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yes they were put on there for a reason ,,a vacuum leak will make a car run terrible.
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∙ 15y ago
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What cause an engine to idle high?
A vacuum leak could cause that.
Would bad pistons cause the engine to shake?
Most definitely. Any miss will cause the engine to shake. A vacuum leak will also cause this.
What happens when a vacuum line is broke on a PCV valve on a 305?
The vacuum leak will cause the engine to run lean.
Can a vacuum leak at the manifold cause the check engine light to come on?
Yes
What could cause engine to idle irregular?
A vacuum leak is one possibility.
Will a vacuum leak cause the check engine light to come on?
It could.It could.
Will a vacuum leak always make your engine run rough?
No, on a fuel injected engine it can cause high idle speed.
Will a small amount of gasoline in a diesel engine damage the engine?
No - a small amount will not damage the engine, though may cause it to run badly. However, a larger amount can cause serious damage, and the tank and engine should be drained.
Will a loose gas cap cause a 2005 Nissan Pathfiner to start running badly?
No, but it could cause the check engine light to illuminate.
What cause power lose on a 2000 BMW 528i engine?
Power loss on an engine is generally due to an air problem. Check the vacuum lines on the engine to see if there are any leaks. Leaks in a vacuum line cause a car to either run to lean or rich. This will negatively effect the performance of the car.
When running the AC what would cause the temp to go from cold to hot and the air flow to go from vent to defog for no reason?
A vacuum leak in the vacuum supply line from the engine can do that. Many vehicles use engine vacuum to operate the HVAC system. If there is a loss of vacuum to the system it will default to defrost.
Will a vacuum line leak cause your computer in your 1997 Pontiac grand am to mess up?
It might cause the "check engine" light to come on.
