Success! ...then not. 1982 non-turbo resurection not starting - Saab 900 Bulletin Board - Saabnet.com
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Success! ...then not. 1982 non-turbo resurection not starting
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Posted by 2nd Owner [Email] (#70) [Profile/Gallery] (more from 2nd Owner) on Mon, 9 Nov 2020 17:23:24 Share Post by Email
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I've been working on a 1982 900s that has not run for many years. Maybe 5, maybe 11, maybe more... no one really knows. I have replaced or rebuild or cleaned everything from the tank to injector tips and today the kids and I went out to fire it up.

It started on about the third pull. Ran really rough but in about 3 minutes started to find its idle. During this time I didn't rev it high // I helped it a few times when it was idling really low, but that was it. It smoked a lot. I had put a little oil in the cylinders a couple weeks ago so I assumed it was from that. It was pretty white and never went away. Looked like a blown turbo or blown head gasket level of smoke... after about ten or fifteen minutes I started thinking that it was running super rich. It could be/ I have a mixture control unit from one car and a fuel distributor from another... & nothing has been dialed in yet.

So I shut it down. Restarted it a couple times which it did. Then I let it sit about 15 minutes and it has never started again. It gets an initial rev probably from the cold start injector but then just dies. It doesn't even come close to grabbing an idle.

I played a little bit with tiny turns to the mix screw but no change either direction I turned.

questions:
can running rich make that much smoke?
any tips on leaning it out or advice on that mix screw?

Tomorrow I plan on pulling the injectors and running the pump and see if they all are putting out similar amount over time. The spark plugs were brand new so I will also look at them to be sure all four look similar and normal.

The upside, after 5 or 11 or 18 years it actually coughed back to life which was promising.


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