1999 LS1 tach voltage
Thread Starter
On The Tree
Joined: Feb 2011
Posts: 130
Likes: 0
1999 LS1 tach voltage Im installing a fuelpump controller in my car and i have free usable wire from ECM which is suppose to go to tach. I dont need tach, so im planning to put tach wire to the puelpump controller. What kind of voltage tach wire is producing???
I need 0-5v to the controller.
I need 0-5v to the controller.
Thread Starter
On The Tree
Joined: Feb 2011
Posts: 130
Likes: 0
Thanks WhiteBird for information. You confirmed my expectations. Guess i have to pick my voltage from TPS wire. I dont have my harness connected so i cant measure, but i presume throttle closed its 0 voltage and throttle open is 5V. Can someone confirm? Would be nice to know when i soon order my controller.
Joined: Nov 2003
Posts: 11,329
Likes: 346
From: Jacksonville, FL (originally from Toronto Canada)
The throttle position sensor uses a 5V reference signal from the PCM but its output varies only from about 0.6V at idle to slightly above 4.0V at WOT.
Thread Starter
On The Tree
Joined: Feb 2011
Posts: 130
Likes: 0
Oh man, that worrys me if i can get only 80% out of my controller that way.
You seem to have good knowledge about these electronics. Do you know where i can find good voltage to drive the controller and what kind of fuel controllers people are using here with success?
You seem to have good knowledge about these electronics. Do you know where i can find good voltage to drive the controller and what kind of fuel controllers people are using here with success?
