I have a 95 Ford Explorer with the CHECK ENGINE kight on for the past year. I've slowly been replacing parts to resolve this problem, but had no success. I replaced the catalytic convertor, the two O2 sensors, the PFE and the DPFE. The vacuum lines are all ok. The codes have been cleared and rechecked. I'm still getting a 327 code and my help indicates low voltage to the DPFE.
The voltage to the DPFE ranges from 0.01-0.02. I can't find anywhere that tells me what the PROPER voltage is, nor can I find out what's causing the problem. ANY help is greatly appreciated.

 

I don't remember the specific answer (I want to say Vref which is approximately 4-5 V), but if you search this forum (set the time setting back so it will search last summer) for a file called "gtest.pdf", you'll find a complete EEC-IV diagnostic article, including circuit tests for a code 327 that will tell you what the voltage should be.

 

MrShorty, Thanks. I found the file and it will definitely be helpful.
Unfortunately for me, one of the tests it specifies (using a jumper wire to check the circuit) was performed about 6 months ago and fried my computer. I replaced the computer and I'm hesitating on trying it again. I'll have to try all other avenues first. Thanks again.

 

Hi.. I'm new here. I have a 1995 F250 with an intermittent 327 code. I've tried searching fo the gtest.pdf you referenced (12-22-2003) but can't find it or don't know how to search properly. Can you point me to the correct search to use ??

Thanks

 

The search feature is down while they get a new server installed. Use Google searches instead for now. That's how I found this link:

http://www.carsoft.ru/avtorepair/gtest.pdf

Good luck!

 

Got it !! Many thanks.