> -----Original Message-----
> Lately I have noticed that my 95 5.2 will run lean (as per a/f guage) all
> the way through 1st gear and halfway through 2nd then when it switches to
> rich the damn truck takes off like a rocket!!! Why or what is
> causing it not
> to go full rich at 80 to 100% throttle?
>
> Mods are: 180 stat, mp performance computer,dynomax cat back with no cat,
> msd superconductors, 3923's, fms 19lb injectors, 14x4 kn air filter, borg
> warner cap and rotor.
>
> Thanks for any help....
> Jason Bates
> kc8lbn@attbi.com
Jason, my '92 was running lean at the track but always went rich on the
street when floored from a roll. I changed the O2 sensor and MAP sensor to
cure the problem. Don't know for sure which sensor was the culprit.
Another thought....has it ever worked properly since you've been using the
14x4 K&N? If not, it's possible the underhood heat causes it to be lean
until you get up enough speed to have cooler air moving through the engine
compartment. The AIT sensor might also have something to do with this.
Try relocating to a cooler area to test.
FWIW...I've tried a 14x3 K&N at the track and it's always slowed me down by
a tenth of a second and one MPH. Nothing has worked as well as the stock
air cleaner with the hose to the radiator support, although I added a second
inlet to mine. (small improvement over single hose). The lack of cool air
to the open element K&N really saps the power.
RayB
http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
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