Jhoward

I have been puzzled by the way my car has been running. It is a 89 5.0HO with 160k miles. It hesitateswhen you areat constant throttlewhile in gear, not inneutral.It idles fine. Keep in mind, it doesn't always do this. I noticed when it's warmer outside, it doesn't hesitate.
It has the blue injectors, which I assume are 24lb. I am pretty sure the motor is stock. It has aBBKCAI andnoCats. still has EGR hooked up.
I also cleaned the IAC, and MAF. Recently installed new distributor, cap, rotor, wires, plugs, fuel filterand PCV. I am stumped. I have been tinkering with this for a while. I checked for vaccuum leaks, but didn't find any. My CL is not on. I also had a mechanic look at it and he didn't come up with anything.
I am thinking maybe the injectors are too big??
Thanks in advance



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kalash

24 lb injectors aint that big, worst problem that i could see from larger injectors would be running rich and fowling plugs.

fuel filter is running through my mind.

94ford5liter

Not the injectors. Your fuel pump could be going bad with 160k on the car. Your coil could be going bad as well.

Jhoward

I thought the same, so I put a new filter in this past weekend. It's still doing it.

Jhoward

I also put a new distributor/with coil. Still stumped.

94ford5liter

is your fuel pump really loud when the car is sitting?

kalash

whats the fuel pressure at the rail?

Jhoward

Fuel pump is not abnormally loud. I hear it turn on, but I would say its quiet. Can I check fuel pressure at the Schrader valve with a PSI gauge or do I need a certain tool.
Thanks for help

kalash

dont use a tire pressure gauge i can tell you that much.


wait, actually, i take that back. use a tire pressure gauge but get a buddy to video tape it.

Jhoward

Ha, that's funny! I guess I will have to get it tested somewhere or bya pressure test.