Turbo Problems
Thread Starter
|
Freshman User
Joined: Jan 2012
Posts: 32
Likes: 0
Turbo Problems
Happy Day!
I recently purchased a 1995 F-350 with the 7.3L Diesel engine. At first when I would start the truck you could hear what I think is the back pressure relief valve rattle a little and then slap shut. I was told originally that it was the waste gate sticking then closing. After reading up on Alldata about the Garrett TP-38 I discovered that it instead had the back pressure relief valve. The truck ran fine and this did not seem to cause a problem.
I recently started the truck and I did not hear that familiar rattle and slap as before. When the truck was idling the exhaust had a loud hissing sound. When I started to drive the truck had no power. Depressing the accelerator would cause what sounded like the pressure relief valve to close for a moment, the loud hissing sound would stop then slowly the hissing sound would return and the truck had no power. depressing and holding the accelerator would make the turbo work for a short time but the hissing sound and lack of power would slowly return.
I was told by a mechanic today that my back pressure relief valve was opening and causing me to lose pressure. I was told by another mechanic that it sounded like the back pressure relief solenoid was not closing the relief valve like it should.
I would add that the truck spent several hours tonight in the shop. When we pulled the truck in it had the same hissing sound and lack of power. When we started up the truck to pull it out of the shop. We instantly heard the rattle and slap of the relief valve and the truck ran fine.
Alldata does not have a pinpoint test that covers this particular symptom. Where should I begin? The truck is undrivable when this problem happens. It doesn't have enough power to get out of its own way.
Thanks
I recently purchased a 1995 F-350 with the 7.3L Diesel engine. At first when I would start the truck you could hear what I think is the back pressure relief valve rattle a little and then slap shut. I was told originally that it was the waste gate sticking then closing. After reading up on Alldata about the Garrett TP-38 I discovered that it instead had the back pressure relief valve. The truck ran fine and this did not seem to cause a problem.
I recently started the truck and I did not hear that familiar rattle and slap as before. When the truck was idling the exhaust had a loud hissing sound. When I started to drive the truck had no power. Depressing the accelerator would cause what sounded like the pressure relief valve to close for a moment, the loud hissing sound would stop then slowly the hissing sound would return and the truck had no power. depressing and holding the accelerator would make the turbo work for a short time but the hissing sound and lack of power would slowly return.
I was told by a mechanic today that my back pressure relief valve was opening and causing me to lose pressure. I was told by another mechanic that it sounded like the back pressure relief solenoid was not closing the relief valve like it should.
I would add that the truck spent several hours tonight in the shop. When we pulled the truck in it had the same hissing sound and lack of power. When we started up the truck to pull it out of the shop. We instantly heard the rattle and slap of the relief valve and the truck ran fine.
Alldata does not have a pinpoint test that covers this particular symptom. Where should I begin? The truck is undrivable when this problem happens. It doesn't have enough power to get out of its own way.
Thanks
Post Fiend
Joined: Jan 2005
Posts: 8,402
Likes: 10
1994.5 - 1997 7.3L Power Stroke Diesel - Ford Truck Enthusiasts Forums here is a link to the page in the diesel section for your engine, probably better to post the problem there for specialist help.
Good luck.
Good luck.
Thread
Thread Starter
Forum
Replies
Last Post
F350AgInspector
1994.5 - 1997 7.3L Power Stroke Diesel
8
Dec 6, 2011 06:53 AM
