Hello,
I'm hoping somebody can help shed some light on this problem. My vehicle only does this as the weather gets cold. Throughout the summer I don't have the problem. It only returns in cold weather.
When I first start my vehicle the engine will idle normal for a minute or so then it will go into rev up then drop off then rev up loop over and over. I found if I put the vehicle into gear the strange idle stops. Also if left longs enough without putting it into gear for 10 or 15 minutes I believe it will correct itself and stop reving up and down. However I've only witnessed this once as I generally don't wait around long enough for it to stop. Like I said as soon as I drive it goes away. By the time I get to where I'm going it will sit and idle just fine?
Thank you for your time. Any responses will be greatly appreciated.
Thank you, Jeff