Finding vacuum leaks

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Here's the best way I have found to diagnose bad running engine that may have a vacuum leak;
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Here's a method for diagnosing a bad running engine that may have a vacuum leak:
(1) get a soldering Propane tank and valve attachment.
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(2) unscrew the end of it so you have a threaded pipe without the nossle
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#Get a soldering Propane tank and valve attachment.
(3) attach a 2 foot piece of hose to the end
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#Unscrew the end of it so you have a threaded pipe without the nozzle.
(4) start the engine and let it warm up a bit
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#Attach a 2 foot piece of hose to the end.
(5) turn on the propane and run the hose all aroung the vacuum lines and the bottom of the carb too
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#Start the engine and let it warm up a bit.
(6) if the engine smooths out or revs up a bit you have found your leak
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#Turn on the propane and run the hose all aroung the vacuum lines and the bottom of the carb.
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#If the engine smooths out or revs up a bit, you have found your leak.
  
 
PLEASE do this in a well ventilated area due to propane gas and exhaust fumes!!
 
PLEASE do this in a well ventilated area due to propane gas and exhaust fumes!!
  
  
Another method. With the car running, using a can of brake cleaner spray down the hoses and vacuum connections. Notice a change in the running of the engine and you might have found your leak.
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Another method:
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#With the car running, using a can of brake cleaner spray down the hoses and vacuum connections.
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#Notice a change in the running of the engine and you might have found your leak.

Revision as of 18:51, 1 March 2007

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