89 f250 7.5l was drivin home 2 day was in 5 gear when suddenly truck started 2 spit and sputter like t was runing out of fuel but this was right after i left the gas station lol. s i clutched and stabed the throttle and it came back so i put it back in gear again and continued on got a km or so and it started again??????? it seem 2 only do it under load???? it idels fine??? anyideas

 

Fuel pressure? Spark? Codes? Artesians?...almost anything

 

have not put a fuel pressure gauge on it yet. not putting out any codes pretty sure it has spark because it idles fine??

 

Was the engine hot or cold? I fit does it when hot but not when cold it could be the coil is starting to go. Do you have dual tanks and if so does it do it on one but not the other? If it only does it on one tank than it's probably a fuel pump.

If it's right after getting gas is could also be water in the fuel so you can try an additive like HEAT. Other simple things could be badly worn spark plugs or plugged fuel filter.

 

At the very least you should be getting the "all clear" code of 11 - 11. I was asking about spark when it spits and sputters.

Burnout400m has several good bits of info in their post. How old are the plugs/wires/cap/rotor and filters? Start with the basics, then work up from there.

 

had a chance 2 use a code reader and got nothing plugs wires and caps are less than a year old i have spark and have fuel pressure also just put a new msd blaster 3 coil on and same thing ?????????????

 

Did you put the new coil on before or after the problem started? Many people have found the MSD products to be lacking in quality control these days.

Can you give us what the fuel pressure reading was with the truck in idle? Same thing with the vacuum hose removed from the fuel pressure regulator? Since the problem seems to be related to driving under load you need to see if the pressure also drops. Does the truck have two tanks? Does it happen on both?

The no code problem is not helping the issue. Before condemning the PCM it would be wise to clean the diagnostic connector pins with contact cleaner. Or better yet use a small screwdriver or piece of nail file to shine them up, then try checking for codes once again.

 

Just because you have new ignition components doesn't mean they aren't bad, as I found out today when my blazer died on my and I replaced most of the 6-month old ignition components and it fired right up again.