the str tb i got did not come with a tps on it, so i took the one off my stock b16 tb and used it. i set it properly but the idle would not stay high enough unless the idle adjust screw was turned up so the multimeter read .55v on the signal wire. i've recently experienced some bouging issues when i idle, mainly when the car is fully warmed up, and also some white smoke coming out the tail pipe (no its NOT a blown head gasket). i pulled the plugs today and noticed some oil on the threads of the plugs, not the tip, only the threads so im thinking the gromets under the valve cover are bad, but im wondering if that would cause the condition im describing.

also i wanted to know if haveing the tps a .55v at idle is bad. when i take the idle speed screw out it reads .50v so i think thats calibrated properly but ive heard it should also be at .45v and i just want to make sure.
thanks

 

bump

 

i know someone knows what to do

 

There should be two screws and the one that affects TPS output is NOT the one to be messing with - do you not have two screws?

The idle air bypass screw is used to set the base idle speed.

 

well the idle bypass screw is on the side and faces the firewall, i generally see no difference in the idle speed when i adjust it. the idle screw is the one that adjust how far the throttle plate is opened by stopping the rotor, when i adjust this it is the only way my idle ever changes

 

Then you got bigger problems or are doing something incorrectly. Try and reset the TPS to .45v (which we'll hope puts the throttle butterfly in a position that does not allow additional air around IT).

Are you unplugging the IACV when trying to set the idle?

Maybe its different with STR t-bodies....but with stock units, the throttle plate stop screw should never be touched.

Its adjusted to a) not allow additional air around it and b) adjusted so that when you let off the gas, its not allowed to fully seat in the bore. If it was allowed to do this, it would eventually round out the bore which would give you a vacuum leak you'll never be able to fix.