i recently aquired this 69mm tb from a freind and the tps plug was broke off, so i put my tps on it, now my car for some reason wont idle down past 1300 and it does the rev up and down game now, i turned the fast idle screw all the way down with no changes, my question is this, how do i set the tps back to its proper place, i put it right in the middle of the sliders so that if i needed to adjust id be able to go both ways. which way to i need to slide it? im just tryin to get an idea because i have to pull the t/b off to loosin the screws to turn it, so i wanna do it right the first time

 

could be a vaccum leak, spray carb cleaner around the TB area to see. i had the same prob;em

 

Check that the throttle plate in the new TB is sealing properly. To set the TPS properly, you need a multimeter to measure the potential (voltage). It should be 0.5V when closed and 4.5+ V at WOT.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">Check that the throttle plate in the new TB is sealing properly. To set the TPS properly, you need a multimeter to measure the potential (voltage). It should be 0.5V when closed and 4.5+ V at WOT.</TD></TR></TABLE> Dogginator's got it, calibrate it to the correct voltage and no more problem.

 

k, i calibrated it, and rechecked all my vaccume lines and still cant get it down past 1300, what else could it be? i wasted almost a whole can of carb cleaner checking for leaks

 

Check to make sure that the throttle plate is fully closing. There should be an adjustment screw.

 

Replacing my TB was the biggest headache ever...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">Check to make sure that the throttle plate is fully closing. There should be an adjustment screw.</TD></TR></TABLE>|

That was one of my main problems, check that. best of luck to you buddy

 

i give up!! im selling the car, ive NEVER had this much problem with a car til i bought a honda

 

Post a picture of the throttle plate. I'm curious as to whether is was machined properly.

Here is an easy test, remove the intake, start the car, and block the passages in the TB before the throttle plate with your fingers. Does the car still idle?

 

noo but now ive lost spark, im running all msd crap and my ignitor burned out now,, im jynxed

 

msd is crap sometimes, but try the throttle linkage mabe it's too tight it might give a high idle.

 

its not even connected yet, so its not that