OK i have a 2002 S-10 4.3l Vortec was idling fast then died will not start now
when I arrived home and placed it in park the engine was idling at 2500 RPM. I likted the filter duct off the intake to see what position the flapper was in and the truck died --flapper was closed. I have not been able to start the vehicle since. I recently had to change a head Replaced all lifters and pushrods and installed a new spider truck was running better than it had in a long time and we drove it for about a month. Now this --any ideas?