[V8] ECU grounding, etc. (abridged)

Wed Oct 12 01:50:15 EDT 2005

I'm using a paper manual for 1990. The cd manual I have is 90-94. Not sure if the paper one is worth keeping around. 

ANYWAY, I replaced the maf and my car runs much better. Word to the wise: don't take the order in which the book walks thru diagnostics too literally. One of my early gut feelings was the maf sensor but in 150k miles I haven't had one go. Guess I was due. 

After swapping the maf, codes showed 4444 (the first I'd seen that w/ the 4.2). So I set the rachet on righty-tighty and put everything back together cuz I gotta test drive. That included reconnecting the O2 I'd unplugged earlier. 

Blasted down the road, goes great. Starts this sputtery running thing up -- oh, yeah, that. Pull codes, 2341 (runs extremely rich or lean, bad O2, etc). Since 4444 showed when o2 was unplugged, hopefully a new O2 will get me back there. 

Quite coincidentally a flaps is closing and had 40% off everything a few weeks ago, and I picked an o2 up along w/ a bunch of bulbs and whatnot. Just hope it's the right one. It's bosch, I think it is the ford universal 4 wire deal. 

I also picked up an O2 sensor socket while there. 3 week shelf life for random spares seems pretty good...

DC

--------------------------
David A. Coleman
BlackRock
Sent via BlackBerry Wireless

-----Original Message-----
From: v8-bounces at audifans.com <v8-bounces at audifans.com>
To: v8 at audifans.com <v8 at audifans.com>
Sent: Tue Oct 11 18:40:23 2005
Subject: Re: [V8] ECU grounding, etc. (abridged)

I am not sure what electrical manual you are using, but I have the real paper
one I bought along with the microfiche. This paper manual was newer than the one
floating around on the manual CD. Since you have a 91 5 speed, there could be
some issues.

I thought the big changes were wiring for the 5-speed, and the door lock/alarm
was a little different.

If it gets down to it, I can try to fax you pages, or even photo copy and mail.
One day I plan to get the whole manual scanned and added to the CD - but that
day seems to be getting farther and farther away...

btw, have you actually measured fuel pressure and flow?
I like to make double sure that sort of stuff is OK before tearing into wireing.

Dave

Quoting "Coleman, David" <David.Coleman at blackrock.com>:

> OK, my thing w/ the TPS is that El Manual says the output signal is used
> by the ECM to determine transmission shift points -- n/a for a
> U-Shift-It.
>
> WAIT.  STOP the JOB.   Looking at my manual on CD, the damn thing has
> different language than my hardcopy at home!  The CD version says to
> check ECU ground at 10, 14, 19, and 24.  No mention of 54.  Oh for the
> love of all that's good and holy.
>
> I guess I'll go off this version from here on out...
>
> -dc-
>
>
> > Yup, great spark on both sides.  Tell y'all what I'll do.
> > I'll swap out the TPS and the MAF tonight w/ "hoped to be
> > good" used ones.  Perhaps I'm barking up the wrong path
> > altogether, mixaphorically speaking...
> >
> > -dc-
> >
> >
> > > Refresh my memory, please.   Seems like this has been a quest
> > > for over a
> > > month now.  Anything happen just prior to your V8 running rough and
> > > sooper rich?  Good spark from both distributors /wires?  No water
> > > ingress into the TPS?  Did you swap out the MAF and/ or TPS?  You
> > > patched up that hardline hose leak to the CC valve, right?
> > >
> > > I went through a long, drawn out diagnostic for over a
> > month with the
> > > urq a few months back and missed something that I should
> > have figured
> > > out quickly because I discounted the problem part -- until I did a
> > > little bit of disassembly.
> > >
> > > My sympathies,
> > >
> > > Ingo
> > >
> > >
> > > ---
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> > >
> > >
> >
>
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