Would a faulty gas cap make the car hard to start (like a fuel pressure issue) and contribute to poor gas mileage? And how can a gas cap be tested?
Apr 28, 2014 at 7:59 PM
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WRENCHTECH
AUTOMOTIVE REPAIR CONTRIBUTOR
20,761 POSTS
No, it would not. If you suspect a fuel pressure issue, then read take a fuel pressure reading to determine that.