still surges after TPS cleaning, what next?
 

well on my 97, i have been experiencing some surging issues going down the interstate the last couple weeks

doing 75mph on a flat chunk of road, no wind, i will be pushing 5psi of boost steady. about once or twice a minute, you can feel the truck surge and you can see the boost go up to 7 or 8psi

so tonight after doing some reading, i pulled my TPS off and drilled a small hole in it.

- still not sure if i drilled it in the right spot.... it was on the completely flat side, one third of the way in from the right side, and about half-3/4 of an inch from the bottom. i felt the drill "punch through" so i sprayed some electric cleaner in the hole and let it run out, did that a few times. let it dry up for an hour, then i dabbed a bit of RTV over the hole to seal it and reinstalled it-

anyway, i took it back out for a test drive, and it still is doing it. what should i look at next, throttle cable?? i havent noticed any frayed cable or anything of that nature so i wasnt positive on doing that. i have also heard of guys taking the wires out of the harness for their TPS and placing them in their own loom, but i just would hate to do all that dang harness diving for nothing.
any thoughts on this would be much appreciated

-Josh

Why are you thinking the TPS is the trouble? Who told you that?

TPS trouble usually shows up around 50 mph. Your converter will lock and unlock. I also had a bit of a hickup, like running out of fuel, at 30 mph or so. Did you happen to check the TPS voltage for a smooth increase throughout it's travel?

I don't know what to say about your problem. If you're noticing a boost increase, there's some reason why an extra load is being put on the engine.

i thought it might be the TPS just from reading up on here and listening to other people talk about what it could possibly be

i have heard anything from it being a lock up solenoid, to my TPS, to the throttle cable. i am just kind of fishing around trying to figure out what the heck the deal is with this pig

-Josh

Sounds like a TPS problem to me.
Sometimes cleaning won't do it and a new one is in order.
You could try installing a mystery switch permanent or temporary to isolate the problem.
Instructions> http://www.tstproducts.com/Torque%20...p%20Switch.pdf