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code interpretation 900

Friend's car, 94 940T Bosch

Socket 6

1-4-4* No load signal from fuel injection system
Bad fuel injection relay; faulty wiring from LH to EZK; bad LH module
Engine lacks power; stalls; doesn't start or is jerky

What exactly is a 'bad fuel injection relay'? do they mean the rsr/fi relay, or the pump relay? The rsr has been changed with a 'thought to be good' used one, no difference. Can try another later.

What is a 'bad LH module'? ECU?






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