TPS ADJUSTING?
10-18-2004, 06:03 PM
#1
2nd Gear Member
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Join Date: Oct 2004
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TPS ADJUSTING?
I RECENTLY PUT UNDERDRIVE PULLEYS ON MY 88 5.0 AND I HAD TO SET THE IDLE BETWEEN 750-800 WHICH I DID BUT I'M NOT SURE HOW TO SET MY TPS SENSOR SO MY IDLE IS A LITTLE FUNKY, ANY BODY HAVE ANY INFO?
10-18-2004, 06:06 PM
#2
I ♥ Acer
Join Date: Sep 2003
Location: United States
Posts: 8,826
RE: TPS ADJUSTING?
you gotta wallow out the mounting holes and twist it till the KOEO voltage is around .95v, forget which wire to check for the voltage though its been a while since I've looked at a 5.0, but Im sure theirs only gonna be only 1 wire with power so it shouldn't be too hard to figure out.
10-18-2004, 09:05 PM
#3
4th Gear Member
Join Date: Dec 2003
Location: United States
Posts: 1,665
RE: TPS ADJUSTING?
you use the digital voltmeter to check the output voltage of the TPS by using the positive meter lead to probe the green wire coming from the TPS while having the negative meter lead grounded to the engine. with the key on but engine off and throttle closed all the way, the voltage should read less than 1.0 volts. too much less and the ECU is not as responsive as it could be as it sees the throttle open only from 1-4 volts, so if you set it up to .98 volts, then as soon as you step on it, the ECU "sees" it and will respond. you don't have to remove any screws to adjust it just loosen the two screws that hold it down and rotate it in place and watch the voltage change. then tighten down the screws when you get the voltage where you want it. you might have to remove the whole thing and elongate the screw holes in order to get it to move far enough to get to .98 volts, but this is easy to do with a Dremel tool. once you get it set with throttle closed, check the voltage at WOT and make sure it is above 4.0 volts. you should see the voltage change upwards as the throttle is opened and downward as it is closed. if not, then replace the TPS.
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