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95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

Vacuum Problem

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Old 05-25-2004, 05:35 PM
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Vacuum Problem

My runner is idling rough and it was suggested it may be a vacuum problem. The guy who installed my engine tested for leaks. How would I go about diagnosing/fixing a vacuum problem?
Old 05-25-2004, 07:51 PM
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Originally Posted by Praufet
My runner is idling rough and it was suggested it may be a vacuum problem. The guy who installed my engine tested for leaks. How would I go about diagnosing/fixing a vacuum problem?
use some small hose lying around and replace the vacuum lines one by one until you find the problem. That may work, not sure tho
Old 05-25-2004, 08:13 PM
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Check to see if the throtle body is sealing. That was my problem and it took me a year to figure it out!~
Old 05-28-2004, 04:31 PM
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spray some carb cleaner around all the vacuum hoses one by one with the engine running..............if the idle jumps up when you spray you have a leak at that hose
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