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Re: My 1990 900 turbo needs a new computer Posted by Roger D [Email] (#1121) [Profile/Gallery] (more from Roger D) on Tue, 27 Apr 2021 09:27:33 In Reply to: My 1990 900 turbo needs a new computer, AzSaabguy [Profile/Gallery] , Tue, 27 Apr 2021 07:44:56 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Do you have a -948 box now? That's the good one for 89-94 turbos. And pretty reliable. I have a little experience with bad boxes. In my experience they were good until they were bad. Then they were real bad. Like barely running, dumping fuel or just not starting. What is causing it to fail smog? Has he verified the temperature drop across the cat shows it's working? They are sensitive to accurate ignition timing. I seemed to get a little better tailpipe readings with the basic timing a degree or 2 less.
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