What makes a catalytic converter to get cherry red after the car warms up?
30

Asked by FYJIMO Aug 23, 2014 at 10:05 PM about the 1996 Pontiac Grand Am 2 Dr GT Coupe

Question type: Maintenance & Repair

After the car warms up the catalytic converter gets red.

4 Answers
143,705

T_S_T answered 9 years ago

Dumping excess fuel,o2,s may be bad causing this.

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30

FYJIMO answered 9 years ago

It was one of the coil packs was bad, two of the plugs weren't firing & it was just dumping raw gas into the exhaust.

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