Hi, All:
I've been fighting a really poor cold idle on my '91 IX for a couple of years. Once the engine is warm, it idles like a Lexus, but when it's cold, it bucks, runs rich, hesitiates, wants to stall, idles low (500-600), and is just unbearable...
Background: I've replaced the O2 sensor, AFM, temp sensors with brand new parts, and swapped ECU's with a friend. There are no intake leaks, The PO replaced the ICV with a new one. Sidenote, I just rebuilt the engine (with new block / pistons from BMW), and rebuilt the head, so I know compression is good!
Tonight, I went out to swap the ICV just to leave no stone unturned. I put my friends on, and of course, the car started and ran like crap. I thought to myself, who's to say that the ICV is installed correctly?? The PO replaced it, but maybe he put in it backwards!!! I swapped it around, started the car, and VIOLA!!! It ran totally awesome!!! Idled great, exhaust smelled 'normal'... no more bucking/hesitation/stalling!
Sooo, my question is, who can tell me which direction/orientation the ICV should have on the engine??? There's an arrow cast into the metal
body. Can someone tell me which way that arrow should point??? Mine pointed TOWARDS the engine (you could see it on the top of the ICV). When I reversed it, it now points towards the AFM (but you can't see it because it's now on the bottom side of the ICV). Can someone post a closeup pic of their ICV installed on their 325i?? I'd be able to tell from the pic which way it's installed.
Thanks !!
Ron ///Man
I've been fighting a really poor cold idle on my '91 IX for a couple of years. Once the engine is warm, it idles like a Lexus, but when it's cold, it bucks, runs rich, hesitiates, wants to stall, idles low (500-600), and is just unbearable...
Background: I've replaced the O2 sensor, AFM, temp sensors with brand new parts, and swapped ECU's with a friend. There are no intake leaks, The PO replaced the ICV with a new one. Sidenote, I just rebuilt the engine (with new block / pistons from BMW), and rebuilt the head, so I know compression is good!
Tonight, I went out to swap the ICV just to leave no stone unturned. I put my friends on, and of course, the car started and ran like crap. I thought to myself, who's to say that the ICV is installed correctly?? The PO replaced it, but maybe he put in it backwards!!! I swapped it around, started the car, and VIOLA!!! It ran totally awesome!!! Idled great, exhaust smelled 'normal'... no more bucking/hesitation/stalling!
Sooo, my question is, who can tell me which direction/orientation the ICV should have on the engine??? There's an arrow cast into the metal
body. Can someone tell me which way that arrow should point??? Mine pointed TOWARDS the engine (you could see it on the top of the ICV). When I reversed it, it now points towards the AFM (but you can't see it because it's now on the bottom side of the ICV). Can someone post a closeup pic of their ICV installed on their 325i?? I'd be able to tell from the pic which way it's installed.
Thanks !!
Ron ///Man
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