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rdharper · 06-06-2006, 04:34 PM

Quote:

Originally Posted by SupraSport

VTA-E2 reads 930 Ohms at closed Checks out OK
VTA-E2 reads 4.7 KOhms at WOT Checks out ok
Idl-E2 Is open at all throttle positions.... hmmm not OK?

Diagnosis:
http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

Idl - E2 on my rig shows 10ohms in the throttle closed position, which is indeed < 2.3K as the chart shows. As the throttle is opened, there is a sharp change to open as the chart suggests.

Mine was misadjusted such that on the engine, the ECU only saw the open condition. That caused the engine to idle at 500rpm as the ECU "thought" the throttle was open and therefore the rpm's needed to be lowered Adjusting it correctly fixed the problem, allowing a smooth idle at 800rpm.