Turbo Failure?
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Senior User
Joined: Jul 2004
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From: ct.
Turbo Failure?
I own a '95 PSD with 187,000 mi. I took the truck out the other day and it would not do much more than idle. It had exactly the same symptoms as when the turbo failed with 1000 mi on it that Ford replaced. We scanned for codes and came back with a clogged fuel return line. It was clogged solid. Cleaned and replaced but no help to the truck at all. Removed turbo. There doesn't seem to be any bearing problem whatsoever. The only things I can see are some oil at the compressor end of turbo and a pretty good carbon build up on the turbo side? What else can be wrong with this turbo?
Thanks for any advice that can be offered!
Thanks for any advice that can be offered!
Fleet Mechanic
Joined: Oct 2003
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From: CentralEastern Utah
Sounds like the turbo is fine and you still have a fuel problem. Change the fuel filter???? and inside the canister is a small hole going the fuel pressure regulator. Check that little screen, its prone to plug off.
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From: ct.
Idle is perfect. Smokes bad on start up only, then goes away. I have not checked fuel pressure yet. It actually sounded just like the turbo because the engine will not rev up and you can not here the turbo at all. While the old turbo spins freely and has no play whatsoever, the new one I have on the bench does get a couple of more turns when spun by hand. I'm just afraid to put it on till I rule out everything else. Please let me know if anyone has any other ideas.
Thanks for all your help.
Thanks for all your help.
Fleet Mechanic
Joined: Oct 2003
Posts: 1,764
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From: CentralEastern Utah
Does it try to throttle up? or does it do nothing. If nothing the throttle position sensor could be the problem.
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From: ct.
It tries to throttle up, turbo just won't kick in. Will try without the cat hooked up today but this happened instantly so I kinda didn't think that was it. Fuel return cup on side of filter bowl was about a 1/3 full with plain old black sediment from the diesel fuel. The screen was clogged solid with black gunk also. Nothing that I thought was unusual for not cleaning it in 187,000 mi.
One thing I did notice last night. The fan on the old turbo spins by hand freely but as soon as I stop it gets about one turn and stops. While the new one gets at least a few turns extra when spun by hand. Maybe it won't get the rpm's it needs under power.
One thing I did notice last night. The fan on the old turbo spins by hand freely but as soon as I stop it gets about one turn and stops. While the new one gets at least a few turns extra when spun by hand. Maybe it won't get the rpm's it needs under power.
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Fleet Mechanic
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From: CentralEastern Utah
The turbo won't stop the motor from reving up at a stand still. The only time it builds boost is when your truck is under load. If it spins free, its fine. Your trouble is in the fuel or high pressure oil system. Check your fuel pressure. Should have 40-50 lbs at idle. Theirs a good chance with all that junk that was in your system you got a bad pump or injector/s.
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From: ct.
I just wanted to update so I could put an answer to this thread.
The truck had a clogged catalytic converter. Gutted and re-installed and ran great.
Thanks to all who offered there help and differant things to look for. It's very much appreciated.
Gregg
The truck had a clogged catalytic converter. Gutted and re-installed and ran great.
Thanks to all who offered there help and differant things to look for. It's very much appreciated.
Gregg
