Question about 1994 Ford Mustang

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Cant get enough fuel pressure to run properly

My 94 mustang has 30 psi of fuel pressure. car starts out fine and then after a couple of minutes of driving starts bucking and backfiring at engine. then kicks in and runs fine again. i change the fuel pump, fuel filters, fuel regulator and did a complete tune up. still has problem.

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I have a 94 mustang and the ac compressor went out on it and i have replaced the compressor and i need to replacer the dryer. I know that its not contaminated got the part for it and im not able to remove the dryer from the hose or the fire wall. i can pull on it and it still wont come out. the same with the hose that connects to the compressor. is there a special way to take it off or am i incompantant

Posted on Jul 27, 2009

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May have to run in line fuel pressure gauge to determine if the fuel is losing pressure and causing this fault or wether you need to look else where like constant injector pulse,air flow meter,faulty distributor etc.

Posted on Feb 15, 2009

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1 Answer

97 mustang power loss at 4000 rpm seems like it wants to go but won't doent do it when cold only after runing for about 15 minutes seems like it bogs down


Sounds like a weak fuel pump or clogged fuel filter.Check your fuel pressure it should be 30-45 psi with key on and engine off.

Feb 24, 2012 | 1997 Ford Mustang Cobra

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1996 4.3 wont start. Turns over, Spark OK, fuel 55psi


Fuel pressure is a little low. Will it start with a couple shots of carb spray in the throttle body? If it does and continues to run than the fuel pump is not providing enough pressure to to open the mechanical poppet valves on the end of the injectors. minimum fuel pressure is 58 psi. One PSI below spec is enough to make it not start.

Also check to make sure there is spark at each cylinder. just because there is spark at the ignition coil does not mean it is getting the the spark plugs. you may have a bad cap or a rotor that is burned through.

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Mustang stalls when trying to drive and will shut down


Measure fuel pressure on injector rail - should be 38 to 40 psi. If low or fluctuating, then replace regulator. Another possibility is the in-tank filter being clogged - rare I know, but trash in the gas tank and it's clogged.

May 13, 2010 | 1986 Ford Mustang

1 Answer

Can not get it going


Key on pressure should be between 40.5 - 47 psi. Running should be 30 - 44 psi. So possibly the pump is starting to get weak.

Mar 29, 2010 | 1988 Ford Mustang

1 Answer

When i start my 94 mustang it chugs for about a minute then it is fine. i think its a sensor somewhere but im not sure


U may have a defective fuel pump check valve, if this is the case the system looses pressure after the engine is shut off and then causes this problem u are having. to check this u must hook up a fuel pressure test gauge the fuel pressure test port on the top of the engine, it looks like a metal tire valve, this gauge cost's around $20.00 and is well worth the money, after the gague is screwed onto the test port run the engine and record the fuel pressure reading, then shut the engine down, the pressure should remove close to the running reading, if it drops more than 3 PSI you have a problem and need to replace the fuel pump which is located inside the gas tank.

May 11, 2009 | 1994 Ford Mustang

2 Answers

1988 mustang 5.0 efi flooding engine will not start fuel pump constantly running, fuel reg. replaced will actually fill and with fuel and only fire if pedal is to the floor?


Step one
Click the key forward BUT don't start the car listen for fuel pump to pressurize and shut off. But if the pump keeps running change the fuel pump relay switch under drivers seat. If its pressurizing and shuts off then its not your fuel pump. Fuel pressure at rail when idling is 30 psi.
Let me know what happens cause I know alot about Stangs had 2 5.0

Apr 21, 2009 | 1988 Ford Mustang

1 Answer

Will not start


your fuel pressure should be 20-30 psi. you dont sound like you are actually getting enough psi
especially if it will run on ether

hope2help shack

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Truck would not start, gave it a blast of ether, it started


get your self a fuel pressure tester, hook it up to the fuel rail, you should get at least 30 psi with key on, 30 to 45 psi with engine running.

Mar 11, 2009 | 1996 GMC Suburban

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