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Yes, while the engine is running (in park) spray gumout/carb cleaner along the egdes of the intake. If the motor runs smoother or better then that tells you the intake is leaking. This, however, could cause a fire. A safer way is to use an unlighted propane torch. Turn the fuel on low and slowly move it along the hoses and gasket surfaces. When the engine speeds up, you have found your leak. if you are not sure if there is a leak in the intake ;a good way is when the engine is at idel carefuly place a rag over the carb or throttle body slowley closing the opening ( hold the rag tightly )while slowley placing the rag over the intaks ; if you notice an increase in RPM then you probley have a vacumm leak; to help pin point the leak use a spray with water and slowley go around the base of the carb ;manifold and vacuum lines when the RPM'S increase check that area for leaks ; cracked vacuum lines ;intake gaskets leaking this should help

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โˆ™ 2005-01-26 01:33:42
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Q: Is there inexpensive way to check for leaks in the intake manifold?
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Depending on what engine you have, Intake manifold; vacuum leaks, coolant leaks internal and/or external, oil leaks. Exhaust manifold; exhaust leaks, backfires.

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Yes. Antifreeze is actually pumped through the intake manifold. If the gasket is bad it is possible that it leaks out

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your engine will run too lean.

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Check for leaks in the intake manifold or a poor fuel pressure situation.

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Check for vacuum leaks. The gasket was known to blow out between the throttle body and the intake manifold.

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Not that I've heard of. Replacing the gaskets and inspecting the manifold for warping or cracks is the best way to stop intake vacuum leaks.

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Could be the intake manifold gaskets are leaking.

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Have the head gaskets checked and intake manifold gaskets checked for leaks. The 3.4's are known for head and intake leaks! Or a bad thermostat.

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start by checking the master cylinder break booster by unplugging the vacuum hose connecting it to the intake manifold and capping it, if it starts easier you might have an internal failure in the booster. If not, check for leaks in the hose its self and manifold leaks.

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If the intake manifold gasket has failed then it can cause many issues. Air leaks, known as vacuum leaks, will cause an erratic idle, stalling, and fuel problems.

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Check for any leaks in the surrounding areas. It may be a leaking hose, exc.

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I would suspect the manifold itself is leaking around the cooling passages. It will need to be removed and the gasket replaced.

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