Question about Volvo 240

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Motor starving for fuel pump ok pressure 100lbs book calls for 44lbs which do I replace the fuel pump relay or pressure regulator engine will not Idle with pedal too floor only 2000rpm

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Clarify your statements. it's not starving for fuel if 100 psi at idle. it's drowning. engines can't "idle" with pedal to floor. just trying to help, but your statements are confusing... are you saying it will only stay running if you floor the gas pedal and then it's only 2000 rpm? that sounds like restricted exhaust or jumped time. I can't determine your problem

Posted on Sep 08, 2010

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Sounds like the regulator is not doing it's job, but you say starving? Is the engine running lean or rich? Is there black smoke coming out the exhaust? I'm thinking high pressure would normally cause a rich condition.

Posted on Sep 08, 2010

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Not getting fuel to motor. i replaced my fuel pump and filter but still nothing. i check the fuse and that's fine as well, is there something I'm just missing


1. You should check that the fuel pump is actually running. Have someone turn the ignition on and then off a few times while you listen with the fuel cap off the tank filler tube. The pump should run for 3 seconds and then stop each time the ignition is turned on. If you cannot hear the pump then you need to check both the fuse(which you say is OK) and the relay that covers the fuel pump circuit. The relay should click when you turn the ignition on and off. If it does not you need to replace it as no power will get to the pump.

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You have to test the pressure off your fuel pump with a fuel pressure gauge. It should have more than 60 psi of pressure, if it's a lot less than that replace your fuel pump. If the fuel pump pressure it's ok, then test the pressure with the fuel preasure gauge after the fuel pressure regulator it must have around 39 psi, if there is a lot more or a lot less, then replace the fuel pressure regulator it cost around $50. If your car works good when it's cold but it starts failing when engine hot, it's pretty certain that you need a fuel pump replace. To corroborate this just test your fuel pump pressure when the engine is cold and then when your engine is hot. It must have the same pressure.

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your engine's starving for fuel. your fuel pump may be bad. if your engine starts ok and it only idles fine,the fuel pump pressure may not be correct. the fuel pump pressure should be around 180lbs to the motor.a bad fuel pump can either quit pumping,or it may only pump just enough to start the engine,but not produce enough fuel to run it down the road.the fuel pumps located inside the gas tank under the car. most shops guage the price of removal and replacement of the fuel pump on how much fuels in the gas tank,the more fuel,the heavier the gas tank. a full gas tank can be super heavy and hard to handle under the vehicle. suggest that you call around local shops for a price of replacement fuel pump.also call local parts places such as auto zone or advance auto parts for prices of the fuel pump,that way you can guage the price of the pump against the labor the shops charge you. hope this helps and thank you for choosing fixya.com

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Also probably would be a good idea to replace you air filter.

Good luck!

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1 Answer

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Starving for fuel?


have you checked your fuel pressure regulator, I had the same problem and this is one that cost me about $60-$80 to fix, the fuel pressure regulator right on top of the engine that stupid round little piece if it clogs you starve your engine and it sips fuel a little bit, just enough for it to start, then it shuts off..so try replacing the the fuel pressure regulator.. that's where i would start there are more things then this that cause your car and engine to starve itself of fuel. let me know if this works, if not we'll approach it small problems at a time.

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