Dpfe
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Freshman User
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From: Canada
Dpfe
I have been encouraged to add my post to this section as well. I am having a problem with a 4.2 E 150. It bucks and jerks around 80km and if it is floored it goes away. I am leaning towards the DPFE. However at the cost of $200.00 I want to make sure that is the problem. I am able to scan for codes and there are none present? It has that certain feeling of a misfire. I have disconnected the EGR with no change. The voltage at the DPFE is 1.06 plugged in and the same unplugged? I do not understand the NO codes. There is a definite problem. Has anyone had a same situation? Is there a way to test these as I've heard there is not. Thanks for your help,
Dave
Dave
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Joined: Jan 2002
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From: suburban atlanta
You might check the EGR ports in the intake for blockage. They may make the front half lean and the back rich or opposite... as in one plugged, the other open and the ECM knows not.
The 4.0 DPFE is a known failure item, but haven't heard of the 4.2 (300 6, right?) going bad too much. Check the plug wires. I'd check that the DPFE produces a Hz signal rather than volts...
When you floor it, you are making the ECM enrichen the mixture... you are getting 'lean surge' or misfire just on the ragged edge of being too lean.. IMHO
tom
The 4.0 DPFE is a known failure item, but haven't heard of the 4.2 (300 6, right?) going bad too much. Check the plug wires. I'd check that the DPFE produces a Hz signal rather than volts...
When you floor it, you are making the ECM enrichen the mixture... you are getting 'lean surge' or misfire just on the ragged edge of being too lean.. IMHO
tom
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From: Still under the hood in O
Check/replace
plugs/wires/cap/rotor/fuel filter
check the fuel pressure
These are items that will not throw a code.
Also check or replace the 02 sensor, but this usually throws a code.
plugs/wires/cap/rotor/fuel filter
check the fuel pressure
These are items that will not throw a code.
Also check or replace the 02 sensor, but this usually throws a code.
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From: Canada
Thanks for your input TOM, As I recall this happened after I did an Emission service through the power booster. I am confused as to why no codes are set? Would you be able to shed some light on that?
Thanks, Dave
Thanks, Dave
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little_mule
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