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V90 Cranks but Won't Start S90-V90

posted by  Volvodad on  Sun Jul 31 15:11 CST 2016
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last visit: Thu Oct 23 16:18 CST 2014
[RELATED]

The ignition system sends a signal to the ECU that the engine is rotating, and the ECU then enables the fuel pump via the FP relay. If you crash and the engine stops, the fuel pumps stop.

I have pulled the relays by wiggling them while exerting a steady pull. They have been in there a long time and there may be some "corrosion welding" of the pins to the relay board.
--
Bob: Son's XC70, my 83 244DL, 89 745 (Chev LT-1 V8), 98 S90 (recently sold) and 2010 XC60. Also '77 MGB and four old motorcycles






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