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Some times car wont start and has no fuel pressure?

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2005-09-19 19:31:50
2005-09-19 19:31:50

what kind of car? could be sucurity issue, does sucurity ligth flash if equipped.gmjim its a 94 e320 6cyl. it has problem starting and no fue; preshure. but if we un hook computer let sit for min then replug it will start and we replaced computer still does it

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INSTALL A NEW FUEL FILTER FIRST. IF THAT DOESN'T WORK CHECK FOR FUEL PRESSURE WHEN YOU TURN THE IGNITION ON. THE PUMP RUNS FOR 10 SECONDS AT FIRST TO BUILD FUEL PRESSURE. IF NO PRESSURE IS THERE AFTER THE PUMP RUNS FOR 10 SECONDS REPLACE THE PUMP.

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Don't know what your vehicle is but if it is fuel injected, it may have some fuel pressure but if it doesn't have the required amount of fuel pressure it isn't going to start. Do a fuel pressure test, you may have a bad fuel pump or bad fuel pressure regulator. Also check all the fuses. Also check the timing belt if it has one, it may have jumped or broke.

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minimum fuel pressure is 52 lbs to start

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Fuel pump problem-To rule out a failing fuel pump -you must check the fuel pressure with a fuel pressure tester if its within specs-you start here

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Start with a fuel pump pressure test.

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You may have some fuel pressure but not enough. Do a pressure test with a fuel pressure test gauge, it should have 41 to 47 psi to properly run the engine. Sorry, But that engine should have 9 to 13 LBS. of fuel pressure. No lower are higher are you will have problems.

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you have a lack of fuel or fuel pressure troubler

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A damaged fuel pressure regulator can cause a car not to start.

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Get a can of throttle body cleaner.....spray throttle body cleaner into the throttle body.....open the blade and shoot some into the throttle body. Then try to start the car...if it starts, then you have a fuel delivery problem. Hook a fuel pressure gauge to the fuel rail and just turn the key on and see what pressure you get. If no pressure then it is either your fuel pump OR a clogged fuel filter. You can then put a new fuel filter on, test the pressure again and if still no pressure, you are pretty much looking at the fuel pump. If you get fuel pressure at the fuel rail and it still won't start then you probably have an injector problem.

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pumping probably isn't helping if the truck has fuel injection. extended cold crank times are often caused by a bad cold start injector or the control for the injector. also if there is no fuel pressure (i.e. a fuel pressure regulator that is leaking back into the tank as the car sits), it will take awhile to start.

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Most likely a fuel issue. Hook up a pressure tester on the fuel line and test it. It should come up to pressure immediately. If it takes a few seconds or longer then something is wrong.

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The fuel pressure regulator controls fuel pressure at the fuel injectors. It uses vacuum pressure to control the pressure. It is positioned on the end of the fuel rail. If they leak, fuel will go into vacuum line causing hesitation on start-up and the smell of gas at exhaust. Warning, Fuel is under pressure. Disconnect battery and release pressure before replacement.

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Remove the fuel pump and relieve the fuel system pressure. Disconnect the fuel line then fix the fuel pressure gauge. Reconnect the fuse to the fuel pump and start the engine to check leakage. Tidy the surrounding of the fuel pressure regulator.

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Fuel pressure should be around 40. If the injectors are not getting power it will not start. Start with a crank sensor first.

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try changing the fuel pressure regulator which is located on the front fuel rail. when you put the new one in make sure you put some lubricant on the o ring to keep from damaging it. Make sure the vacuum hose going to the fuel pressure regulator is good. The vacuum hoses wear/collapse and break - they can start acting up with just a leak and intermittent problem, but ultimately break all the way => no-start.

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If the fuel system is still holding pressure the car will start and run until the fuel runs out, The relay turns on the fuel pump.

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Noisy fuel pump, stalling, or engine will not start and you have no fuel pressure.

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change your fuel filter and test the fuel pressure. pump pressure 60 psi line pressure after the fuel regulator on TBI 11 TO 13 Psi.

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Does it have a check engine light? i so Scan the computer for code/s. Check the fuel pressure if its within specs with a fuel pressure tester-start here

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Check for proper fuel pressure in the 1997 Talon. The engine appears to be starving for fuel and only has enough pressure to start.

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It could be a partially blocked air filter, fuel filter, fuel pressure regulator (if your vehicle has one) or low fuel pressure. Use a fuel line pressure gauge to see what the pressure is. You may need to look up the PROPER pressure for your vehicle, then compare it to the actual pressure. If it's low, check the fuel filter and/or fuel pump.


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