On the '89 LH 2.4 ECUs, the output transistors - Saab 900 Bulletin Board - Saabnet.com
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(solid state relays) for the fuel pump relay and system relay have a tendency to deteriorate when they're hammered by backfeed from the relay coils when the relays are de-energized.
Ubipa had posted a part number for the output transistor over on the Performance board.
One of these days, I'll get a couple of the transistors and see if replacing them will bring my '89 SPG ECU back to life.
posted by 63.148.1...
Posts in this Thread:
- LH 2.2 ECU not grounding fuel pump relay..., Gregg C, Wed, 29 Oct 2003 22:11:05
- Known weakness, Stephen Goldberger, Thu, 30 Oct 2003 12:51:49
- Got Spark? n/m, RS , Thu, 30 Oct 2003 05:35:08
- No....., Gregg C, Thu, 30 Oct 2003 10:24:23
- Re: LH 2.2 ECU not grounding fuel pump relay..., Simon S, Wed, 29 Oct 2003 22:58:52
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