Question about 2002 Buick Regal

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Supercharged 3.8 I just got done replaced head gaskets on my 2001 buick regal supercharged 3.8.I got the head rebuilt and got all new gaskets the whole nine yards. Once I got the engine back together and started it, it idled fine. Once i get to 2000 rpms. the engine bogs down real bad then eventually dies. Any suggestions on what could be causing this?

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  • troubleks86 Nov 09, 2008

    thanks for the suggestions. i found it was the catalytic converter about 3 weeks ago. i just havent deleted the blog but you are much appreciated!

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Could be a plugged catalytic converter or a plugged fuel filter, run an exhaust back pressure test, any muffler shop will do this, most times for free, the other thing to do is have the fuel pressure tested under a load, also clean the MAF sensor, a little dirt on the sensor wire wrecks havoc, You didn't leave anything in the intake runners did you? have seen seasoned technicians do this more than once.

Posted on Nov 08, 2008

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