Re: Dying idle possibilities - Saab 900 Bulletin Board - Saabnet.com
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Re: Dying idle possibilities
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Posted by vvack0matic [Email] (#1443) [Profile/Gallery] (more from vvack0matic) on Mon, 17 Feb 2014 10:39:18 Share Post by Email
In Reply to: Re: Dying idle possibilities, Frankenstein900, Sun, 16 Feb 2014 19:17:29
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I'm confused, (whats new right). We bounced around so much smoke

This is what I got from reading, something happened which made the motor drop to 200rmps and started smoking. Question( was the smoke at 200rpm brown or white? I don't know what dirty smoke is if I had to guess it say it was brown.

To answer this problem' your motor started to misfire' when the motor drops to 200 rpms its a common rpm for the motor running on 3 cylinders. Depending on how tuned the motor will reflect how long it is able to run on 3 cylinders. The brown (dirty smoke) is pure un burnt fuel from the dead cylinder.

The amm can be the cause, I've had it happen to mine. If the amm is 100% good its the amm motor harness plug that plugs into the amm. Pull the plug look inside and take a pick and press them prongs closer together. Then spray electric cleaner in the plug and where it hooks to the amm.

Now seeing you cleaned the amm the car now idles, but is burning smoke. (white) personaly, I haven't used any additives in any of my vehicles because there's no point. The way I see it is if someone puts an additive in their motor,transmission, where ever is because their trying to put a bandage over some other problem that will cost tons to fix.
I haven't a clue what sea foam is, but going off of what you found about it might become thicker there is one item that will be affected and can cause your smoke, and that's the turbo seals, if the foam has collected in the oil tubes and caused blockage it would restrict the oil to the turbo burning up the turbo seals(are you sure its white and not light blue smoke). The turbo unit is working at 1100 degrees or more all the time. Question is' what's the burn point of your sea foam perhaps it was sent to the turbo and burned off creating a crispy brown blockage.

If your motor is still dropping to 200rpms after 2 min. That is the time the oxygen sensor stop taking control of the idle and the amm takes over. If cleaning the motor harness dosent fix it try a good new/used amm


->Posting last edited on Mon, 17 Feb 2014 10:48:12.


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