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It sounds like either the ignition module or the EZK module are bad. It's also very possible that the hall effect pickup is bad.
The ignition module is a likely suspect - the failure mode you describe sounds like it might be the thing. Ignition modules often fail as they heat up, so this might be it. The ECU will essentially shut off if it doesn't receive the ignition pulse signal from the ignition module.
You should be able to get an ignition module pretty cheaply from the pick n pull (I do hate to send you out again for a diagnostic part in this weather). The ignition module is a small, grey unit on a fairly heavy heat sink on the outside of the inner fender, almost across from the EZK box.
posted by 66.21.16...
Posts in this Thread:
- 89 Saab 900, Carol in TX, Sun, 5 Jan 2003 23:56:34
- Re: 89 Saab 900, EdWes, Tue, 7 Jan 2003 08:17:17
- Bad ECU, RS
, Mon, 6 Jan 2003 08:28:12- Re: Bad ECU, Carol in TX, Mon, 6 Jan 2003 09:56:26
- '89 was a bad year for C900 ECUs, RS
, Mon, 6 Jan 2003 12:49:43 - Re: Bad ECU, JimBlake
, Mon, 6 Jan 2003 12:05:39- Thanks for all the good info but..., Carol in Texas, Mon, 6 Jan 2003 12:54:43
- Re: Thanks for all the good info but..., JimBlake
, Mon, 6 Jan 2003 13:59:49 - Let's go back to the beginning ..., RS
, Mon, 6 Jan 2003 13:06:15- Re: Let's go back to the beginning ..., Carol in TX, Mon, 6 Jan 2003 14:14:46
- OK. Maybe ignition module, RS
, Mon, 6 Jan 2003 15:26:56 <-- Viewing This Message- non-turbo??, JimBlake
, Mon, 6 Jan 2003 15:44:25 - PS, RS
, Mon, 6 Jan 2003 15:29:53- Re: PS, Carol in TX, Tue, 7 Jan 2003 00:35:02
- Re: PS, Carol in TX, Mon, 6 Jan 2003 20:52:56
- Re: PS, Carol in TX, Mon, 6 Jan 2003 16:20:03
- Where in TX? n/m, Dave D, Mon, 6 Jan 2003 01:05:46
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