Doesn't help the guy before me messed with the wiring its a damn mess I talked to my buddy he kinda has me sold on junking the tbi and switching to carb this blazer is a damn headache it just baffles me that if I unplug the advance it'll run fine plug it back in runs like shit for about 5 mins then it'll idle fine till I shut it off once i,start it again same process again.