Question about 1994 Ford F350 Crew Cab

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I have a 94 f350 dually with 7.3l turbo diesel that is burning about 4 quarts of oil a day and I cant figure out the problem. Not much oil leaking out of bottom of engine, but a little. Thinking either rear seal is bad, or the seals for the injectors are out, but would that cause it to burn 4 quarts or more a day?

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  • Mike May 11, 2010

    how many miles on this unit? Were oil changes performed routinely?

  • radd69 May 11, 2010

    no the injectors would not leak oil because of a sealing ring, is there excessive tailpipe smoke? look in the valley and see if there is excessive oil there.

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: oil leak on top of engine behind turbo

MY 2001 7.3 was leaking the same way. The dealer said the o'rings under the pedestal were leaking. I had the dealer replace the o'rings. By the time I got home, it was leaking again. Called the service department and told the manager,and they put on a new pedestal and o'rings. They only charged me half price for the pedestal and no labor. That did stop the leaks.

Posted on Oct 09, 2008

  • 1 Answer

SOURCE: 97 F350 diesel check engine light stays on and is running rough?

Ok, lets take this from the top. I have a 97 f250 diesel. In mid may mine did the same thing. It's either one of two things. You have under valve cover harnesses (uvc). They slide in under your valve covers, you will see two wiring harnesses on the outside of the valve cover gaskets on either side of the block. Ok, it IS possible one of these slipped out of place and killed two of your injectors, causing the horrible running/ low idle/no power/ sounds like the truck is going to stall symptoms. The easiest way to check that is to unplug the wires while the truck is running and see if it kills the engine, if it doesen't unplug the other one on the same side of the valve cover. If both of these don't cause any change then you have a bigger problem, the IDM (Injector drive module).

FAIR WARNING: When you unplug the wires with the truck on it is extremely dangerous, it is 110 volt feed. It can kill you.

OK, the IDM is a silver box, 8"x10" approx dimensions, located on the driver side under the hood, over top the front tire. If you take the wires you unplugged and take a multi meter to them and they are dead, you have a bad IDM. This was the case with my truck. Ford designed the IDM to have a hole in the side to allow condensation to escape from it, unfortunately, this allows water inside and will short out resistors and practically kill half of your engine. Buy a new IDM on ebay for about $380. It takes 5 minuts to put it in.

I hope this helps you out man.

Posted on Sep 11, 2009

  • 524 Answers

SOURCE: 2005 single axle F-350

Yes you will need to pull the axle to get that seal out. You will need to pull tire open punkin or gear case there will be a C clip holding the axle inplace pull this out and very carefully slide the axle out the seal is in the axle housing

Posted on Apr 08, 2010

  • 1374 Answers

SOURCE: 94 f350 7.3l turbo diesel looses oil pressure as rpm increase

Before you spend money on a new gauge. Get an oil pressure testing gauge for $20 , remove the oil pressure sending unit and test the oil pressure. If oil pressure at idle and 3000 rpm's is a-ok via spec's ( big money repair items) then its either the gauge a clogged or defective sending unit or the circuitry. (little money repair items)
You can also have this done at a repair shop.

Posted on Apr 26, 2010

  • 181 Answers

SOURCE: Hear a popping noise when braking. Could this be

This vehicle does not have king pins. There are a lot of front end parts that go bad. Ball joints, stab links, sway bar bushings. Best bet would be to have a proffesional take a listen to it.

Posted on May 07, 2010

Testimonial: "Took to Ford dealership and they are the ones who told us king pins needs replacing. Guess we need to call them tomorrow - gave us an estimate of $1,000. Maybe need to find new dealership! HA!"

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1 Answer

I have a 94 f350 turbo diesel. and it has big oil leak on the back of the engine. i just replaced the rear main. and only leaks wen running.wat could it be.


If you have replaced the rear main bearing,You may have damaged the rear crankshaft seal.Check to see if its comming from where the engine meets the gearbox.

Jun 15, 2011 | 1994 Ford F350 Crew Cab

1 Answer

Leaks gear 90 oil by the throw out bearing on my 1999 ford f350 2 wheel drive dually diesel


The only gear oil near the throw-out bearing would be in the transmission and the only way to the throw-out bearing is out the transmission front bearing retainer. I would check the vent first. It's on the transmission top. If that's free you'll have to remove the transmission and front bearing retainer to check the front bearing and seal.

May 07, 2011 | 1999 Ford F350 Regular Cab

1 Answer

Hear a popping noise when braking. Could this be


This vehicle does not have king pins. There are a lot of front end parts that go bad. Ball joints, stab links, sway bar bushings. Best bet would be to have a proffesional take a listen to it.

May 07, 2010 | 2004 Ford F350

1 Answer

Burning oil up to 4 quarts some days and none on other days. checked for leaks and found none. Checked tubo it is clean. check air filter also clean


Sounds like leaking O-ring seals on the fuel injectors, high pressure oil leaking into the fuel rail. Have/do all 8 injectors.

Oct 24, 2009 | 1994 Ford F350 Crew Cab

1 Answer

1996 F-250 powerstroke the truck only has 150000 miless on it ans with no visible oil leaks but it uses oil or leaks it. its not bad around town but when i went on a 700 mile trip it used about 3 quarts of...


unfortunatly its probably an internal leak and the motor is burning the oil.this could br caused by leaking valve seals,bad rings or more likely bad turbo seals.add some lucas oil conditioner and see if that helps.to check the turbo pull the tube going from it to the inter cooler and look for oil. due the same on the exhaust side

Sep 14, 2009 | 1996 Ford F350 Crew Cab

2 Answers

Diesel wont start


1. Make sure that the battery is fully charged.

2. Check the fuse for fuse # 30. This is the fuse for the:
Fuel Heater (Diesel only),
Wastegate Solenoid (Diesel only)
Injector Driver Module Relay Coil (Diesel only)

3. It is not uncommon for the fuel bowl heater (little wire in the bottom of the fuel bowl) to go bad. If the fuse is burnt, you can pull the small plug on the back of the fuel bowl to get around a bad fuel bowl heater.
As far as fuel leaking, a common problem is the water separator valve behind the fuel bowl. There are o-rings in there that tend to go, especially now that we're burning the ulsd. Do a search on water separator, and you'll find volumes of information and how-to's to swap out the o-rings.There's other reasons that you could have a fuel leak, but that is where I would start first. And welcome to The Diesel Stop.

Hope these helps and have a great day!

Aug 07, 2009 | 1999 Ford F350 Regular Cab

1 Answer

Smoke from exhaust when decelerating on Ford F-350 Powerstroke


Either valve stem seals are leaking or the turbo oil seal is leaking.

Apr 29, 2009 | 2001 Ford F350 Super Duty SuperCab

1 Answer

I have an issue with my 94 ford 350 diesel. A major oil leak


hello if it leaks in alot of places you may want to check your pvc valve

Feb 16, 2009 | 1994 Ford F350 Crew Cab

1 Answer

Oil Leak under the turbo on top of the valley baffle


ok ive experienced this same problem, my dad has the same year truck as u.first year powerstroke, you have to remove the turbo, there will be one bolt in the turbo stand, u will need a 10mm universal joint for a 1/4 inch drive ratchet, to remove it, but under the turbo stang there will be 2 O rings, replace those and u will be set to go.

Jan 11, 2009 | 1994 Ford F350 Crew Cab

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