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I would need more info, but here are some ideas. I do not know the vehicle, however, if it has a catalytic converter, it may be suspect. It sounds like a situation that is happening after warm up, which a cat, would do.
My second though would be your EGR. Exhaust, Gas, Recirculation. It recirculates exhaust through the motor, to burn any unburned fuel. Since exhaust goes through this, it clogs, often.
Thirdly, I have had excperiences where the auto trans., is slipping after warm up. Check the fluid level, and service it. When they change the filter, look for an excessive amount of clutch material in the pan. Some, is normal. Smell the fluid. If it smells burned, investigate further, with professional help.
There are so many other things that, combined, would do the same. A tune up, carb rebuild, or injector cleaning, ect.
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∙ 12y ago
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