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hannahc915 12/18/2019

2004 Isuzu Rodeo S 6 Cyl 3.20L


Engine Misfire check engine light question

I accidentally used a mixture of gasoline and oil to fill up my gas tank. Obviously I assumed it was just regular gasoline, and didn't notice until I set the tank down and saw OIL +GAS in black marker. Anyways after that my check engine light was blinking which I know is an engine misfire. I'm 99.999% sure it's an Air to Fuel Ratio Imbalance since because the light stared blinking right after this happened, plus I was driving around earlier with no problems and had my car inspected a week ago. Anyways, I'm a complete idiot and know nothing about any of this stuff but i'm just wondering if I go to a gas station and fill my car up with normal gas as I always do will this fix the problem? Filling my tank with gasoline would to make since logically since it 's literally called air to fuel ratio imbalance but like I said I'm a complete idiot and know nothing about cars, i'm just going off of what I googled in the past hour. ANY ADVICE IS GREATLY APPRECIATED THANK YOU SO MUCH!

1 Answer


Jimm 12/19/2019

First question - how much of the gas + oil mixture was put into the fuel tank? If more than 2-3 gallons, then it is recommended to drain the fuel tank, and refill with fresh gasoline.

The fuel and oil mixture already in the fuel system to the engine can be purged, once the new fuel is in the fuel tank. To do this - simply open the fuel pressure relief valve on the fuel rail at the engine, and crank the engine a few times using the starter.


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