TPS adjustments, unclear on voltage readings.

Nathaninwa · 06-18-2011, 06:29 PM

I have done some more google searching for IDL voltages. Reading on several forums, 3.5 volts is common on the VTA for wot throttle for all engine, and the IDL voltage at wot being 10-14 volts might be a misprint in the books brought over some of the earlier efi systems. Its supposed to be 5 volts at wot, but I dont get that either.

Ill check today with the 4 tps's I have. I know all sweep from .0x voltage at idle to about 3.5 when adjusted on the TB on the VTA wire, but can reach 4 volts when the sensor is spun by hand......Ill check for IDL voltages, what they are at idle, make sure it gos to zero, then should read 5 volts or so at wot?

I wonder if a problem could be I dont have the NSW hooked up to the ecu? Looking at teh schematic, looks like I want to supply 12 volts positive at idle, or any point the clutch is not depressed?

06-18-2011, 06:29 PM	#3
Nathaninwa Intake Join Date: Jun 2011 Location: Aberdeen, WA Posts: 43	I have done some more google searching for IDL voltages. Reading on several forums, 3.5 volts is common on the VTA for wot throttle for all engine, and the IDL voltage at wot being 10-14 volts might be a misprint in the books brought over some of the earlier efi systems. Its supposed to be 5 volts at wot, but I dont get that either. Ill check today with the 4 tps's I have. I know all sweep from .0x voltage at idle to about 3.5 when adjusted on the TB on the VTA wire, but can reach 4 volts when the sensor is spun by hand......Ill check for IDL voltages, what they are at idle, make sure it gos to zero, then should read 5 volts or so at wot? I wonder if a problem could be I dont have the NSW hooked up to the ecu? Looking at teh schematic, looks like I want to supply 12 volts positive at idle, or any point the clutch is not depressed?