TPS Sensor issues

[87mustang4001]

Just rebuilt a 89 lx 5sp car. I ran the car for a few weeks with no problem. I went to check the TPS sensor for ($H#@'s And giggles) only to find that it wat sitting at 1.8 volts. I took it down to 1 volt. Now the car runs amazing BUT, the check engine light comes on now about 20-30min into my commute for work. If i turn off the car it restarts without the light on, and it takes another 20 min or so for the light to come on, ECT. I took the car to a friends shop, he scanned the ecm only to find that the code was a generic for a bad TPS sensor. I replaced it twice with new ones. it keeps setting of the light. What should i do. PLEASE HELP
5sp
89lx
F303- cam
65mm Throttlebody
ported heads
3.55's
A/C that chucks ice cubes!
This is my D/D

 

[Mustang5L5]

What was the code?

Was it a 23? That doesn't mean the tps is bad...but that the tps voltage at idle is not in a specific range (0.5-1.1 volts)

So if you get a code 23....you need to readjust the tps to the correct voltage range.

Is it a ford tps? They usually are dead on when you install. Are you sure you had 1.8v? I'd check again


http://www.stangnet.com/mustang-forums/825424-adjusting-your-tps-0-98v-not-necessary.html

 

[87mustang4001]

I had 1.8 volts with no check engine light. I put it down to 1v then .9v and now I'm getting a check engine light. I just put it up to 1.5 volts and no check engine light. Btw I put on a brand new B&G sensor.

 

[jrichker]

Follow Mustang5L5's link to the TPS adjustment and troubleshooting tech note. You may have some connection or wiring problems, and the tech note in the link will tell you how to troubleshoot them.

http://www.stangnet.com/mustang-forums/825424-adjusting-your-tps-0-98v-not-necessary.html