Halp ANHT cal

[Ward]

Your problem amy have nothing to do with the ECM, 1st check the fuel system
 The proceedure is:
1) key on
2) pressure s/b 3 bar, (3 time local baro) about 45# at sea level.
3) Pressure should hold for a very long time, loss of pressure gt 10# in 5
min is consiedered a failure. There s.b about 1/2 begining pressure 24 hr
later.


This proceedure will show:
1. a leaking injector
2. internal fuel pump leak
3. bad pump check valve.

All of this is done with the ecngine Not Running.

I you check the 160 count IAC you find that its only there for a very short
time. Its used as an anti-stall and is never less than 145 in any calib.

You may wish to check the imptoper shut dounw flag, this will give you a
clew if the ecm ever declared the engine running.

There are significant differances between cranking and the "timeout" start
up mode then actual running.

The flags are big help in establishing which of the three modes your having
the probelm with.

Ward

On Sun, 11 Jul 1999 12:27:56 -0400, David A. Cooley wrote:

> Jason and tom,
> It sounds like maybe there is an injector that is leaking... After you
shut 
> it off, it sits and drips until there is no fuel pressure left in the
rail, 
> then when you go to restart it, there is too much fuel sitting in the 
> manifold.  Cleaning/replacing the injectors may help.
> 
> 
> At 11:24 AM 7/11/99 -0400, you wrote:
> >thergen at svn.net wrote:
> > >
> > > If it helps, if my '92 v6 4.3 vortec doesn't start on the first try
> > > (typically 60F ~ 90F OAT) with the usual 1 - 2 second crank, I have
to
> > > floor it (clear flood mode) to get it to start.  This holds true
whether
> > > it's been setting for hours or it's a warm restart.
> > >
> > > Compared to my '87 cavlier (2.8, dis, maf), which is similiar to one
of
> > > the cals you've mentioned (map?), the crank was always longer, but I
very
> > > rarely had to floor it, even if it didn't catch the first crank.
> > >
> > > Tom
> >
> >I've got the same problem with my 4.2L AMC I6, 4.3 7747 TBI swap, if it
> >doesn't catch the first time I have to go to clear flood mode to get it
> >to start and when it does start it blows black smoke, I have decreased
> >the fuel during cranking by 50% and this didnt seem to help, what did
> >seem to help a little was to reduce the fuel in the VE tables at 0-400
> >rpm and 20-40 map to 0 this helped but it didnt make it perfect. I didnt
> >touch the other VE tables, so I dont know if decreasing fuel there would
> >help even more... I'll try decreasing fuel in the other VE tables and
> >report the results.
> >
> >Jason
> >--
> >88 Wrangler - 158K miles and counting
> >258 I6, 4.0 head, Cherokee header, 2.5" High-Flow Cat & Flowmaster
> >GM TBI (Soon to be MPI hopefully), Crane 260H Cam
> >TJ Fender Flares
> >http://jweir.home.att.net
> >CNC 4X4 Member - http://cnc.4x4.org/
> 
> ===========================================================
>             David Cooley N5XMT           Internet: N5XMT at bellsouth.net
>       Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
>     Sponges grow in the ocean... Wonder how deep it would be if they
didn't?!
> ===========================================================





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