I just couldn't leave the vanished P0402 along. So I took the EGR apart no leaks even after 15 mins with carb. cleaner. Checked solenoid coil resistance 33.3 ohms (Spec 26-40 ohms) and clean. All ready had done operational test with vacuum meter.
What I really wanted to check was the DPFE. Ok actually doing it by Chilton's step #3 is in error. SIG RTN not the wire you want to read, the top wire DPFE SIG + lead and ground the _ meter lead. Mine read 0.7 volts and at 8-9 in Hg. vaccum 4.56 volts. If you pressure the REF it does go to 0.175 volts. The range of the DPFE per Mitchells is .02-4.56volts. It's definitely not the most convenient place to back probe, cars would be so simple if parts layout/positioning was easy to access. Of course the car would cost most more to execute, since no one has ever done such a thing????? :rolleyes:
Oh yes, you can also read the voltage while driving using Alex's software (for those who have it) Access "Data" tab and then select "Enhanced" $22 Mode PID 114E "DPFEGR" . I did a test drive and recorded and then played it back and watched the voltage swing thru range of voltages. Since this only updates ever 7 seconds it takes time to replay thru and find.
More later good ole cloudy rainy days, don't have to mow the pasture errr yard.
Paul
Oh well good Ole "PFM" strikes again, I'm not complaining. No CEL
