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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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Oct 23rd, 2020, 13:06 | #21 |
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That bit i totally agree on and to be fair, that's down to Bosch as they designed the L/LE and later Jetronic systems to be "add-on" units. As such, it was a reactive design from Volvo so probably unfair to blame them entirely.
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Oct 23rd, 2020, 15:26 | #22 |
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I finished work a bit earlier than I thought so re-fitted the battery and same fault.
Had a look at the fuel pump relay and the solder joints look ok but who knows. Had 2 copper windings and nothing looked burnt/melted solder. when sitting in the drivers seat I hear no pump buzzing/priming. I'll try listening with fuel flap open. I tried connecting a wire to the battery positive to the white/red striped wire at the coil and no difference, unless no contact made or wrong side. Tried several times. Next thing I'll try is seeing if there is voltage at the fuel pump. Need to clear the car out! James. |
Oct 23rd, 2020, 16:01 | #23 | |
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Oct 23rd, 2020, 16:08 | #24 |
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Surely we have already estabished the coil 12V is fine because the rpm needle is moving?
In any case isn't it better to measure first? |
Oct 23rd, 2020, 17:27 | #25 |
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Had a play with it.
I disconnected each HT lead in turn and fitted an old spark plug. Each one had a spark and each doing a zap zap noise. Took a spark plug out and its dry and slight fuel smell. Suspect no fuel delivery? Tomorrow will find fuel pump and check voltage. Is pump under back seat? Going to order a fuel relay unless anyone has a known working unit. What's your thoughts? Should I try the coil wire again or does it mean as the HT leads produce a spark ignition is probably ok? Fixed my rear wash. Pipe had come off behind rear seat mounting trim. A fiddle dismantling and threading pipe through and back onto rigid black pipe. James Last edited by volvo always; Oct 23rd, 2020 at 17:37. |
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Oct 23rd, 2020, 17:37 | #26 | |
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In your car it's in the tank James
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Oct 23rd, 2020, 18:19 | #27 |
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Oct 23rd, 2020, 20:11 | #28 | ||
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If you have a test lamp, rig it up to test the pink and black wires, look over your shoulder so you can see the test lamp and turn the ignition on - the lamp should light for 1-2 seconds and go out but come back on if you turn the key to position 3 to crank the engine.
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Oct 23rd, 2020, 20:38 | #29 | |
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Was it under a black metal plate secured by 4 bolts? to the side of the passenger wheel arch? Under the separate boot floor trim. Ie fixed part in far rear boot. If so saw fuel filler pipe and various hoses. Everything very dirty! Big jubilee clip securing something! James. |
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Oct 23rd, 2020, 21:13 | #30 | |
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The cubby hole is this one : Should be a small loop to lift it up at the wheelarch end, if not, lift the flap over the spare wheel and lift the front end of the cubby hole cover near the wheelarch.
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