Thanks for the input, I just ordered the 19# FMS injectors due to the fact that
the stock ones are shot. That will be the first place I start by replacing the
21# with the FMS 19#. Will let you know the out come. Should be able to swap
them this weekend.
In article <000301c64ce8$40438bd0$9e544b0c@Dakota>, bpracing@worldnet.att.net
("Ray Block") writes:
>
>
> > -----Original Message-----
> > From: Terrible Tom
> >
> > phatdak98@comcast.net wrote:
> > > <snip>. Here's what I got. 98 CC
> > 4x4
> > > 5.2l Hypertech power programmer, 3" cat back, Intense performance stage
> > II
> > > intake, 160 stat, and Poweraid throttle body spacer. <snip> Installed
> MSD Superconductors, Autolite
> > 3923's
> > > .040, Accel supercoil, Accel cap and rotor, Accel 21# fuel injectors and
> > > relocated IAT sensor to intake tube. <snip>
> > The
> > > problem is the truck is hard starting, even after sitting just a few
> > minutes.
> > > <snip> I'm stumped and any help would
> > be
> > > appreciated.
> > >
> > > Thanks Kevin
> > > 98 CC 4x4 Deep Amethyst
> >
> > That's an interesting set of modifications. I would suspect the
> > injectors first. Try swapping your stock injectors back in and see what
> > happens. I think 21# injectors are a little too rich for a truck with
> > only those kinds of mods. If you were running a blower or some other
> > radical stuff I would say you could use them...
> >
> > Pull the plugs and see if they are fouling. With the 160 degree thermo,
> > the colder plugs, the power programmer *and* the bigger injectors - your
> > engine is going to be sucking down gas like nobodys business - betcha
> > any money its running rich.
> >
> > <snip> Your engine probably isn't getting warm enough to cook off all
> > the fuel and you are not getting good combustion. Also a good way to
> > roast a CAT.
> > -------------------------------------------------------------
>
> Kevin, I think Tom hit the nail on the head. There are several mods you
> have that contribute to a richer mixture. I'm speaking from personal
> experience here as I've tried them all and my trusty scanner and drag strip
> time slips clearly show what works and what doesn't.
>
> 21 lb injectors = way too rich. Even "new" 19 lb Accels are too rich.
> 160 degree thermostat = richer mix.
> IAT sensor in intake tube = richer mix.
> 3923 plugs = too cold for normal driving with a rich mix.
>
> You didn't mention fuel octane but higher = slower burn.
> Even with all my mods (see dragtruk link) anything over 92 slows me down.
> HTH.
> Ray
> http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
>
>
>
> .
> .
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.
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