Quote:
Originally posted by irseg
Peryn and badflsh got it right, you're looking for a pipe going from one of the exhaust manifolds, to what looks like a little flying saucer (that's the EGR valve), and that attaches to the intake. It may have either a vacuum line or an electric actuator on it, I'm not sure which the 4.6 used. If it has the electric actuator/position sensor, those died fairly often. Either a clogged/broken valve or a bad actuator would set an EGR code.
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Truth here. Diagnostic codes only point to the vehicle system that is sending the computer data that is out of the normal range.
The problem could be the EVP sensor, a vacuum leak, carbon in the valve or a bad diaphragm.
Don't spend any money until you're sure you will be solving the problem.