Engine Performance problem
2007 Ford Taurus 6 cyl Front Wheel Drive Automatic 59,000 miles
The 'Check Fuel Cap' sign is on and refuses to go
away even after installing two other fuel caps. A locking gas cap is in place now. Replaced it with the original non-locking cap and another locking cap to see if that solved the problem. It didn't.
Would appreciate any help you can offer.
Thanks for your help with the 'Check Fuel Cap' problem. I couldn't locate any leaks, so took it to a garage near by to make an appointment to have them check it out. The Mechanic asked how much gas I had in the tank. Told him I was on my way to fill it up, which he suggested and put the cap on snugly. Filled it, drove a couple miles and 'Check Fuel Cap' alert on the dash disappeared. Am still mystified but happy that it may have been something as simple as being very low on gas. Won't let it happen again. Glad to know about your website. I'll be back, I'm sure.
The entire fuel supply system is tested for leaks that would allow fuel to evaporate into the atmosphere. A loose fuel cap is just the most common source of a leak, not the only one. Look at the hoses going to the tank, and the small vapor hoses going to the charcoal canister in the engine compartment. There is also a purge solenoid and its hoses that direct stored fuel vapors to the engine.
If you can't find anything loose, leaking, or cracked hoses, your mechanic can use a " smoke" machine to inject non-toxic white smoke under two pounds of pressure into the system. The smoke will be visible where it comes out through the leak.