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My problem is similar. When I first start it, or when I let it idle for a while, it will run rich (and fast). But when the exhaust is warm, after I drove for a while, it gets slow on acceleration. If I push the gas down to pass on the highway, it acts like it is starving for fuel leaning out and the "check engine" light comes on. I am going to replace my oxygen sensor this weekend, see if that fixes it. I will post here on monday.

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