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What should you do about getting 14 mpg average on 1999 Pontiac grand am se1?
Wiki User
∙ 18y ago
Check the computer codes. Borrow, rent or buy a code scanner at a local auto parts retailer. You might be having a problem with the O2 sensors, egr valve, throttle position sensor, fuel injector or other sensors that could affect the performance of the injectors. If an injector is sticking you might need to replace it. You can also add a little injector cleaner if that's all that's wrong but stuck injectors are often more difficult than that.
Wiki User
∙ 18y ago
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