what are symptom for bad front manifold catalytic converter

5

Asked by Feb 20, 2014 at 08:02 AM about the 1999 Lexus ES 300 Base

Question type: Maintenance & Repair

i just had ignition coils replaced. while machanic was trouble shooting motor he said the converter was turning firy red from heat just below oxygen sensor on front manifold

1 Answer

217,545

The reason it is getting red is unburn fuel is leaking into your convertor. Either from a misfire or leaky fuel injector.

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