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Discussion Starter #1
Well my friend, code P1407 has returned, even after cleaning the passages in the TB, and replaced the rubber T fitting that had a hole in it. Looks like I'm going to be replacing the EGR valve soon. Where is the best place to snag one? Not trying to break the bank, but giving it's location, I don't want to risk getting some POS replacement in there just to have it crap out again in 2 days.

Jay
 

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Did you replace the DPFE sensor... it is the silver sensor tucked behind the engine near the firewall. It measure how much the egr valve opens/closes or needs to. The computer gets its info from this to open more of less via the EGRV. Ive seen the DPFE sensor go out more than the EGR bc it corrodes under the rubber hoses that connect it to the EGR tube. if you pull vacuum on the EGR and car runs rough or quits then the EGR is operating and most probably DPFE not reading that it is opening causing the code.
 

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i agree with itt-bird being the dpfe sensor. but if that sensor is good and you still need the egr let me know. have one brand new for 50 bucks shipped to your door.
 

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Discussion Starter #4
Ok, I'll pull vac on the EGR and see what I get. Probably won't have a chance until tomorrow night late. If I need the EGR, I'll PM you Casper. I have some $$ in my PayPal account still that would cover it, and shipping. I'll update as soon as I get a def. answer.

Jay
 

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Boom.
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I had the same code just recently, replaced the DPFE, problem solved. Call Dan Newman or Randy Stinchcomb (at Mod Depot). I got mine from Randy because Dan wasn't back up yet, it was 22 bucks.
 

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can the DPFE be bad, and NOT throw a code?

On this 95 mark VIII engine, as you might have read, I am chasing a "rough" idle condition. it is more like a slight miss.

I dont know if it is a "per cylinder" miss, or if it is a air-induction stumble.

chances are its fuel related, but if it is EGR/DPFE related, I would rather replace the DPFE(if i can get my hands back there!)
 

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Blackicelsc said:
can the DPFE be bad, and NOT throw a code?

On this 95 mark VIII engine, as you might have read, I am chasing a "rough" idle condition. it is more like a slight miss.

I dont know if it is a "per cylinder" miss, or if it is a air-induction stumble.

chances are its fuel related, but if it is EGR/DPFE related, I would rather replace the DPFE(if i can get my hands back there!)
Yes ive seen it cause idle probs w/o the code ... it probably hasnt reached tolerances but still be close causing a slight prob.if you have corrosion or even enough moisture in the plastic one it will cause probs.

We did a ton of the newer plastic ones bc moisture was causing erroneous readings.
 

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Discussion Starter #8
Ok, I disconnected the green line from the EGR and installed my own line so that I could pull vacuum on the EGR. Fired it up, and gave the line vacuum. I can hear the EGR moving, becuase as soon as I let the vac. go, the EGR shuts. The idle dropped a bit while it had vac. applied to it, but it didn't die or anything, and then would return to normal idle when vac. released. I would have to assume that the EGR is still working and not stuck or anything, so it must be that sensor. Maybe it is just on the beginning of its failure, but enough to show the CEL.

Is there an easier way to getting that sensor off the back of the elbow than removing the whole thing again?

Jay
 
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