My car loses acceleration while driving.
While driving long distance my car loses acceleration, i have pulled over shut it
down and restart the car, after a few minutes than it works again. I have taken
the car to the dealer and they have never heard of it. HELP!!!
Would start with easy things first such as a new fuel fliter, cleaning the throttle body, and having a look at the air filter. Since you brought it to a dealer I hope they did a scan for any pending codes or stored ones. Unfortunately they don't always show something. Without more info ideas would be just speculation but have a feeling it has something to do with electrical that would be effected by heat such as a MAF sensor (dirty) sometimes they can be cleaned with CRC cleaner. Other Ideas are throttle position sensor/throttle body or compression loss. Those are just ideas. Hopefully it's just a fuel flow issue. Would not just throw parts at the car at this point, as mentioned try some cleaning and a new fuel filter. Good Luck!
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