Mechanics

CHECK FUEL CAP?

2003 Ford Explorer • 116,000 miles

I replaced the gas cap but the check fuel cap light is still on.
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Mariannet
March 23, 2012.



The gas cap is just one of many things that can leak. Hose clamps rust off. Vacuum hoses dry-rot. Valves leak. The easiest way to find leaks in this system is with a smoke machine. It injects a white non-toxic smoke at 2 psi, then you search for where it's seeping out. You might be able to borrow one from an auto parts store that rents or borrows tools.

Caradiodoc
Mar 23, 2012.