View Full Version : TPS issue?
Black'Rado
May 30th, 2017, 08:04 AM
Just finished my 5.3 swap into a 79 chevy truck, loaded up my mail order tune and i plugged up my efi live to just check everything over. keyed on and noticed TPS voltage and percent was off.... around 18% and 1.4v so i changed sensor and tried to do the key off unplug reset...no luck. So i fired it up and logged it, it seems to idle hunt and was popping some thru the exaust. Any insight? 2111321114
Black'Rado
May 30th, 2017, 08:47 AM
*just checked voltage at TPS....Im getting 12v from the 5v reference wire??
Black'Rado
May 30th, 2017, 09:23 AM
OK, i tracked down my voltage issue, here is a better log after the fix, still seems to be a rough idle. 21115
joecar
May 30th, 2017, 05:47 PM
Did you fix the TPS voltage (what did you do)...?
~ posted by phone ~
Black'Rado
May 31st, 2017, 07:14 AM
Yes I fixed the tps voltage. Turns out when I redid the harness I managed to stick my fan wire in pin 45 instead of pin 42.
The last log I posted was after that fix, seams I still may have an issue causeing a rough idle
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