hi i am having a problem the car will only start and stay running if you completly cover the intake with your hand otherwise it just cranks over this makes me think that there is a vacuum leak but all hoses are connected and look good i cant seem to get it running is there something else i can check?
intake as far as manifold(you cant have your hand over it) or intake like the throttle body?
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repainted s13....eibach springs, shaved door handles, side markers, antenna, and front emblem, 17' Nippons, SR swap, Megan racing exhaust
To check the intake system for a vacuum leak, attach a vacuum gauge to a full vacuum source. A good place to connect to is the charcoal canister. There should be three hoses connecting the carbon canister. Two of the hoses go to a purge valve that's built into the canister. The second larger hose off the purge valve should be your vacuum line. With the motor fully warmed up, the reading at idle should be 18 - 20 InHg. At 3,000 RPM, it should be 21 InHg.
If readings are under 18 InHg, check the intake manifold nuts to make sure they are tight. Also check the intake plenum bellows at the throttle valve and at the MAF for cracks or loose clamps.
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