V8 Quattro V8-3562cc 3.6L DOHC (PT) (1990)
If not, perform idle switch check and re-check full throttle switch. If full throttle switch still does not close when throttle is fully opened, replace throttle
valve switch/potentiometer assembly.
CIRCUIT CHECK
1.
Check continuity between throttle valve harness connector terminals #1 & #2 and ECM terminals 52 & 53 respectively.
^
Should be continuous and not grounded.
If not OK, repair open or short in wiring.
2.
Check continuity to ground between harness connector terminal #4 and engine block.
^
Should have continuity with not more than 0.2-0.5 ohms resistance.
If not, repair open in throttle switch ground wire.