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Re: DTC P3040
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>
> You put the engine at top dead center for that cylinder and hold it
> in place, then apply compressed shop air into the cylinder through the
> adapter. If you hear hissing from the tailpipe, it's the exhaust
> valve, from the intake manifold and it's the intake valve.
>[/color]
BUT if you hear it from the exhaust and the intake; it could still be the
exhaust (Leaking into the manifold and finding it's way through another
cylinders open valve.
We just did one last week had a chipped exhaust valve; the first time I got
to use my leak down tester, and I've had it for 2 years.
--
Stephen W. Hansen
ASE Certified Master Automobile Technician
ASE Automobile Advanced Engine Performance
ASE Undercar Specialist
[url]http://autorepair.about.com/cs/troubleshooting/l/bl_obd_main.htm[/url]
[url]http://www.troublecodes.net/technical/[/url]
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