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New developments after diagnosis. Fuel Delivery Problem- please help

So I diagnosed my problem some more. It seems as if it is not an electrical issue. I checked the fuel pump relay and it works, all fuses are fine, and I tested for voltage at the injectors while cranking and they were also working. I think there's something wrong with the fuel pump, a loose contact or otherwise. Does anyone have a diagram of how the fuel system works or where what is. It would be very helpful in trying to find out what's wrong. Is the fuel pump in the tank? Can I check it's voltage? Any help is appreciated.. again. Thanks!

Mike








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New developments after diagnosis. Fuel Delivery Problem- please help

It's a 240. '87.

The fuse is fine, the injectors are getting voltage but no fuel. I took off the gas line coming into the fuel rail and it was completely dry. There's just no fuel being pumped into the line. All of the fuses/relays have been checked and are working properly. I guess I was thinking about checking the fuel pump for proper operation next. If I dont' figure it out i'll take it in somewhere next week, it's simply draging on too long with no results. Oh well...








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New developments after diagnosis. Fuel Delivery Problem- please help

It would seem your fuel pumps are not running. How did you check the relay? You should understand that just because it clicks that does not mean it is passing sufficient current to the pumps. Have you resoldered it? This is recommended for any suspected pump problems.
--
David Hunter








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What year and model of Volvo? nmi








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New developments after diagnosis. Fuel Delivery Problem- please help

I guess you have a no-start problem?

Is this a 240? If so, check for a fuseholder near the battery, mounted on the fender. It's probably white, and corroded. Check to make sure both the fuseholder and the fuse are clean and tight. This causes all sorts of problems.

As far as the fuel pumps- most Volvos there are two, one in tank, one under the car. Loose contact is possible, I've never seen it. Check the grounding points though, it's possible those are corroded.

As far as a diagram, either a Haynes or Bentley manual are the best, right after Volvo Service manuals, ordered in sections.







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