Question about 1993 Isuzu Rodeo
Attain a vacuum gauge and check the vacuum pressure at the intake manifold, it should reading steady needle at 18 lbs. of vacuum if not there is a vacuum leaking, if it reads 18 and the needle is shaking it may be a valve issue, most vacuum gauges come with a chart that shows the diagnostic procedures for use with vacuum gauges they are an invaluable tool for mechanical diagnosis and they can also tell you if your timing is off.
Posted on Nov 17, 2009
Testimonial: "I have some mechanical experience but this one puzzled me it showed no fault codes or no check engine lights. an 89 cent vac hose hose solved the prob"
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Posted on Jan 02, 2017
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