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94 850 fuel pump circuit 850 1994

Hello everyone, I need help with my Volvo 850. It had an intermittent starting problem for a long time, which only happened when hot. I figured out that it was not getting power to the fuel pump during this condition. I thought it was probably the fuel computer so i replaced it with a junk yard one (found one for $40.00) This has not solved the problem. Does any one know which relay runs the fuel pump, and what else is involved in the circuit. I am currently running a wire from my cigarette lighter to the pump which works fine but is annoying.
Thanks for any assistance and or pointers.
alek






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