How to adjust TPS sensor
Thread Starter
Racer
Joined: Dec 2007
Posts: 486
Likes: 0
How to adjust TPS sensor
My check engine light was on so I tested it and I replaced the TPS sensor. The light went out, and runs great now. Why do some people adjust it? Isn't it set from the factory? Or do you have to adjust them all? And how do you adjust it?
Burning Brakes
Joined: Apr 2004
Posts: 762
Likes: 2
From: Huntington ma
Depends. Are we talking about the '85 here?
If so - Yes, it must be adjusted, when you bolt it on there, to show a particular voltage (What exact voltage depends on what you are trying to do, the Factory setting would be .54) on a scan tool (or however else you choose to measure it) at idle. If you just slap it on there you have no idea what the voltage actually will be, and it's a relatively important input for the ECM.
Newer years (I'm not sure when it started - LT4 motors, maybe) do NOT have any provision for TPS adjustment, not mechanically anyhow.
If so - Yes, it must be adjusted, when you bolt it on there, to show a particular voltage (What exact voltage depends on what you are trying to do, the Factory setting would be .54) on a scan tool (or however else you choose to measure it) at idle. If you just slap it on there you have no idea what the voltage actually will be, and it's a relatively important input for the ECM.
Newer years (I'm not sure when it started - LT4 motors, maybe) do NOT have any provision for TPS adjustment, not mechanically anyhow.
Team Owner
Joined: Jan 2003
Posts: 20,301
Likes: 240
From: Summerland B.C. Canada
Your meter needs to be testing the 2 top wires on TPS. Shooting for .54 vdc +/- .075 vdc.http://members.shaw.ca/agent86/TB-TPS%2bMin-Idle.pdf
If this is about your 84, I can't comment.
Thread Starter
Racer
Joined: Dec 2007
Posts: 486
Likes: 0
Your meter needs to be testing the 2 top wires on TPS. Shooting for .54 vdc +/- .075 vdc.http://members.shaw.ca/agent86/TB-TPS%2bMin-Idle.pdf
If this is about your 84, I can't comment.
Melting Slicks
Joined: Feb 2006
Posts: 2,753
Likes: 15
From: backwoods upstate ny
