I should have mentioned that it shifts just fine through all gears and into
overdrive if I don't race up to speed. This problem only happens when I
step on it and only at the higher gears. I just have to let off the gas a
bit and things return to normal.
Thanks,
Mark
werlax@hotmail.com wrote:
> When I accelerate hard and get up to the highest gears, I'm having
> throttle issues. It'll hit high gear, then shift down, shift up,
> shift down.. probably only a second between each. It causes the truck
> to surge forward/back. Could this merely be a matter of adjusting the
> TPS?
> When I ordered my ported TB from Hughes Engines they detailed
> information regarding modifying the TPS. Basically I removed the
> brass bushings so I could tweak the voltage to the sensor. I'm
> wondering if it could be causing this problem and, if so, which way I
> should tweak the setting. I have it set now in the .7 range (can't
> remember exactly) but the problem is that I've done a few other
> things since I've adjusted the setting. What else could be causing
> this?
>
> Just for reference, I'm listing the changes I've made to my truck.
> K&N intake
> Ported TB 728CFM (1.5" Hg)
> Ported cylinder heads
> 1.7 Comp Cams Roller Rockers
> JBA headers and exhaust
> TPS mod (still tweaking)
> Plenum pan repair w/ 1/4" thick aluminum plate
> Edelbrock IAS shocks
> Moog upper ball joints
> Powerslot rotors
> Hawk brake pads
> 180' thermostat
> MSD 6 ignition
> MSD 8.5mm wires
> MSD blaster coil
> Accel cap/rotor
> Autolite cold plugs
>
> Thanks for any help!
> Mark
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