Explain testing a TPS this is my first car.??? There could be a problem with the 75mm TB. Have you tested the TPS ? No one could answer that question for you without diag on your part.
Ill give this a try.Have you tried checking the voltage on all the 3 wires with key on engine off? You should read 5v on the orange wire, and somewhere between .7-1.0 on the green. The black wire is ground. You can check the resistance on it. Also check the white connector of the salt and pepper connectors. The TPS runs through that. A weak connection(which is common) can jack the TPS up, among a lot of other things. Also 75mm TB on a stock car is pretty big.
Don't fixate on the tps setting, set it between .97 and 1.0 and forget it, oh reset the computer. Every time you turn the car on the computer read tps position and goes with it.man everytime i set it and its fixed, i go around the block and the voltage changes? Im gonna buy a new tps and a 65mm throttle body and im rpetty positive that will fix it. i will test it
No but like I set it to that and then the issue is fixed idles perfect and then as soon as I drive it and then come back its bad again. and i am on speed density so i dont think the computer would fix itself would it?Don't fixate on the tps setting, set it between .97 and 1.0 and forget it, oh reset the computer. Every time you turn the car on the computer read tps position and goes with it.
the important thing is the reading is linear without bouncing back to 0 at any time during throttle opening.
Mustang TPS Adjustment - 0.999999v not necessary
EDIT: This post applies to 86-93 5.0 Mustangs. Seems to be a common myth, so lets sticky a thread explaining how the TPS works. Jrichker has provided the basic TPS guideline to follow. I'll just preference it with this. Adjusting your TPS to .99999999 volts is not necessary at all. There...www.stangnet.com
i set it then after going around the block it spikes to past 1.0 ampWhat do you mean when you say 'it's bad again',