Originally Posted by wmburns
Disclaimer. I do not have a set of service manuals for the 95 MY. So, there is a little bit of "faith" going on here. The 2002 reference has the DPFE hot idle values as .95-1.05. So at 1.38 it is slightly out of this range.
Here's my take. DOUBLE CHECK the vacuum lines to/from the DPFE sensor. The exhaust gas is hard on rubber parts. The lines will dry up and leak. When they do, an exhaust leak is the result. More importantly, the DPFE will read incorrectly.
Next there is a LEAN code. Is this from the same bank as the EGR tube is on? Consider that an exhaust leak will cause a lean code due to excessive air entering the exhaust and making the PCM "Think" the bank is lean.
SO....is it possible there is a bad vacuum line to/from the DPFE sensor that is causing BOTH problems?
Next just to be sure, CLEAN the electrical connector to the DPFE sensor. Use electrical contact cleaner (or MAF cleaner). Lightly grease the contacts with silcone di-electric grease (the same kind used for spark plug).
Thank you for your feedback. I'll double check the lines tomorrow when I get back from my job interview but just from a visual standpoint they look like they are fine.
As for the lean code, I'm assuming that its on the passenger side of the engine as I've been having issues with a lean mixture since I've had the car, so needless to say I've had poor gas mileage since I've had it (since January 2010) I'm trying to get this problem fixed so my car isnt sucking down gas like its water. I'm also planning on seafoaming it and seeing if that will also help with gas mileage.
as for the rest of the engine, for it being a 1995 it runs great, I've had no other problems out of it other than this and my overheating problem which I do believe I have fixed.