although with it running better with less fuel in the tank, you might try one of those products that gets the water out of your fuel. 5 dollar bottle worth a shot i guess... BTw- did you ever try cleaning the MAF?

 

yes.
also, it doesnt do it when i first start the truck.
i start it. drive literally 35 feet. to a light. turn left go another 100 feet. turn left. about about 100feet later it sputters.

So it may be a fuel pressure issue? perhaps when i first start the truck and thefuel pump primes at runs fine but than somehow the fuel psi falls below 30? my truck is supposed to run oem at about 30-40psi textbook.
so im thinking its not the fuel injectors, but rather the fuel pressure regulator or pump. what do you think?

 

I'd go for the regulator firstbecause didn't you already test the pump.

 

no i havent tested the pump. lol did i say that? sry haha. but when you say go for it. do you mean replace or check?

im not 100% but i think there like 70$. also,when i go to remove it will it have pressurized fuel in it like some of the other lines?

 

i think so too, i don't think it's a fuel related thing, i think it's a loose connection, a false contact somewhere

 

Oh i thoght you said you tested it i didn't reread the whole post sorry but yeah id check it out first before you go after the pump.

 

ok, what should i check in the ignition system? lol (Dont worry im not getting confused at all *Scribbles check list)

So far. ive rechecked all wires. all plugs. ignition coils are kinda hard to test. ive checked to make sure no batter or ground lines were loose. checked battery and alt again (as it turns out im an idiot and read my meter wrong. said the same thing but the 0 was on the other side. so instead of only having really low voltage i actually had 13 solid. lol.) made sure no wires were loose. now dead draw on the battery. all fuses in order and relays functioning. spark test in dark. anything i can think of.

 

see post #45

 

try going out there with a peice of sand paper and sanding down all the grounds and places where they contact to make sure it's no getting interupted by paint or rust, and you said you checked the battery leads, did you clean them? to do a proper check of the fuel system you need a guage that hooks into the shrader valve on the fuel rail. it should be around 37 PSI running and about 42 with the vaccum line to the FPR unplugged. i don't reccomed raplaceing anything without doing tests first. just a waste of money! :D
p.s. usually when a FPR fails it leads to a very rich running condition and probably wouldn't show the symptoms you're having. but a failing fuel pump or a partially plugged filter are possibilities.

 

mine sputters if im under 2k rpm but i have a 4.0 auto

 

mine seems a okay up until half throttle. after that it goes ape s**t

 

OBDII Sensor read i threw an O2 sensor and a few other things. replaced MAF and all is well with hesitating and chugging. all seems to be running normally again, except i still have this odd sounding exhaust as if its still popping.

 

whenever you replace any electrical crap you need to re-set the computer...

 

Any new word on your problem? Fixed yet?

 

I read your post from page 1 to page 3. It sounds exactly like what my truck has been doing, of and on for about a year. I have changed the timing belt, plugs, wires, ignition coils, MAF, O2 sensor. None of which improved the performance.

The problem has continously got worse until it would hardly run last week. I took it to a mechanic which has a good reputation for troubleshooting electrical issues. In less than an couple hours he diagnosed the problem. It was the ignition contol module. $250.00. I picked the truck up Friday and it is running about like it did when I bought it in '94.

The mechanic told me there were still some codes in the computer which shoud MAF sensor isssues. He said this was common w/ Fords.

You may want to find one at a jucnk yard before you sink $250 in a new one. Hope this helps you. Let me know if this fixes your truck.

 

I watched a video on youtube and the ground for the fuel pump relay is a common issue. To solve this problem run a wire from a good ground source to the pin on the relay that's suppose to be grounded!!

 

get a can of thottle body cleaner or co2 air duster start the engine spray each vacum like and lisen for idle change that the way i find leaks

 

oh i didnt even pay attion to the dates sorry lol