I have had my 07 supercrew for two full summers now. Three days ago it began idling very rough with the A/C on. I know the compressor places a good load on the engine, but this seems excessive. It has never idled rough like this before with the A/C on. It's almose like it's missing on a couple cylinders. It goes away at about 1000rpm. I am planning on calling my dealership tomorrow, but I was curious if anyone else has had this problem or if anyone has an idea about what might be cause this rough idle.

 

every now and again ill get a rough shake. kinda like its not getting any fuel.

 

Does the shake just come an go? If that's the case I won't worry too bad about it. I was wondering about bad gas.

 

Mine has this also but it is very mild. And only when the truck is first started.