Question about 1986 Volvo 740

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1988 volvo 740...will start... runs at lowspeed

1988 volvo 740...will start... runs at low speed..put a load on it and she cuts out and dies...restarts after 15 min or so... replaced the intank fuel pump, fuel filter, new gas hose line. but, problem still there. Any suggestions?

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  • kevbonreimer Jun 24, 2009

    no, not at all.

  • kevbonreimer Jul 24, 2009

    fixed the was the air intake hose it was soft and sucked shut. only wished i saw that first before replacing all the other parts!



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I have a potential solution, but only if you give good thumbs up though:)
It's the fuel pump relay, located behind the ashtray.
It's the one on the right, of the two.
If you gently twist it l/r, while turning the motor over.
Happy motoring

Posted on Jul 24, 2009

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Throttle switches or ecm

Posted on Jul 24, 2009

  • paul campbell Jul 24, 2009

    didnt even think of that they usually crack first


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Posted on Jun 24, 2009

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Remove the phillips screw that holds the cigarette lighter in place. Now remove the ash tray. Next, pull the storage tray and cigarette lighter assembly and lay to the side.
You will see two trays, one with the fuses and one with the relays. The one you want to look at is the relay tray.
On the far left side of the tray and the 2nd relay from the back is the relay that engages the ignition when you turn the key to the start/ Run position.
It is very likely that is simply a bad connection where the relay pprongs plug into the socket in the relay tray.
wiggle and pull up on the relay assembly until it comes out of the tray.
Now just tweek the prongs slightly on the relay so they will make a firmer contact in the socket.
Now put the relay back in the same position it was in originally. Pull it back out and put it back in a couple of times to clean any corrosion oin the contact prongs.
Try to start the car now. This will probably correct the problem.
If not you may have to replace the relay because it may be defective.

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