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Re: Off topic F150 question
Jim,
I bought a aftermarket DPFE (AutoZone, the black plastic one) about
6mo./15K miles ago. I might still have the old one in the garage, maybe. If
so I will try to put it back on since it was not the problem the first time
to see if the code will stay off.. The throttle body is still clean from
6mo ago.
If you do not mind and have the time I would appreciate the test
procedure.
Thank you for the reply
Richard Grimes
"Jim Warman" <mechanic@telusplanet.net> wrote in message
news:RLNFf.263902$OU5.238212@clgrps13...
> The DPFE sensor is the weakest link in the chain, but you should expect a
> much longer service life than you seem to be getting. Have you been using
> aftermarket or OEM parts? You can test the DPFE with a vacuum pump and a
> DMM.... let me know if you want the procedure...
>
>
> "Cedartown Electronics" <rgrimes@tds.net> wrote in message
> news:d420$43e771d3$943fa388$18290@STARBAND.NET...
> > I know this is off explorer topics, but any help would be appreciated,
> > it's about to get the best of me! Thanks for all of the help on both of
> > my
> > explorers , and my nephews also.
> >
> > 2001 SuperCrew F150 V8 4.6L
> > 140K miles (highway)
> >
> > Problem: P0401 code (insufficient EGR flow) *Main problem!*
> > Light blue smoke on startup (started 137K) probably valve
> > seals.
> > Uses a little oil now. About 1qt in last 3K miles.
> >
> > History: 100K Replaced spark plugs
> > 125K (had P0401 code). Replaced DPFE and EGR valve (EGR
> > valve was still good). Cleaned EGR pipe. Cleaned Throttle
> > body
> > which was completely clogged on the EGR ports.
> > Reset code and it worked fine until now!
> > 137K IAC valve went crazy and was replaced
> > 140K P0401 code came back!
> >
> > Does anyone have any idea what I should try next to remove the P0401
> > (insufficient EGR flow) code? I checked the following things this
> > weekend:
> >
> > 1. All hoses seem fine and have vacuum.
> > 2. DPFE hoses are clean and both have air flow.
> > 3. EGR valve will hold vacuum and the engine runs rough when it is
> > engaged
> > with vacuum at idle. (I think that is one of the tests)
> > 4. The hose to the EGR has pulse vacuum at idle and the EGR solenoid
> > valve
> > has vacuum to it also.
> > 5. I removed/inspected the throttle body again anyway and it appeared
> > "clean", no ports clogged.
> > 6. Reinstalled everything and code came back after about 75miles.
> >
> >
> >
> > What am I overlooking or have not tried? Any help would be
appreciated!
> >
> > Thank you in advance for your help.
> >
> >
> >
> > Richard Grimes
> >
> >
> > --
> > Cedartown Electronics
> > ®RadioShack Dealer 22-A724
> > 1572 North Main St
> > Cedartown, GA 30125
> > (770) 749-0904
> >
> >
>
>
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