TPS reading is unstable.

NoDOHC · 06-05-2010, 08:25 PM

If you unplug the wiring from the TPS, but leave the wiring otherwise intact, does the behavior continue? If so, it is noise.

If not, it may be noise, but is likely due to mechanical vibration of the wiper in the TPS.

If there is no jumping with the TPS unplugged, get an ohm meter and watch the resistance between the wiper of the TPS (center terminal) and one of the other two. If it moves while the engine is running, the TPS is experiencing too much vibration. you can couple it with rubber hose to the shaft (old trick that works pretty well) and mount it on rubber.

06-05-2010, 08:25 PM	#1
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	If you unplug the wiring from the TPS, but leave the wiring otherwise intact, does the behavior continue? If so, it is noise. If not, it may be noise, but is likely due to mechanical vibration of the wiper in the TPS. If there is no jumping with the TPS unplugged, get an ohm meter and watch the resistance between the wiper of the TPS (center terminal) and one of the other two. If it moves while the engine is running, the TPS is experiencing too much vibration. you can couple it with rubber hose to the shaft (old trick that works pretty well) and mount it on rubber. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

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