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mysterious no start S70 1999

posted by  someone claiming to be ksg on  Mon Apr 30 02:58 CST 2007 [RELATED]

You oculd try a couple of things -
If fuel pump, connections, or relay are bad the car should not only occasionally fail to start but might die or hesitate badly once in a while, while running. Does this happen? While the car is running you might poke around or tap any of the fuel pump wiring, relay, fuses etc that are relevant and see if you can make the engine die.

Also might be worth measuring the fuel pressure to see if it is constant or fluctuating - that could show if the pump is marginal or failing even though drawing current.

Are you sure it's a fuel problem, not ignition etc? Camshaft or crankshaft position sensors or their wiring could be at issue. Also coolant temp sensor.

Should we assume you don't have any trouble codes? Or any symptoms on the engine once it does run? Also do all of the accessories that would be controlled by the main relay work ok? That is, is it a primary power problem, not just fuel pump?






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New mysterious no start [S70][1999]
posted by  SteveSC  on Sat Apr 28 10:20 CST 2007 >


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