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Old 03-22-2005, 04:01   #1 (permalink)
milgil
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Re: 94Explorer:Fuel Pump runs runs run& cranks -no start

Update - 3/22/2005

The last thing I did in November 04 was to swap out the ECM (inside by
passenger kick panel)
I bought it off E-Bay - big risk. but it worked & did the same as my
original, for about a week. Fuel pump runs, runs, engine cranks,
finally pump shuts off(pressurized)engine starts. F....!!1!..
Same shit different ECM. could I have 2 identically bad ones? Same
scanner codes also!
about a week later this FP run / no start problem went away.
Its now Feb. 05 & no problems with that.
CEL still comes on after a short time. 1min - 5min. & poor throttle
response from idle(smooth) to around 2000rpm. Not noticeable when on
the road.
It passed emmision test last week( weeew!)

So its one of "those" problems. The only thing I did was to run a few
cans of sea-foam injector cleaner in gas last Oct 04. Hmmmmmmm
I've never had much faith in cleaner additives correcting an injector
problem.
But I could see using it as preventive maintance regularly during the
year. I never did that.
Ok that's that for now. Time will tell

94 Explorer limited (yes very limited)
4L v6 4WD 160K (bought new in 95)
Have used Amzoil 2X / year its intire life. No oil leaks/no oil
burning.
I think that says somthing.

Thanks again to all out in usnet land!

Gil


Jim Warman wrote:
> Scanning through the PC/ED, 538 wants to be sure that the rpm did go

past
> 2000 during the dynamic response test - if it did, they are

indicating a bad
> PCM as the likely cause ( I always hesitate to suggest the module as

the
> culprit because it is to easy to shortcut a pin point test and all

roads
> lead - eventually - to replacing the module). 412 indicates that the

PCM
> can't control rpm to it's satisfaction.... any things can influence

this
> including having someone monkey with the base idle screw....
>
>
> "Gil" <milgil@cin.net> wrote in message
> news:bc614b1.0411220256.211a3bc0@posting.google.com...
> > milgil@cin.net (Gil) wrote in message
> > news:<bc614b1.0411210314.3d420fc@posting.google.com>...
> >> "Jim Warman" <mechanic@telusplanet.net> wrote in message
> >> news:<Fjznd.194202$9b.128910@edtnps84>...
> >> > The PCM controls the injectors. The ICM controls spark at the

behest of
> >> > the
> >> > PCM. The ICM also provides rpm signal to the PCM.
> >> >
> >> > What test are you using to prove that the PCM isn't pulsing the
> >> > injectors?
> >> >
> >> > Rather than giving some aftermarket code description, I am

better
> >> > served
> >> > with the exact code retrieved. This way I can refer to the

factoy
> >> > service
> >> > manuals.
> >> >
> >> Here are the last set of codes I got from my Actron code scanner:
> >>
> >> 327
> >> 332
> >> 327
> >> 332
> >> ----
> >> 327
> >> 332
> >> 327
> >> 332
> >> ----
> >> 332
> >> 538
> >> 536
> >> 332
> >> ----
> >> 538
> >> 536
> >>
> >> All this is telling me that the EGR valve is not functioning or

its
> >> not getting detected funciotning- but is it? I tryed unpluging &
> >> capped the vacuum line to it, did not make any differece running

or
> >> driving. Its hooked back properly now.
> >>
> >> the 538 536 tell me I cant get it to do the second part of the

KOER
> >> test.?
> >>
> >> Make any sense for the problem at hand?

> >
> > I hooked up the scanner again last night & got these codes:
> > 11/19/04
> >
> > 412
> > 326
> > 538
> > 412
> > 326
> > 538
> > (these same codes sent again)
> >
> > It does not seem I'm getting the dynamic response test required by

doing a
> > WOT?
> > What am I doing wrong? I see the engine code flash, the single

light
> > blips, I turn the steering wheel, stomp on the brake, & then floor

the
> > bitch!
> > codes 412&538 = insufficent rpm change during DRT
> > I'm at a loose.
> >
> > Thanks
> > Gil
> >
> >
> >
> >
> >
> >>
> >>
> >> > "Gil" <milgil@cin.net> wrote in message
> >> > news:bc614b1.0411191522.2f2da085@posting.google.com...
> >> > > "Jim Warman" <mechanic@telusplanet.net> wrote in message
> >> > > news:<QRbnd.277$y72.229@clgrps12>...
> >> > >> Well..... you keep saying that the CEL has come on when the

problem
> >> > >> occurs..... is there some reason you arren't aving the

code(s) read?
> >> > >> This
> >> > >> is
> >> > >> offering what could be a very important clue to solving your
> >> > >> problem. I
> >> > >> would think (at the very least) that you would have a memory

code
> >> > >> stored
> >> > >> in
> >> > >> the PCM.
> >> > >>
> >> > >> The module you are referring to, behind the right side

headlight,
> >> > >> would
> >> > >> be
> >> > >> the ignition control module..... not the PCM.
> >> > >
> >> > > Which one ICM or PCM gives the injectors a pulse when turning

on the
> >> > > key?
> >> > > Is that the culprit not releasing that pulse until I cycle the

key
> >> > > on-off a bunch of times?
> >> > > I will try again to get the codes this weekend. Maybe between

my son
> >> > > &
> >> > > I we can get it to go into the second part of KOER test.
> >> > > All I come up with in the first part is "insufficant EGR
> >> > > voltage/opening"
> >> > > That anit it.
> >> > >
> >> > > Thanks again.


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