located?

btw the car runs now but gets terrible mileage and poor responsive on the throttle.  Idle is steady.

Its the black plug on the side of the throttle body. Hope that gets it all fixed. My guess would be hoses, but since you checked those I got no idea.

Title: irratic idle, cuts off
Post by: cravo on October 04, 2009, 06:39:24 PM

Same thing is happening with my 89iS...
Replaced hoses, TPS and Idle valve and still the same... i think it´s possessed by some demon... :D

Title: irratic idle, cuts off
Post by: ///m42 sport on October 05, 2009, 08:05:24 PM

hmm, well I just ordered a new intake boot and throttle position sensor.  Will update once installed.

Title: irratic idle, cuts off
Post by: ///m42 sport on October 10, 2009, 04:14:58 PM

ok I replaced my tps and intake boot.  No change.

Title: irratic idle, cuts off
Post by: dinu.negrean on January 31, 2010, 10:43:57 AM

Any updates on the matter?

Title: irratic idle, cuts off
Post by: vibefm on May 08, 2010, 01:11:56 PM

Hi,

I have a 1993 318is 1.8 and have the same issues but i also get my throttle sticking at 1600rpm when the engine is hot?? anyone else had this and has anyone taken the BMW to a main dealer to be checked over on the diag computers