1995 F250 4x4 5.8 auto


Being that my truck is only used to occasionally it does not get the attention it should. Its had a CEL on and off for months and it spudders upon WOT. Well today I tried to pull codes and got these.

327 DPFE or EVP circuit below minimum voltage of 0.2 volts.

334 DPFE or EVP circuit above the closed limit of 0.67 volts.

So could this cause the hesitation I seeing? What is it? What should I replace?
On the old Mustangs we just blocked off the EGR and it ran fine. I could care less about passing smog, just want it running right, more snow this week and I dont want a truck not running right with a new baby in the house.

Thanks

 

That's just the evaporator system. Emissions only, shouldn't matter much. Do a full tune up and see if it runs better.

 

Congrats on the baby man

 

That's part of the EGR system. Yes, it could be the reason for your lack of power. Those things going out are pretty common on our fords.

 

Bad EGR components definitely make these run worse. It's not that it's really a needed piece mechanically, I think it's more that the EEC is designed around it being there and will not run properly otherwise.

 

Well removed cleaned the EGR and it looked good then removed the EGR position sensor and I could not get a good reading with a meter on it so replaced it, truck runs amazing. Had not been this responsive in years. Guess it was slowly crapping out.

Thanks!