93 F450 Diesel running bad

[FB71]

ok, first question; 7.3 DI or DIT? (no turbo, or turbo?)

second; do you have access to a scan tool? Not a code reader, but a real scan tool.

it could be a fuel issue (as stated), a high pressure issue, or an electronic issue.

I repaired and taught PowerStroke 7.3L DIT repair for many years at Ford. I'll be glad to try and help.

[sc72]

Sounds like it might be the lift pump.

Have a friend with a '94 F-350 Diesel. It sat for 4 years, he got it home, same sort of deal. We changed filters, worked for a bit, then the same thing.

He took it to a shop, I'll try and find out what he replaced tonight at church and get back with you.

Larry, went you get to Chuch tonight, pray for the truck, i'm not nomally a hot head but this things got me scratching my head. the truck was a working unit when i bought it, so there was no down time. hey i'm getting 10 mpg whats the average with these. Thanks

[Zanzer]

I have a 95 with a similar issue. I would be going through the gears and it would sometimes fall on it's face from one gear to another. I thought it was a fuel issue because I could press the clutch and rev it a few times and it would clear up. I changed all the filters and ran Diesel Kleen through it religiously but it still did it. Then one day it wouldn't take any fuel at all. It idled fine but when you hit the accelerator it was like it wasn't connected to anything. I think I've got mine somewhat pinpointed down to the drive by wire throttle set-up. After messing with the throttle driver a little it finally cleared up enough to get it to move again but it still acts up from time to time. I can't comment as to whether replacing the switch cleared it up because I haven't been able to locate a replacement yet. It's just something for you to consider while troubleshooting the issue.


EDIT: I'm curious to find out about the lift pump too. Thanks for the heads up Larry

[Larry Hampton]

Sounds like it might be the lift pump.

Have a friend with a '94 F-350 Diesel. It sat for 4 years, he got it home, same sort of deal. We changed filters, worked for a bit, then the same thing.

He took it to a shop, I'll try and find out what he replaced tonight at church and get back with you.

[sc72]

Hello Friends, the question i have today is about this 92 F450 rollback truck i bought 6 months back, the truck has been running fine till a week ago when i put 14gal in the 16 gal tank, drove it two blocks then it started to mis and pitch a fit, chaged fuel filters and no differance, tonight i'm going to cut the fuel filter apart and look for junk, hard to start, it will rev but really slow and only to 2000rpm. OK so any thoughts, comments or concerns. I do need this truck to run so any help would be greatful.