Question about Toyota Avalon
Get the O2 sensors checked.
A bad o2 sensor CAN make you have bad gas mileage. If its bad it will tell your computer to mix the air/fuel wrong and CAN make your mileage go bad.If O2 sensor checked ok.then get the vacuum checked.If there is any vacuum leak then this can be the possibility for low gas mileage and car hesitation.Check the vacuum hoses too.
An engine will often hesitate, or stumble, during acceleration due to the effects of bad gas. Engine hesitation often occurs as the result of incomplete engine combustion, which can be caused by bad gas, in addition to fuel delivery problems and spark plug misfires. Typically, bad gas that has insufficient octane, which reduces its combustibility, is the most likely type of gas to produce engine hesitation.
engine needs a combination of both gasoline and air in order to start and run. Clean, high-quality gas is necessary to maximize engine operation. Bad gas can seriously disrupt normal engine operation .
check the fuel system. Get the fuel pressure checked. If its less then its quite possible that fuel pump needs to be replaced and fuel filter is got clogged.clean the injectors.if its leaking then it needs replacement.
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Posted on Jul 30, 2010
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Posted on Jan 02, 2017
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