95 Explorer problems - replaced engine - DPFE - AIR Temp

[shamus]

Hey guys. New to the forum obviously but I'm not new to cars. I own an 03 WRX making over 300 horses to the wheels. I do all my own work but this isn't about me...
I flooded my girlfriends truck a few months back and I had the engine replaced with a rebuilt. I took the truck to her dads mechanic against my will. I was trying to make everyone happy at the time. Well the truck ran fine for a month or so then it started having some problems. It seems to start up fine and runs ok for a while but then the CEL comes on and it usually stalls. She took it to the mechanic(toolbag) that did the work and he won't fix it because he says he's not responsible. Whatever.....I'll fix the damn thing.
He did, however, write on the receipt that the DPFE sensor and the air temp sensor needed to be replaced. After researching, this seems like a job I can do with my eyes closed.
My question...should I take the mechanics word for it that these are, in fact, the problems with her car? Should we spend the $100 on these two sensors and the whole 15 minutes of my time? I was considering taking it to Autozone to get the codes scanned to make sure but it's a hike and I'd rather not have to make the trip. Do these symptoms sound like the DPFE and Air temp sensor need to be replaced? Any chance you guys could give me the codes for these two problems just in case I do get the codes scanned?
Thanks for any help in advance and I look forward to getting her truck back on the road without having to worry about her stalling out on major highways anymore

 

[ExplorerDMB]

It would be best to get the codes scanned for yourself so you know what the deal is. The DPFE is for the EGR system and can cause multiple problems. Ford is known though for carbon build up to clog up the EGR valves and keep them even stuck open or closed. I would investigate as much as possible. You said the engine was rebuilt, who did the rebuild? With used and rebuilt engines, your kind of throwing your money away. I've never seen one work like it should after it has been installed. We only mess with Jasper Remans because they aren't rebuilts (just fixed what was wrong)...they fix everything and put everything back to stock specs. Anyway, Fords DPFE sensors aren't exactly the best either. They are so close to the EGR system that they overheat and burn up. Good luck.

-Drew

 

[shamus]

Hey thanks for the reply, DMB(Dave Matthews fan?)
Yeah I know about the rebuild. Live and learn.
Today I replaced the DPFE with no luck. However on the receipt, it also said that the MAF was reading incorrect values. So with everything plugged back in and the new DPFE I decided to see how to truck idled without the MAF. It jumped up to around 900RPM and held steady as could be compared to the 4-500 it was stuttering at before. The receipt said he soldered the MAF(WTF?) and that was supposed to be the fix. Yeah right. Anyway, we have a new MAF on order and it will be here tomorrow morning. I'm hoping this does some good.
As far as reading the codes go...it's would be hard to manage that because her CEL goes on sometimes and then off others. According to her there is no Rhyme and Reason to it

Any other suggestions? I'm open to hear anything since I know nothing about this truck.

 

[IZwack]

even if the CEL goes off, isnt the code still stored in memory until its cleared (or the batt disconnected) ?

 

[shamus]

even if the CEL goes off, isnt the code still stored in memory until its cleared (or the batt disconnected) ?

Unfortunately I reset her ECU today when I changed the DPFE sensor
I was under the same impression.

 

[Glacier991]

Continuous memory codes are stored for 40 drive cycles.