Re: could use a little help plz
Its unusual for an oxygen sensor to be reading badly enough to cause such poor running. Let me ask you this... On a cold engine, been sitting for a few hours, does it run normal for a few minutes and then start acting up once it is warmed up?
When you first start a cold engine, it is in open-loop mode, which means it is using presets only for managing fuel and spark, and ignoring sensors. Once it warms up to operating temperature, it switches to closed loop and starts using sensors to fine tune itself.
So if it works fine when cold and then goes to shit once warmed up, you can bet it is a sensor problem.
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