Helllllppppppp!

Purchased a 1991 volvo 740 with 75k five months ago. Prior to purchase it was in shop for a new fuel pump. Four months after my purchase, it quit on me and would not start. My trusty mechanic said it was the fuel pump and put on another one. Last night, under same weather conditions when it stopped on me while driving before, it did it again. Won't start, weather was very cold, little fuel in the tank. I'll bet it is the fuel pump AGAIN...? Could it be? If so, what is causing this, or what ELSE could be the problem? I THINK it has 2 pumps. HELP![]Thank you for your advice and answer to relford@netzero.net!

 

What year is it?
Does your car have one or 2 pumps?

 

Thank you! Forgot to say the year... It is a 1991 740, and I think it has two pumps, one in-tank and one near the filter. How can I know this for sure. I am not a mechanic![&:]

Thank you SO much for anything you can give me that will help!!!

Hairyg

 

Tech, I moved this thread from New Members Area. Notified the original poster.


JPN

 

First, get thee down to Autozone, Kragen or NAPA and get a manual! It will cost you about $20 and will save you hundreds of dollars.

The manual shows just one fuel pump in the gas tank. It seems highly unlikely for a pump to fail so soon, even an aftermarket pump. My 740 has some 210,000 miles on it and the pump is original. I would suggest looking at other possible causes.

My first thought would be something electrical, such as the fuel pump relay which tells the pump to turn on and off or the fuel pump fuse. Another possiblity would be the Mass Air Sensor.

What exactly happened when the car quit? How fast were you going; how much fuel was in the tank; how cold was it; had you had a problem getting the car to start that morning; and were your lights any dimmer than usual?

It's going to be very tough to tell for sure what's wrong without having the car to work on. I would suggest that you look around for a repair shop that has a designation as a Bosch certified repair center or that they have Bosch master certified technicians. A shop with that certification can get to the bottom of the problem and save you time and money.

Bill

 

My 1990 740 is the regina system, it uses one pump.

Many 740's use the Bosch system with 2 pumps.

If you have a typical cylindrical shaped coil you have the Bosch system.

If the coil is a square unit its Regina.

The Bosch system is best fixed by replacing both pumps, if the feed pump (in tank) goes out (or weak) it will kill the main pump (under drivers door , alongside frame under car).

A lazy mechanic will just replace the under car main pump, but the weak in tank pump , the cause of the problem is still there. Pumps are cheap enough at autozone, get the Haynes manual and just do it yourself.

 

Just want to thank all of you for your responses. This has been very helpful.

HG

 

hairyg, I have a 91 740 regina system, it has 1 in tank fuel pump. You could try turning the key to the II position (not starting the car, radio, fan, and AC off) you should be able to hear the fuel pump come on for about a 1.5 seconds to pressure up the fuel system. I believe in your fuse box the #1 fuse is fuel pump, check that.

 

Hello and help!

My 91 740 leaks water when it rains. The water appears to be coming in through the slots of the pedals just underneath the dashboard. Any ideas how the water is getting through and where and how and where I can get to such a spot where it might be leaking?

 

Visit www.stepbystepvolvo.com for diagnostic guide on 740/940 no-starts.

 

check for spark when cranking, check for gas at plugs when cranking, go from there..

 

Try keeping fuel in the tank.... you mentioned in a previous post that the fuel was very low. Running the fuel lower than 5/8ths allows the fuel pump in tank to not be submirsed anymore and it heats up and fails.