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Losing power during acceleration

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A little background: this has happened to me twice in the past week. Driving on the highway, I will press the accelerator to the floor in order to pass someone. All of a sudden, the engine will lose power, and I start to slow down, but then quickly regains some power, loses power, gains power, etc.

After this happens, the check engine light comes on, as well as a message telling me to service traction control and stabilitrack. The car seems to run fine as long as I don't depress the gas pedal to the floor. When I turn the car off, the engine light goes away, as well as the traction control and stabilitrack warnings, and don't reappear until the problem happens again.

Any ideas before I bring it to the dealer?
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Yeah, I think we'd need a code to make a decent guess. Some parts places will read it for free. While the light may be off, it should be in the history as long has it hasn't been too many on/off engine cycles since the last occurrence.

When you take it to the dealer, make sure you get the light to come on at least the day before if not the day of the visit. That way it should still be in the history.
 

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Discussion Starter · #4 ·
Thanks guys. I've been trying to reproduce the problem the past couple days with no luck. If it happens again I'll run over to my autozone and have them scan for the code.
 

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Having this issue now at 80k miles. Had a P0304 misfire code. Figured well overdue for plug change, so changed plugs and coils. Still having the same issue. Stabilitrack and traction control service message flashing on dash. Thinking fuel injectors may be clogged.
 

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Having this issue now at 80k miles. Had a P0304 misfire code. Figured well overdue for plug change, so changed plugs and coils. Still having the same issue. Stabilitrack and traction control service message flashing on dash. Thinking fuel injectors may be clogged.
Have you checked the coil pack as well?
 

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Yes. Changed the coil pack when I did the plugs. Took it to Valvoline today and had an oil change, transmission flush, and engine flush done. Took it back out on the highway and seems to run great now. No stabilitrak or traction control service warnings popped up when "punching it" to get around traffic like before. Pretty sure the injectors and throttle body were probably gummed up a bit. Added some fuel additive to the tank and topped off with premium just for now. Been using 87 normally, and that's probably a part of the problem. I get this feeling gas companies are cutting their supply with more ethanol to "stretch" their supply these days, but that's just my suspicion. Any how I'll report back if there are further issues.
 
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