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This vehicle is 31 years old, the mating surfaces that the gaskets seal on are not as flat or straight as they used to be. They have been affected by expansion and contraction a lot of times and are no longer true.
also look at any plastic connections disenegrating at hidden areas like a heater control switch in the dash.
Go to a shop that has a "smoke machine" for finding leaks they can assist in locating the problem.
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∙ 13y ago
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What causes a 1973 350 Chevy to surge with it gets hot?
a vacuum leak.
Why does the engine die when stepping on the brakes 1973 Chevy 350 engine?
Sounds like a vacuum leak.
What causes a 350 Chevy truck to misfire?
Bad distributor cap, wires, plugs, injectors, low compression, broken valve spring, vacuum leak. Realey need to know the year, to help you better.
Why do you have no engine vacuum in 350 Chevy engine?
Air intake leak between the carb and the pistons action. the closer the the carb, the more likely.
Chevy 350 stalls?
check for vacuum leaks
Why is your AC not switching vents 1999 Chevy Van Express 350?
Check for vacuum leak either under hood or under dash Check for bad vacuum motor underdash Check for bad selector switch
350 fuel injected Chevy idles to high?
Check for a vacuum leak or sticking butterfly valve at the throttle body, or possibly a sticking throttle linkage or throttle cable.
Can you run a transmission with out the vacuum line on a 84 350 Chevy?
no
What causes a 350 Chevy engine to backfire at idle and when decelerating?
That usually means it's lean. Check all vacuum lines and gaskets for leaks.
What creates vacuum on a 350 Chevy engine?
The engine itself creates Vacuum once it is running.
Why does the idle race on your 87 350 tbi?
vacuum leak or fuel pump Randy
Can a vacuum leak effect the way a 1972 Olds 350 shifts?
most definitely
