[Intake]

Hi ive got a 96 mustang gt 4.6L automatic...every time i try to start it, it starts but then dies.. Like it wants to start but dies again.. Could it be the fuel pump or the fuel filter?? I Just got it and it was out of gas, I put gas in it and it just does what i explained to you guys..Its getting gas up top just not enough to make it start..Or could it be flooded??..Any help..P.s Mil,177,123 ON the car now..

[ReverendDexter]

If it's flooded, it generally won't fire at all, just crank. I'd replace your fuel filter first before you get all antsy-in-your-pantsys about the pump.

[Skidmark]

Did you say that you just got it? and it was out of gas? This is an EFI car right?

If so, sounds like either a weak fuel pump, clogged filter. Can you hear the pump make a high pitched sound for a few seconds with just the key turned to the "on" position? If not hunt down the fuel pump relay.

[97_4.6L_Stang]

could be an injector problem since is EFI. check for power to the injectors. is not likely that they all went bad at the same time.

[Casper98GT]

how many times have you tried to start it ?? Was it bone dry ?

[Intake]

I can hear the pump in the tank but its not a high sound it is normal..It will start then shut off.. I Got a new filter today so all try that and get back to you thanks..OO it was bone dry..I just put some BG 44k injector cleaner in it, Cost 24.95 a bottle works wonders on injectors..you can find it at Baxtors auto parts..but thats up here in washington seattle.. The story on the car is i sold it and it went to toweing so i got it back for $1000 bucks..Sold it for $4500 and he wants me to sale it and give him the money, yea right..Im keeping the stang... I was hurt when i let it go.Steve..

[Trick Tuners]

Originally Posted by ReverendDexter If it's flooded

Haha, good one. too bad EFI cant get flooded unless its done with a real bad tune.

[Coltdog]

Yeah, real hard to flood a fuel injected motor...

Has the car been in storage for awhile prior to you trying to start it? If so, I would check the exhaust system for anything plugging it up - like mice or a mouse nest. This sort of thing does happen while cars are in storage and/or haven't been driven for quite awhile.

[ILUVSTANGS]

CHECK FOR FUEL PRESSURE ON THE FUEL PRESSURE REGULATOR. ITS ON THE FUEL RAIL.
CAREFUL IT WILL SQUIRT OUT GAS SO WEAR EYE PROTECTION. JUST STICK A SMALL FLAT HEAD SCREW DRIVER ( AFTER YOU REMOVE THE CAP) TO MOVE THE VALVE STEM. IF GAS SHOOTS OUT THEN THEN THAT MEANS YOU HAVE FUEL PRESSURE. BUT YOU STILL NEED TO FIND OUT EXACTLY HOW MUCH PRESSURE YOU HAVE? YOU WILL STILL NEED TO CONNECT A FUEL PRESSURE REGULATOR TO FIND OUT........
GOOD LUCK

[Casper98GT]

Haha, good one. too bad EFI cant get flooded unless its done with a real bad tune.

Obviously you have never worked at a dealership. trust me, they can be flodded, and every winter i usually have to do about 5 of them.

[ILUVSTANGS]

my bad, I did'nt see that you said that gas was getting to the top
but any ways is the car stock??? and still check fuel pressure and also since it say check the air filter and remove it and also check the throttle body.. you never know if an animal made a home in there... we have had rats in the pcm.. ate right through the wires...talk about an expensive repair....back to the subject..the person who owned the car might have not take care of it and there might be an air issue...seen plenty of air filters that have never been changed in 50k miles or more....

[1slo5.0]

You need to sort this stuff out before you go any further. Your best bet would be to take it in. A good shop will have diagnostic books that will eliminate possibilities and find the problem quickly.


P0123 Code - Throttle Position Sensor/Switch A Circuit High Input

Causes:

TPS not mounted securely
TPS circuit short to ground or another wire
Faulty TPS
Damaged computer (PCM)


P0177 Fuel Composition Sensor Circuit Range/Performance