Starting problem

I have a 97 Ford thunderbird LX with the 4.6 liter in it. Every time I go to
start it I have to wait till I hear the fuel pump shut of so the car will
start. If I try to start the car before the fuel pump shuts of it will just
crank and crank but not start. I checked the fuel pressure up on the fuel
injector rail and as soon as I turn the ignition on the pressure goes right
to 41 psi and once the fuel pump shuts of and I start the car it will stay
around 38 psi or so. Any help you all can give me would be greatly
appreciated , Thanks

How about a pressure reading while cranking?

Rob

Not sure I'm reading you right. Sounds normal unless its taking a long
time to get pressure to the injectors. In that case, perhaps it time to
change the fuel filter.

I changed the fuel filter but it still takes about 10 to 15 seconds before
the fuel pump will shut off and then the car will start

the pressure reading while cranking was the same wether the engine started
when I let the pump turn off first or if I tried to start it with the pump
still running

If not obstruction of some sort the next guess would be the pump itself.
I drive a 97 4.6 and have never heard the fuel pump. Please post the
solution when you find it.

Frank

Hmmm, maybe its something electrical. Voltage drop, injectors not
getting current when pump is going full out.

Not even close to the same car...but had similar problem with an '86
Electra 3.8 (one of the first of the FWD Electras)

Always did start...eventually...but if I let the pump run first it
started right up. My interim fix action...DO it that way. Pretend
it's an old diesel with the 15 second glow plugs.

Much later I replaced the in-tank pump & filter sock due to an
unrelated problem. Starting improved greatly.

--Don
Don Byrer KJ5KB
Radar Tech & Smilin' Commercial Pilot Guy
Glider & CFI wannabe
kj5kb-at-hotmail.com

"I have slipped the surly bonds of earth; now if I can just land without bending the gear..."
"Watch out for those doves...<smack-smack-smack-smack...>"

you might try a fuel pressure regulator , it is located on the fuel
rail either beside the shrader valve or on the opposit side of it ,
the pressure may be fine at the valve but after the reg. it might be
fluctuating

If it were my vehicle I would change the fuel filter on my ten year old car.

mike

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2 7th August 02:41 trainfan1 External User Posts: 1	Starting problem How about a pressure reading while cranking? Rob

3 7th August 02:41 f.h. External User Posts: 1	Starting problem Not sure I'm reading you right. Sounds normal unless its taking a long time to get pressure to the injectors. In that case, perhaps it time to change the fuel filter.

4 7th August 02:41 speedspal24 External User Posts: 1	Starting problem I changed the fuel filter but it still takes about 10 to 15 seconds before the fuel pump will shut off and then the car will start

5 7th August 02:41 speedspal24 External User Posts: 1	Starting problem the pressure reading while cranking was the same wether the engine started when I let the pump turn off first or if I tried to start it with the pump still running

6 7th August 02:42 f.h. External User Posts: 1	Starting problem If not obstruction of some sort the next guess would be the pump itself. I drive a 97 4.6 and have never heard the fuel pump. Please post the solution when you find it. Frank

7 7th August 02:42 f.h. External User Posts: 1	Starting problem Hmmm, maybe its something electrical. Voltage drop, injectors not getting current when pump is going full out.

9 7th August 04:52 External User Posts: 1	Starting problem you might try a fuel pressure regulator , it is located on the fuel rail either beside the shrader valve or on the opposit side of it , the pressure may be fine at the valve but after the reg. it might be fluctuating

10 7th August 04:52 mike hunter External User Posts: 1	Starting problem If it were my vehicle I would change the fuel filter on my ten year old car. mike