Half of my exhuast is running open header is that bad for car?

Asked by Jun 21, 2015 at 08:42 PM about the 1998 Ford Mustang GT Convertible

Question type: General

1 Answer

100,315

You should either run it full open or not at all, the ECM reads the exhaust pulse to set the air fuel ratios, so if half is open and the other you will get an A/F imbalance and that will eventually cause problems.

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