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Compression or what?
I brought a 2003 F550 6.0 to Bolivia 2 years ago with 99,000 miles on it. After about 1000 miles it died (Sept, 2007). Would start and die. It was towed home where a local shop tried to diagnose it with their scanner and could not determine the cause. The error codes were engine speed sensor and something else. I towed it to Ford and they got no errors, no current. They said to replace the computer and pcm. I towed it to another mechanic who found a loose wire and mud in the fuel system. He cleaned the tanks and lines. I bought a new fuel pump and relief valve (in the filter). He could get it running, but it would not idle or run steady at any rpm. He cleaned the injectors, but no improvement.
I finally towed it to another shop 8 months ago. He kept getting injector codes, cleaned them and had me import a set of o-rings. Finally he gave up.
A month ago I towed it to another shop. At first he had several error codes, but now says there are no error codes with his scanner or with the Snap-on he borrowed. He says the problem is there is no compression. I went over today to watch a compression test, and he didn't have the gauge. That he towed it to start it and there was no resistance in the engine when he let out the clutch. That it just turned over easily.
I sent him out to borrow a compression tester, and tomorrow we will run the compression on each cylinder and hopefully have some answer.
The question I have for the moment: Is there anything in this engine that relieves compression in any conditions? Or if there really is no compression, is it possible that the rings got stuck or something? What else?
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