94 E350 problems??? Need help!!!

[krazykoo]

hi guys, im new to the forum and i have a problem with my dad's 94 E350 super duty. well, the problem started after my brother took the the van to go tow a car from the bay area. he said that he had the van on cruise control going about 65mph up a slope during the tow (dumb of him!). then his speed started dropping from 65mph to about 45mph while still on cruise control. he then turned of the cruise control and drifted down the hill. now, the van drives sluggish and takes longer than usual to reach up to speed. it feels like the van is driving without turbo. i took off the turbo and it seemed fine without any shaft play and spins freely. i've changed out the fuel pump expecting that was the problem, but it wasn't. now, i am leaning towards the transmission being bad. hopefully someone had a similar problem??? i need help, advice, or a direction to where my problem might be. thanks in advance guys!!!

[theoldwizard]

What engine ?

[BroncoJoe19]

Pull Diagnostic Trouble Codes (DTCs) From your onboard computer.
Your engine and transmission are computer controlled.
The computer uses sensors to tell it a number of different things and it controls actuators that push or pull mechanical levers (kinda). If one or more sensors aren't working properly, the computer goes "blind" and doesn't know what to do. If the computer can "see" but one of the actuators is broken and therefore can't follow the commands of the computer; the engine won't run correctly. The computer is preprogrammed with set values for each of its sensors, and each of its actuators. It will run a self check of all systems, like the space shuttle; it will compare its set value(s) to the value(s) it recieves from its sensors, and actuators. If any sensor or acutator is out of the "normal" range the computer will generate a "code." It will generate some codes on the fly, and others will be stored while you are driving. There is a simple method to "pull codes" out of the computer for one to use for diagnostic purposes.

Earlier versions of On Board Diagnostics OBD 1983-1995 can flash the error code to the dash board and can be pulled in one's driveway without any special tools.
Later versions of On Board Diagnostics OBDII some 1995, and pretty much all 1996 and newer, require one to use a code reader or scanner tool.

Some auto parts stores will scan your engine codes for FREE, you may want to call around. Some will scan OBDII but not the older (prior to 1996) OBD systems.

SO here you go...
How to scan FORD on board Diagnostic Trouble Codes (DTCs) in your driveway
Howto Pull Codes 1983-1995 Mustang, F series Trucks, Econolines, Broncos, 302, 351 and more

[krazykoo]

thanks guys, i have a 7.3 turbo diesel motor. i have already checked it with a code reader, but nothing came up. i am leaning towards a new or rebuilt tranny. thanks again!!!

[The Thomas J.]

Sounds like a tranny prolbem to me.