[Shotimes] Running Lean in my 90!

[Carl Prochilo]

Mike,  You probably already know that is a bad thing.  I don't know what
mods you have on that car, but I've heard that the Y-pipe upgrade can
cause the lean condition, presumably due to the higher flow it supports. 
To that end, one of the LPM programming changes is specifically made to
address that problem.  The LPM programmer would use the recorded A/F curve
as input to the revised fuel curves.
-- 
Cheers,
Carl Prochilo
92 Ultra Red Crimson

On Wed, July 7, 2004 9:45 am, Mike Murphy said:
> Howdy all,
>
> Went to the dyno and found out my motor is running lean.
>
> Have a new 190 fuel pump and fuel filter.  Also have changed plugs, wires
> and MAF to no avail. Feels like my motor is lacking umph.
>
>
> My question is that for the 89/90s they have a high/low voltage switch for
> the fuel pump.  Can I bypass the switch so it will run high only?  Would
> the
> switch make the computer wacky with the 190?
>
> When I go WOT and hit my 65shot of juice my a/f goes dangerously lean at
> first but comes back down.....but not where it should be.  I'm guessing
> the
> fuel pump is in low voltage then hits the high.
>
> Thanks mucho for help.
>
> Murph
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