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1996 Chevrolet Monte Carlo

 

Question: car starts and runs but doesnt have much power like if you step on it it kind of

Question

barry christianson, Mondovi, WI, July 01, 2011, 07:02
 Rookie

could the cat be plugged or is it something else

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  • Answer #1

    Jim Taddei July 01, 2011, 10:51
     Master

    It sounds like you may have a plugged catalytic convertor on your 1996 Chevrolet Monte Carlo. The best why to confirm this is to test the exhaust back pressure. It should not be more that 1.5psi at 1500 rpm with the transmission in park.

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    barry christianson, July 01, 2011, 13:38
     Rookie

    how do you test the back pressure of the exhaust

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    Jim Taddei, July 01, 2011, 13:45
     Master

    The best way to check exhaust back pressure is to remove the O2 sensor in front of the suspect catalytic convertor and install a special fitting with a heat resistant rubber hose attached. You can then connect a vacuum/pressure gauge to the hose and perform your pack pressure test.

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    barry christianson, July 30, 2011, 19:30
     Rookie

    ive been told that there is no pressure in cylinder number 2

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    Jim Taddei, August 01, 2011, 08:51
     Master

    If compression is low on cylinder #2 that would indicate a mechanical problem. Further diagnoses will be required to isolate the cause.

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