Indicators of a Broken Gas Cap

indicators of a broken gas cap

Bob Howard Buick GMC invites you to understand what the indicators of a broken gas cap are.

The 1st of many symptoms of faulty gas caps is likely a gas cap that is loose or a gas cap that won’t completely tighten. This may not seem important at first, but without an air-tight seal, the fuel system can be contaminated with grime and dirt. If your gas cap isn’t sealing properly, try checking the rubber gasket to be sure it’s not missing or brittle. If you have an old vehicle, be sure the metal gas cap isn’t damaged or bent. Both can lead to the gas cap issues and may even require buying a replacement from the manufacturer.


Gas Cap Check Engine Light

Diagnosing the Gas Cap Check Engine Light

What issues can an ill-fitting gas cap cause? How about a check engine light? An ill-fitting gas cap will not only let fuel vapors escape, but it can also let in dirt and grime. These fuel vapors could cause an error in the emissions system, which would light up the check engine light. Grime that gets into the gas tank could also damage fuel injectors. Perhaps the biggest sign of a faulty gas cap is the smell of gasoline inside your vehicle.

No Gas Cap on New Cars?

Can a Bad Gas Cap Cause Stalling?

These days you might see no gas cap on new cars, but if your car, truck, or SUV wasn’t built with a capless gas tank, it is not recommended that you drive without a gas cap installed. If your vehicle is a little older, there’s a possibility that gasoline could leak out from the tank during hard corners or spirited driving. If you drive your car without a gas cap, it can lead to reduced fuel efficiency because the gasoline could potentially evaporate without a fully-sealed gas tank. The gas smell is the gas evaporating from the gas tank, causing poor gas mileage.

Signs of Bad Gas

Signs of Bad Gas

If you have already looked at the gas cap, the problems you are having might be due to contaminated fuel. If your vehicle has problems starting, will not accelerate, or just isn’t running smoothly, then it’s possible you just have contaminated gas.
If your car does not feel right and you aren’t sure if a bad gas cap or just bad fuel, bring it here, and our experienced service technicians will figure out the problem and give you options for fixing the problem.



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Bob Howard Buick GMC is one of the best places to get vehicle repair in the Oklahoma City area. We proudly service all makes and models of vehicles. Visit our location online or in person to schedule service and repair for your car or truck. Our friendly technicians are ready to serve you.

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Main 405-928-0697 Sales 405-928-0697
13300 N Broadway Ext
Oklahoma City, OK 73114
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Contact Us

Main 405-928-0697 Sales 405-928-0697
13300 N Broadway Ext
Oklahoma City, OK 73114
Glovebox
AudioEye
Bob Howard Buick GMC 35.6064, -97.49765.