Threw A Code - Now What?

June 16, 2006, 07:13:32 AM

Note - This thread started under "New EGR or Not?"
I ran the codes on my 88 5.0 Cougar and got a #34

EVP - (R) EGR did not respond properly during test
EVR - (O, R, M) EVP sensor is/was high
PFE - (O, R, M) PFE sensor is/was out of range

I replaced the EVP sensor with no change (I was hoping rather than checking:disappoin). To narrow down what's throwing the code, I know I can check/verify the EGR valve with vacuum but how do I check the EVR and PFE sensors?