Using TBI on moded 5.7

[Mike Vannorsdel]

Well the problems I'm facing now is erratic idle and poor throttle response.  I
have tried the timing at 0 and 10 with a little added power at 10 but no fixes
to the problems.  The TBI is used and I'm not sure on the condition of IAC(it
does work but I don't know how well).  The TPS reading at idle is .78v which is
high and at WOT it's 3.8v which is low.  I replaced the TPS and now have added a
hesitation, voltage is the same.  At idle the injectors seem to be giving way
too much fuel(it almost puddles on the throttle plates).  The MAP is new and
there are no vacuum leaks.  The TPS doesn't seem adjustable.  I'm not sure if
the problem is TPS, injector, or both.  The engine cruises fine.  I'm just
looking for smooth running and have faced the fact that I won't be able to get
max performance from it with the stock ecm.  I have the data on the engines best
performance level but am unfamiliar with prom programming and don't have the
equipment.

CSH-HQ wrote:

> If you really want it right, probably will take a chip (prom).
> Might get by with jacking the timing via the dist/playing with fuel
> pressure, but those are bandaids, but will tell you how far off you are, to
> a degree.
> Try reading tuning.txt, tuning.doc, and programming 101, then check back, and
> you'll then have more of an understanding of where you are/what you have to
> do.  The related material is off of the home page to FTP, and projects.
> Grumpy
>
> >No relation.  I don't have any reprogramming eqip either.  I'm aware of the
> >needed settings for timing and fuel with the changes but really have no way
> >to change the ecm.  I was just looking to see if the TBI at stock settings
> >will be a problem or not.
> >
> >CSH-HQ wrote:
> >
> >> You any relation to Kevin?.
> >> Do you have a prom burner, or related equipment?.
> >> Have you any prom burning experience?.
> >>
> >> More fuel, timing adjustments sound likely.
> >> Have you read programming 101,
> >> do you have a 1227747 ecm?.
> >> Grumpy
> >>
> >> >I have a '91 K1500 with the 5.7 TBI.  I have just rebuilt the engine and
> >> >made a few changes.  I have raised the compression to 9.5 and added a
> >> >CompCams XE250(250/260).  What, if any, changes should be made to the
> >> >timing and TBI to work well with the changes?
> >> >
> >