1992 Isuzu Amigo 4 cyl Two Wheel Drive Manual 156000 miles
I have no vacume to the egr valve from the electrical vacume switch. I have tested the switch and it is good. What I have found is the two wire connector that goes to the switch has no ground signal on it's pin. The other pin registers 12 volts with the key on or motor running. Where does this pin get its ground? I assume it gets its ground signal from the ECU but now what componet or sensor is not telling the ECU to ground the switch thus allowing vacume through to operate the EGR valve.
I have tried a jumper wire at the EGR temp sensor thinking that It would be the ground source but no.
Monday, September 6th, 2010 AT 11:05 PM