Rough and/or High Idle Due to Engine Vacuum Leak on Chevrolet Lumina

The upper intake manifold gasket and/or a PCV vacuum lines/hoses can develop vacuum leaks with age. This type of leak can result in a higher that normal or rough idle.

RepairPal Verified
Average mileage: 91,000 (91,000–91,000)
Engines affected: 3.1L V6, 3.4L V6
9 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 2001
13 people reported this problem
2 people shared problem details
Problem developed after replacing temperature sensor. Found vacuum leak on PCV line where it "T"s into throttle body/Intake. Replaced Vacuum line.
2001 Chevrolet Lumina- 3.1L V691,000
Current problem.
Related Items:
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases,...
How long should an intake manifold gasket replacement(upper and lower) last?
Engine has 143K miles on it. I'm the third owner. Leak is at bottom left of the front of engine...
I am getting poor gas mileage and oil in the throttle body. Car is running rich(code 45). It...
Leak of and orange colored fluid and water are leaking from the manifold and we were told hose...

Related Content