Question about 1990 Volvo 740

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Volvo 740 gle 1990

Dont run the fuel pump and relay its ok i dont have power the my lines injector i dont know why?

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  • medvedeu_bog Feb 05, 2009

    so mi fuse its ok fuel pump and relay run just my lines injector dont have power for the open the injector

  • medvedeu_bog Feb 05, 2009

    so what is problem whit my car

    ?

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Check under the hood for a box containing your fusible links (they look like large blade fuses in most modern vehicles). The fuel pump relay only operates the fuel pump. It doesn't provide power to the rest of the fuel system. Odds are the fuse for the injection system is blown. The inside of the cover of most fusible link cases usually has a diagram which tells what each fuse is. The easiest thing to do is locate that fuse and remove it (with the vehicle off of course) and visually inspect to see if it's blown. If it is, simply replace it and see if that corrects your problem. While you're under the hood you might want to trace the wires back to their origin and check to be sure the harness is not rubbing or chafing against anything that might have caused wires to break and short. It's rare for those fusible links to blow without a reason.

Posted on Feb 05, 2009

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  • Randall LaClaire Feb 05, 2009

    Right. Basically your fuel pump is probably fine and pushing the fuel, but if the fuse to the injection system is blown there is no power to the injectors to control them, so it's the same result as if the pump weren't working. No fuel will get to the cylinders, so your car won't start.

  • Randall LaClaire Feb 06, 2009

    Well, since you rated me as "thanks for trying" before we even got the problem completely clarified, I don't think I can help you any further. I'd have appreciated it if you'd have at least given me a chance to help you a little before you decided I wasn't all that helpful :)

  • hot88vette Dec 24, 2010

    please help, i realize this is 2 yrs later, but, here goes, i have an 87 740 turbo wagon, that has an intermitent no start issue, i've replaced both fuel pumps and the pump relay, the car will start fine for a week, than it won't start, i have no power at the injectors when checked with test light, if i come back to it later, it will start right up!!, IT'S driven me nuts, is there a relay for the injectors?? if so, where is it located? thank you for ANY help or advice, i really like this car, but I'm ready to dump it, 'cause it's not dependable

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