Your car can start and run... But if your spark plugs are old..??? It can also make car drive very slow..
You might look at your static pressure on the fuel pressure regulator. It's usually located in the fuel rail area .
Cleaned out Cadillac converter. No change end blockd exhaust to see where the leak is didnt help
Maybe it could be the catalytic converter plugged up or fuel filter or fuel pump or even timing chain or belt.
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