B250 3/4 Ton Van V8-318 5.2L VIN T FI (1992)
Canister Purge Solenoid: Testing and Inspection
Solenoid Control Circuit
NOTE:
Use only fuel resistant hoses when servicing evaporative emission control system.
PROCEDURE
1.
Disconnect vacuum hose from solenoid to throttle body at throttle body and plug nipple.
2.
Connect vacuum pump to open end of hose.
3.
Ensure that engine coolant temperature is less than 140~F (60~C). Start engine and allow to idle.
4.
Apply 15 in. Hg vacuum and verify that it holds.
5.
Increase engine speed to 3000 rpm, verify vacuum is still held.
6.
Allow engine to warm up until the coolant temperature is above 158~F (70~C). Increase engine speed to 3000 rpm (within three minutes of
starting the vehicle) apply vacuum. Vacuum should not hold.
7.
Let engine return to idle and apply 15 in Hg vacuum. Verify that vacuum holds.
8.
Allow engine to run longer than 3 minutes and increase speed to 3000 rpm. Apply 15 in. Hg vacuum. Verify that vacuum holds momentarily then
bleeds off.
NOTE: If solenoid fails any test, check connections, and perform actuation test using scan tool.
