A vacuum gauge is being used to check for a restricted exhaust system. The vacuum at idle is 18 in. Hg. Which of these results indicates a restriction?
A) Vacuum at 2,500 RPM is 22 in. Hg.
B) Vacuum at 2,500 RPM is 19 in. Hg.
C) Vacuum at 2,500 RPM is 9 in. Hg.
D) Not enough information to diagnose
Correct Answer:
Verified
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