Buick Repair Questions? Ask a Mechanic for Answers ASAP
Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
Is or has the check engine light come on or have fault codes been checked at all to see what codes are set with this issue here?
Let me know so we can continue,thanks Pete.
Is it a lack of power you are feeling?
O.k.,if you havent done an exhaust back pressure test at all this should be done.I have seen several issues with restricted catalytic converters that will cause this type of fault here needing replaced.
The pre catalytic oxygen sensor is removed and the back pressure tester threaded into the oxygen sensor port.Then the engine is ran at idle to wide open throttle to see if the back pressure exceeds 1.5 psi.If it exceeds 1.5 psi at any rpm this indicates an issue with the catalytic converter needing replaced.
If you have already done this test or if this test is done and no issues are found let me know.
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