Intake manifold or PCV valve hose may develop engine vacuum leak on Pontiac Firebird

The intake manifold or PCV valve hose may develop an engine vacuum leak causing a rougher than normal idle am may result in illumination of the check engine (SES) light.
RepairPal Verified
Average mileage: (–)
Engine affected: 3.1L V6
3 model years affected: 1990, 1991, 1992
3 people reported this problem
0 people shared problem details
Related Items:
i'mhaving a terrible time. my car is sucking in way to much air. first it would start then sta...
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oi...
The intake manifold gasket may develop external engine oil leak. The manifold gasket will need...
The oil leak was coming from underneath the oil pan and under the passenger side of the engine. I bought dye to see where it was and emptied out my oil and when I went to jug the used oil notices w...

Related Content