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Re: 88 900s Won't start, suspect computer? Posted by RS [Email] ![]() ![]() ![]() In Reply to: 88 900s Won't start, suspect computer?, Ben Millard, Sun, 24 Nov 2002 16:00:17 Members do not see ads below this line. - Help Keep This Site Online - Signup |
'88 900S ECUs tend to be more reliable than '89s.
When they changed out the ECU, did they change the system relay and fuel pump relay. These are located above the ECU, on the right side.
Townsend imports mentions that, when you change a failed ECU, you really should change those relays. As the relays get old, the "snubbers" on them tend to die and, when the ECU de-energizes the relays, they backfeed current to the solid-state relays in the ECU as the magnetic field in the relay coils collapse. This tends to damage the solid-state ECU relays.
What are the SAAB and Bosch part numbers on the ECU that they transplanted into your car?
You may also want to clean and retighten the ground point on the engine lifting eye behind the AIC valve - that's where all of the ECU grounds congregate.
Any spark?
posted by 66.21.16...
http://216.78.172.244/engine_folder/nostart24.htm
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