Engine stalls when idling, Auto Zone On Board Data code refers to emissions like air pump,?
1999 Chevrolet Silverado WT Truck 6 cylinder Automatic trans. 2 wheel drive. I was going to purchase an air pump but it was not listed for sale at auto stores. No pump is on the pulley system. Any suggestion for cause will be helpful. Fuel Pump and filter in line were just replaced with OEM parts. Son is going to school so money is limited.
Check your EGR valve.Make sure the hoses and wires are connected.
Unbolt it and make sure the valve is not stuck open from exhaust carbon deposit build up that flows through it.
The EGR should only operate at cruising speed (hwy speed) .
Not at Idle or full throttle.