ok i had my fuel pump and whole assembly unit changed several times i went to junk yard to aquire 3 whole sending units at diffrent months apart from each other and i beleive they keep going bad and i have bought 3 diffrent fuel pump motors for around 45$ and had those installed as well car runs fine for about 1'3 months time then bam the car turns over but wont start and then when i replace it it works for 1'3 months then i always have to install a new one what vouod be the problem causing the fuel pump to go bad so quickly?

 

crap in the bottom of your gas tank?

bad wiring?

 

I wouldn't install any fuel pump from the junkyard as there is no telling whether it is any better than the one you are removing. I am assuming that you are talking about the in-tank pump but I have never had a failed in-tank pump cause a no start condition.

When they fail, did you bench test them after pulling it out? Have you verified that the pump isn't running before you pull it out?

 

year and model? is it a regina system one pump vs bosch two pumps?

 

i had took it to a shop and they said there was a metal peiece from the fuel pump floating in the gas tank and they removed it so i took it to another mechanic and got another whole sending unit and he said it was good but the motor was bad so i got another motor and he installed it and it was working for one month then car wouldent turn on its a 1993 940 volvo one fuel pump

 

Apparently you are going to have to buy a new Volvo pump since the other methods haven't worked. It's about $130 retail from the Volvo dealer. You must specify that it is for a Regina system. Many "professionals" assume that all Volvos have a Bosch system and throw a wrong pump in there with less than optimal results.

 

a bosch booster pump without a main pump wouldn't even start once, nowhere near enough fuel pressure.

I hear you can use the single-bosch-pumps from a late 960 or 850 with good results on regina systems. 850's also run 44 PSI or so....

 

so perhaps i have a bosch fuel pump installed and not regina and this could be causing the problem how do i know if my 1993 940 non turbo is regina or bosch?

 

It's possible if you are having such bad luck with pumps... If you have ONE pump, you have a Regina system, (except in 1995 models).

 

a bosch lh system has a mass air flow sensor in the air path between the air filter box and the throttle body that says Bosch, while a regina system has a pressure sensor that doesn't look like much of anything.

bosch uses a conventional round ignition coil, while regina uses a square 'transformer' like pole with integrated power module.

 

well i have found a regina fuel pump non turbo and its for a 1991 1992 940 volvo will this fuel pump work on a 1993 940 volvo?

 

it should.

According to VADIS (the older Volvo part catalog), a 1993 Regina uses fuel pump 3507736, or complete pump+sender assembly 6842607. a 1992 Regina uses the same pump, but has a different PN 3507595 for the combined tank unit complete (pump+sender+etc)

 

ok thanks