B Series Truck 2WD L4-2184cc 2.2L 2200 2-bbl (1990)
Idle Up Control Valve: Testing and Inspection
Idle-Up Solenoid Valves (With Both A/T and A/C)
Idle-Up Solenoid Valve Testing (Part 1)
1.
Warm up engine and run at idle.
2.
Connect tachometer.
3.
Disconnect vacuum hose from port "A."
4.
Connect intake manifold vacuum directly to port "A" and verify engine speed is 1300-1500 rpm.
5.
If not, correct with adjust screw.
Idle-Up Solenoid Valve Testing (Part 2)
6.
Reconnect hose to port "A."
7.
Disconnect hose from port "B."
8.
Connect intake manifold vacuum directly to port "B" and verify engine speed is 920-970 rpm.
9.
If not, disconnect vacuum hose and correct by turning adjust screw on diaphragm head.
