I am looking into buying a '94 f450 with a 7.3l with a factory turbo, but its not the powerstroke. The truck has been sitting a while and smokes extremely bad when you step on the pedal. (black smoke) But it will sit and idle pretty nicely. Would that be bad injectors? I also noticed blow-by coming out of the dipstick hole, is that normal? The truck only has 105,000 miles think its worth getting involved with?

 

countryboybct,
Welcome to FTE and the IDI diesel forum.


Black smoke is probably to much fuel for the amount of air in the cylinders.

First check, how is the air filter.

Possible that a previous owner turned the fuel up or jacked the timing up trying for more power.

 

Also check the impeller shaft of the turbo for damage and play. Is this sitting still or while driving?

 

if its been sitting the smoke is probably normal from being unused.but they are good trucks and easier and cheaper to work on.

 

It smokes while its just sitting parked. It doesnt have enough power when you step on the pedal to drive anywhere except around the lot its parked in. When i say smokes I mean billows of black smoke to the point where you cant see in front of you.

 

thats starting to sound like the turbo might be stuck,

 

We got a 93 IDI and a 94 without the motor but an excellent body for about 500 bucks from a neighbor a couple months ago. The 93 had the same problem. Smoking terribly, no power and really hard to start.

All it was was a giant rat nest in the air cleaner restricting the air flow and the return line caps on the injectors were leaking pretty bad. After cleaning it up, changing the fuel and oil in it and fixing the leaks it now runs like a brand new truck. It's got almost 400,000 really hard miles on it too. He pulled a flatbed with a big case backhoe on it since buying it new.
Oh, the owner thought the transmission was fried too. It's got the E4OD. It shifted gears at really high RPM's. All that was was the pigtail connecting to the VSS was chewed off by a rat. 10 bucks later the transmission runs like a champ. It's never been overhauled either. I am kinda shocked it stood up to that heavy a trailer let alone lasting 400,000 miles. That's almost unheard of even running empty.

It usually is something really stupid on these trucks you find just sitting somewhere.

Another friend of mine just got an old tracked farm tractor off of EBAY and I'm getting it from him. He got it literally dirt cheap since they didn't put a reserve on it. The ebay ad said it had a broken crank. They left out the word hand. The hand crank on the front of the engine was broken off and missing! Noone else bid on it thinking the engine crankshaft was broken. It's NOT. I love these good deals. They don't happen often enough.

 

it defintly has to have something restricting air to it.

 

the turbo not spooling wouldn't efect it sitting still. deffinatly check the air cleaner.

 

bein it sat for a while a rat could have a nest,and the turbo could be seized up from sitting and not getting lubricated

 

I third or fourth what people have said here, check the airbox!

When I pulled mine off there was a bunch of insulation and other crap up under the filter. Not enough to block it, but something had definitly been in there.