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Re: Followup Engine Starts then Stops Posted by RS [Email]  (#15)  [Profile/Gallery]
(more from RS) on Sun, 17 Nov 2013 10:01:41
In Reply to: Followup Engine Starts then Stops, bikerdad  [Profile/Gallery]
, Sat, 16 Nov 2013 17:31:31
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If you hadn't said that you changed out the ECU, I'd have bet that, based on what you say the noid light does, that the transistor in the ECU that switches to complete the circuit to trigger the injectors is getting weak. All 4 injectors fire together and are triggered by a single transistor.
There's a slight possibility that you have 2 bad ECUs, but you may well have a grounding or battery cable issue.
How is the ground at the radiator crossmember and how are the grounds at by the AIC valve? Are they clean and on their proper screws?
What voltage do you measure between the negative battery terminal and the positive connector up on the passenger side inner fender?
FWIW, if the transistor in the ECU is indeed bad, it it can be replaced: BDX53C - Mouser has 'em
If you do a google search for "BDX53C saab ECU replacement" (w/o the quotes), there's a page on another SAAB site that shows how to do it.
->Posting last edited on Sun, 17 Nov 2013 10:21:54.
, Sun, 10 Nov 2013 11:33:53, Sun, 10 Nov 2013 18:29:34, Sat, 16 Nov 2013 17:31:31, Sun, 17 Nov 2013 10:01:41 <-- Viewing This Message, Mon, 11 Nov 2013 06:52:49
, Sun, 10 Nov 2013 20:59:58
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