My blazer has sat over a year with me cranking it every couple of weeks. It sat for a little over a month and I had trouble with the idling. Basically it would fire off and slowly choke out. I dropped the tank and got all the old gas out,cleaned the screen, put a couple of gallons premium with a quarter bottle complete fuel system cleaner in with it. I drove it today and it spit and sputtered the entire 10 miles, but only choked out twice. It seems to want to choke out when I give it gas,or when it changes gears. When I got it home it was idling better but still a little off. What is causing this? What do I need to do to smooth it out? I'm stumped on this and any advice would be greatly appreciated!

 

Did you change the fuel filter? That would cause it to stall out under load.

Any check engine lights? I've had bad map sensors cause a vehicle to stall under load, also.

 

Yes I changed filter,dropped the tank and got bad gas out. Cleaned the screen and ran sea foam through it. I just changed the plugs and I'm getting the plugs today. I'll check the map sensor out though. Thanks

 

Mouse nest in air filter?