92 Truck - Toyota Nation Forum : Toyota Car and Truck Forums

sball · 08-15-2003, 12:41 PM

I have had trouble with my truck running at idle speed. I have been told that on this model it was common for the "Oxygen Sensor wiring harness" to fail. If so, does anyone know what that would cause and where is it?

22RYota · 08-15-2003, 09:23 PM

Try readjusting the Idle Speed Screw and set it to your desire RPM, put a tach on there and see where the rpm stands, it should be between 850-900RPM, Is this truck Carb or EFI.

sball · 08-18-2003, 07:16 AM

It is injected. I set idle speed, checked throttle speed sensor, and conducted a thorough check for vacumn leaks. Still does it. Occasionally the check engine light comes on and it begins to run rough then the light goes off and it smooths out.