throttle body tps question
throttle body tps question i'm trying to my trans am going after sitting for 6 years. when i fire it it surges unless i set my idle above 950 rpm's.. no biggie but my tps sensor wasn't reading so i ordered a new one, notched it so i can clock it. i can get it to read 2 at idle but my snap on solus ultra isn't showing any voltage. shouldn't i be getting a reading of 0.62v at "closed" throttle position?
Yes you should be getting a reading close to that.
At the TPS sensor, you will have a 5v ref circuit, a ground circuit and a signal circuit wire that tells the PCM what position the throttle is in.
The connector has to be plugged into the TPS to get a reading for the signal circuit wire.
When you said you set the idle to 950, exactly how did you do that?
Did you adjust the TB set screw?
The PCM has a desired idle speed it wants to achieve. If you open/close the TB, it's still going to try to achieve that desired idle speed until the IAC can't open or close enough to achieve it.
Is the car stock? Has it been tuned? Did it run OK prior to sitting for 6 years?
At the TPS sensor, you will have a 5v ref circuit, a ground circuit and a signal circuit wire that tells the PCM what position the throttle is in.
The connector has to be plugged into the TPS to get a reading for the signal circuit wire.
When you said you set the idle to 950, exactly how did you do that?
Did you adjust the TB set screw?
The PCM has a desired idle speed it wants to achieve. If you open/close the TB, it's still going to try to achieve that desired idle speed until the IAC can't open or close enough to achieve it.
Is the car stock? Has it been tuned? Did it run OK prior to sitting for 6 years?
