1994 All Other Makes All Other Models Repair Question
1994 Grand Am
Possible causes are an incorrect fuel mixture, incorrect timing, corroded spark plugs, a faulty oxygen sensor, sticking float, faulty fuel injector or a malfunctioning check valve.
Check the plugs first... If a cylinder isn't firing properly it will allow fuel to enter the exhaust manifold.
Usually raw fuel in the exhaust system will cause the catalytic converter to super-heat.
Are you sure that you have fuel in the exhaust system?
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