CLASS RACER FORUM - View Single Post - LT-1 issue

buzzinhalfdozen · 04-13-2015, 02:12 PM

John, not sure on your system but most I've seen have 5 volt reference to TPS as someone stated earlier not having the 5v volts would be a problem. Can you not view live data with a laptop on your system? If so use that to look at what the ECU is seeing in relationship to any and all sensors. I had this very thing on my set up a few years ago and it was a loose terminal in my TPS plug, it would read at times then drop out and the engine would hardly move the car. Also not sure but some systems you can calibrate most of the sensors including the TPS. Since the main inputs used for timing and fuel are the MAP and TPS, (there are others but less important as to throttle responce) I'd look closely at both those. BTW engine off does the MAP and BARO sensors read the same, and what is MAP reading with engine running?

04-13-2015, 02:12 PM	#5
buzzinhalfdozen Senior Member Join Date: Sep 2006 Location: Bellevue Ohio Posts: 984 Likes: 0 Liked 11 Times in 8 Posts	Re: LT-1 issue John, not sure on your system but most I've seen have 5 volt reference to TPS as someone stated earlier not having the 5v volts would be a problem. Can you not view live data with a laptop on your system? If so use that to look at what the ECU is seeing in relationship to any and all sensors. I had this very thing on my set up a few years ago and it was a loose terminal in my TPS plug, it would read at times then drop out and the engine would hardly move the car. Also not sure but some systems you can calibrate most of the sensors including the TPS. Since the main inputs used for timing and fuel are the MAP and TPS, (there are others but less important as to throttle responce) I'd look closely at both those. BTW engine off does the MAP and BARO sensors read the same, and what is MAP reading with engine running? __________________ Joe Buchanan SS/BX 3117 Last edited by buzzinhalfdozen; 04-13-2015 at 02:16 PM.