95 PSD loss of power and slight miss..

[RowdyOutfitters]

My 95 PSD has lost power, fuel mileage, and seems to have a slight miss. Passes all tests though, but something isn't right. It has 220K. Running a 5 Speed Manual with a LuK Single Mass flywheel. With a trailer on the back with about 8k lbs, she won't go anywhere but backwards in Overdrive. No power at all and she struggles to get to 70MPH in 4th. Not sure what to do. All the mechanics I have taken it to are stumped. Anyone ever had this problem or know of it happening to anyone else. All help is greatly appreciated.

Thanks.....

Joe

[SMKSTAX]

Here's a bump for ya.

[gbear]

Originally Posted by RowdyOutfitters

My 95 PSD has lost power, fuel mileage, and seems to have a slight miss. Passes all tests though, but something isn't right. It has 220K. Running a 5 Speed Manual with a LuK Single Mass flywheel. With a trailer on the back with about 8k lbs, she won't go anywhere but backwards in Overdrive. No power at all and she struggles to get to 70MPH in 4th. Not sure what to do. All the mechanics I have taken it to are stumped. Anyone ever had this problem or know of it happening to anyone else. All help is greatly appreciated.

Thanks.....

Joe

Could you be more specific about what tests it passes and what the mechanics have checked?

Jim

[RowdyOutfitters]

I took it to a Diesel Injection Service's place and they hooked the scanner to it and check all the pressures, buzzed the injectors, and did the Cylinder Contribution test. It all passed. They said that it could be a number of things causing my problem, but unfortunately they didn't pull anything up. A buddy of mine worked for Ford for years and has a friend that is the diesel mechanic for Ford and he told me that I should have him look at it. It is worth a try. Just wish I know what was causing it. I am definitely taking any advice I can get. Thanks...

[Diesel Monkey]

Engine wiring harness been checked? Have you wiggled the harness when it is running?

[RowdyOutfitters]

Originally Posted by Diesel Monkey

Engine wiring harness been checked? Have you wiggled the harness when it is running?

The connectors going into the valve covers, yes. No change there. I am going to change the glowplugs, gaskets and harnesses under the valve covers here as soon as I can.

[dzlpwrd]

does your truck have a filter in the tank? if it does the filter may be clogged and need to be cleaned

[RowdyOutfitters]

I have dual tanks, and doesn't matter which Tank I am running on. I will check into that though. Thanks.

[grmckee]

I have an 02 7.3 F-350 dualy that started missing, took it to Ford truck dealer that said the wires under the valve cover on one side was bad. They changed the wires on both sides & now it runs Great. The part that hurt my feelings was the $630.00 bill but it runs better than it has in a while.
New to the site & learning how to use this GREAT place for info.

[MarlandS]

Originally Posted by RowdyOutfitters

My 95 PSD has lost power, fuel mileage, and seems to have a slight miss. Passes all tests though, but something isn't right. It has 220K. Running a 5 Speed Manual with a LuK Single Mass flywheel. With a trailer on the back with about 8k lbs, she won't go anywhere but backwards in Overdrive. No power at all and she struggles to get to 70MPH in 4th. Not sure what to do. All the mechanics I have taken it to are stumped. Anyone ever had this problem or know of it happening to anyone else. All help is greatly appreciated.

Thanks.....

Joe

My 95 F350 manual has (had) nearly the same symptoms except for the miss I never have been able to hear one in anything with more than 6 cyls so I don't know. That said, I did a cat delete today and it seems to have helped but I haven't pulled my 6K trailer yet.