Cleaned the MAF, still runs better when I unplug the MAF. SO I replaced the MAF with another known working one, same problem. NO CEL? Suggestions? It idles great, and runs well but when you rap the throttle it hesitates and boggs coming up when its plugged in. any thoughts. New plugs and wires(les than 100 miles0, before and after same condition. 4.6L THANKS.