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I pposted this in another forum and didn't get any replies so I'm hoping someone here might be able to give some direction.
I have a 1990 E250 with a 4.9L six. I have two codes stored evp/egr low voltage and air management sytem 2 failure.
Would it be most likely to be an output sensor problem, (not supplying good info to the pcm)?
It's an intermittent fault, the light goes out occasionally.