Grand Marquis V8-351 5.8L (1982)
Thermal Vacuum Valve: Testing and Inspection
Temperature Vacuum Switch (TVS)
1.
Apply 16 inches Hg to motor side of valve and trap. Cool to test temperature. Switch should hold vacuum as follows.
a. White TVS-normally open. At 40~ F must hold 5 inches Hg for 30 seconds. Should not hold vacuum above 80~ F.
b. Brown TVS-normally open. At 5~ F must hold 5 inches Hg for 30 seconds. Should not hold vacuum above 40~ F.
c. Purple TVS-normally open. At 30~ F must hold 5 inches Hg for 30 seconds. Should not hold vacuum above 60~ F.
d. Red TVS-normally closed. At 80~ F must hold 5 inches Hg for 30 seconds. Should not hold vacuum below 40~ F.
