Loosing speed on this highway, rough idling once off the highway, but fine when turn off AC?


Asked by Jul 17, 2016 at 04:57 PM about the 2003 Chevrolet Venture LS Extended

Question type: Maintenance & Repair

Around town, fine.  On long(er) trips (2+ hours), runs fine on the highway until I stop (rest area, coffee, food, etc.)  5-10 minutes after restart, starts loosing power on the highway and when accelerate, nothing happens.  Pull over to side of road, wait 10 minutes or so, starts up fine and then same thing happens.  Pull off highway, go town roads and car is possessed.  Goes 40-50 mph by itself.  No foot on gas.  Runs very rough and almost dies at stop lights and very slow speeds, but then gets going again with a little coaxing with the gas.  Finally dies after about 1 hour driving like this.  Note, AC going entire time (it's in FL and in July).  Let sit for approx. 15 minutes.   Tried one last time before calling AAA.  Started right up, didn't turn on the AC this time and ran fine the rest of the way home no matter what speed I drove.

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