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Wierd EGR issues...

M

MapOfTaziFoSho

Hard-core CEG'er
Joined
Aug 31, 2002
Messages
3,448
Location
The Mogadishu of the Midwest
Why is it that my car cannot ever have a straightforward problem.

So I was getting a code p0402 i.e. too much EGR flow. So I hook up my livelink and try to monitor the EGR valve and the DPFE. After some typical driving I notice that I am not getting an DPFE voltage whatsoever!

I go to the dealership and get a new DPFE. Hook it up in under 10 minutes.

Drive around datalogging and still NO voltage reading from the DPFE.

So for now I have completely turned off the EGR system and plugged it all up.

The car drives a BILLION times better. More power too :eek:

I haven't bothered to check to see if there was/is a fuse for the DPFE, but if anyone knows of there being one please hit me up. My Chilton's is MIA.
 
It's an 03 3L. I used the stock SE wiring harness with my kkt4 ECU. I retained the 99 2.5L DPFE. I have the newer 3L DPFE sitting in my garage, but I would need to splice a new connector into the harness. I have a feeling the wires are partially melted or something along those lines. I really didn't have time to look. I don't have emissions to worry about, but it still pains me to know that I am cutting corners.
 
MapOfTaziFoSho said:
It's an 03 3L. I used the stock SE wiring harness with my kkt4 ECU. I retained the 99 2.5L DPFE. I have the newer 3L DPFE sitting in my garage, but I would need to splice a new connector into the harness. I have a feeling the wires are partially melted or something along those lines. I really didn't have time to look. I don't have emissions to worry about, but it still pains me to know that I am cutting corners.
Click to expand...

The hot idle for 2.5 L DPFE is 0.2 to 1.3 V (acceptable range). The hot idle for 3L DPFE is 0.95 to 1.05 V (acceptable range). For all you know, the 2.5 L DPFE could be sending a 0.2 V signal to the ECU and the ECU is expecting something in the 0.95 to 1.05 range.

I think you need to use the 3L DPFE. And now would be a good time if you think the wires for the 2.5 L DPFE is partially melted.
 
MapOfTaziFoSho said:
Why is it that my car cannot ever have a straightforward problem.

So I was getting a code p0402 i.e. too much EGR flow. So I hook up my livelink and try to monitor the EGR valve and the DPFE. After some typical driving I notice that I am not getting an DPFE voltage whatsoever!

I go to the dealership and get a new DPFE. Hook it up in under 10 minutes.

Drive around datalogging and still NO voltage reading from the DPFE.

So for now I have completely turned off the EGR system and plugged it all up.

The car drives a BILLION times better. More power too :eek:

I haven't bothered to check to see if there was/is a fuse for the DPFE, but if anyone knows of there being one please hit me up. My Chilton's is MIA.
Click to expand...


WHOA! that's like exactly what i'm going through right now.... What 3L set up do you have? I was getting a 402 and a 401 of and on for a while, replaced the DPFE. Still have 0.0 volts reading when i'm datalogging.... Did you experience almost like a pinging in yours? Sounds like its coming from the motor, almost sounds like its coming from the intake. I don't know what it is. My car runs a little rough, haven't gone to eliminating the EGR but close...

Let me know if you find anything :)
 
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