940 non tubo wagon fuel pump

Lou Rosenbaum · Post by **Lou Rosenbaum** » 27 Dec 2009, 07:03

what problems could you expect if you used a Bosch pump, but the car is
Rex/Regina (bright blue injectors/coil is box like)? Could it work at first then stop?

Post by **billofdurham** » 27 Dec 2009, 11:50

By Bosch pump do you mean an external pump mounted under the car?
Would this be in addition to or replacing the high pressure in-tank pump?

An external Bosch pump is high pressure at the outlet but struggles to get the fuel from the tank. Cue the in-tank, low pressure priming pump.

Bill.

Lou Rosenbaum · Post by **Lou Rosenbaum** » 27 Dec 2009, 13:47

sorry for the misinformation. I am talking about the in tank pump. The car only has the one pump.Broke down out of town had to have somebody I did not know fix it.The car showed no fuel pressure, so he changed the in tank pump.He said it was a Bosch pump.It is 3 weeks later and the car stopped again and shows no fuel pressure.Now I have the car at home,just wondered if he could have put the wrong pump in,would it even fit ?If it could fit could it be the problem? I am going to get a Regina sending unit witch includes the pump. Just trying to figure out if this other guy owes me the price of the pump

Post by **billofdurham** » 27 Dec 2009, 16:02

I was wondering if you intended replacing the in-tank pump with an external which wouldn't have worked.

I have looked at the whole range of Bosch pumps and the only in-tank pump I can find is for the Bosch system which uses a low pressure priming pump and a high pressure main pump.

You should be asking questions as it would seem that the pump fitted could be wrong.

Bill.

Lou Rosenbaum · Post by **Lou Rosenbaum** » 28 Dec 2009, 07:07

thanks Bill as always your info is very helpful. This Volvo is very expensive to maintain,you make it a lot less expensive. I have been able to do a great deal of the work since you have been answering my questions. When I have to have others do the work I have been able to ask the right question and save big. Thanks again Lou R

So I am correct, there is only the one fuel pump ,and it's in the tank?

Post by **billofdurham** » 28 Dec 2009, 12:15

On the Regina there is only one pump, high pressure, in the tank. Replacing that pump with a low pressure priming pump will work for a short time but, (and this is my opinion only), it will burn out.

Bill.