Cylinder 8 failed contrib test, but buzz test passed... - Ford Powerstroke Diesel Forum
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Old 07-28-2008, 05:28 AM
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Cylinder 8 failed contrib test, but buzz test passed...

2002 7.3L, 4x4, 260xxx miles. AFAIK, the injectors are still origional. I ran the buzz and contrib. tests with Autoenginuity. On the buzz test everything sounds consistant, all eight injectors buzzed. I'm not getting any smoke on startup, engine seems to be running fine. However on the contrib test 8 came up with a P0284.

My question is what are the next steps to examine what is happening with cyl. #8? On the PERDELS live data cyl. eight is showing 3.8-4.5. Could any damage be caused by driving it? There are two other error codes: B1203 fuel sender circuit short and P0500 vehicle speed idle control and aux inputs.

I'm planning on changing filters/oil/tranny fluid, etc this weekend. Any thoughts/tips?
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Old 07-28-2008, 05:49 AM
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run a compression test on left(drivers side ,no. 8 is the rear one) bank, if compression passes needs an injector , fuel pump code means pump may be getting ready to take a dump , p0500 is usually rear speed sensor
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Old 07-28-2008, 07:53 AM
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Thanks scuffy. Will any damage occur to the cylinder if I drive it as is?
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Old 07-28-2008, 07:55 AM
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no not really , if it is base engine the damage has already been done, like rings worn or whatever , valve problem, and even then , its just gonna skip
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Old 07-29-2008, 12:59 AM
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injectors

Thanks for the reply. If all the injectors are passing the buzz test, why could there still be a problem with one of them? (I don't mean this to sound aggressive, I just don't know enough about the subject).

Thanks...
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