1997 Ford 7.3 compression

8850dave · Nov 7, 2015

What should the engine compression be on my 7.3 with about 135000 miles as I checked it and found a range of 320-340 psi. But the engine seems very slow cranking over while I was running the compression check

markct · Nov 7, 2015

With compression the big thing is if it is even on all holes. Not too often anyone really checks diesel compression unless there is a reason to suspect a bad hole etc. Basically if it runs it has good compression

Janicholson · Nov 7, 2015

Slow cranking on a diesel with the injectors out might be the issue. It should spin like a dervish Jim

Aaron SEIA · Nov 8, 2015

Those numbers sound good. I think it's your starter. If you had all the glow plugs out and it spun slow, it has to be in the electrical side of starting. Batteries, starter, wiring connections.
AaronSEIA

1997 Ford 7.3 compression

8850dave

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markct

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Janicholson

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Aaron SEIA

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