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O2, CAT or something else? Bogging down 700

posted by  someone claiming to be fixit2003 on  Sun Dec 31 03:13 CST 2006 [RELATED]

If you have a vacuum gauge you can check for exhaust/cat blockage. Connect the gauge to the intake manifold after the throttle body. With the engine idleing and the ac off you should get 15-17 inches or so. Run the rpms up to around 2500 and the vacuum should not change much. Any drop of 3 or more can be a good sign of exhaust restriction.






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