Will and open header cause my 3.8 mustang not idle car runs no idle

Asked by dspeigel Sep 09, 2015 at 07:39 PM about the 1996 Ford Mustang Coupe RWD

Question type: Maintenance & Repair

4 Answers
223,935

Rowefast answered 9 years ago

No. You put a header on it, so you are looking for free flowing exhaust, so I assume you must have added hp. to the engine. You still need to fine tune.

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159,085

Bob answered 9 years ago

To add to my previous comment. Unless upstream O2 sensors are not installed. If you have an open header and O2 sensor is installed I would think it should idle, but if the O2 sensor is missing from the equation it is possible it might not idle correctly.

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