check engine bank 1 rich? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 12-14-2009
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check engine bank 1 rich?

alright engine light came on had autozone scan said O2 sensor on bank one or running to rich so i replaced the O2 sensor. light still on how is it running to rich?>
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Old 12-15-2009
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bump
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Old 12-15-2009
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really anyone?
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Old 12-15-2009
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check your Fuel Trims - I made a great thread about how to do this but unfortunately none of the mods stickied it!
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Old 12-15-2009
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teach me how to sir lol im all ears
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Old 12-16-2009
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seriously? ha
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Old 12-16-2009
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To read fuel trims you need a scan tool that has live data stream...
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Old 12-17-2009
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Have you tried having your ECU reflashed? the reason I ask is because I had an O2 sensor go bad on me and had it replaced. Engine light stayed on even after the repair was complete. So they reflashed my ECU right in front of me and that seemed to fix the problem on mine. How about a little more info about this situation please? Was it one or both O2 sensors or what? and what happened to cause this?
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Old 12-18-2009
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um new engine i did a engine swap in this truck is a 98 block...
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Old 12-18-2009
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Quote:
Originally Posted by teambluemxer View Post
um new engine i did a engine swap in this truck is a 98 block...
Oh ok. This could be a tough one to solve man. If you have already replaced the O2 sensors and reflashed the ECU then I don't know what else you could do except to have it reprogrammed completely by the factory. You might have an air fuel problem. If it's reading too rich Bank 1 then you might have to have new fuel injectors as well. Too rich means way, way, too much fuel going into the cylinders and not enough air to mix for it burn properly. I'd also check your air intake system and the MAF too. That will most likely be where the problem lies. Take it to a ford dealer. and ask them to do a dianostic on it. They have Live stream data and could tell you what the problem could be. Autozone just has a pointer type scanner for basic repairs not the complex ones like you have.

Last edited by knightmare1015; 12-18-2009 at 08:40 PM.
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