i cant remember when it started, but my engine shakes. its really noticeable at idle, but when im under the hood and i bring the rpms up manually by the tb, i can still see the engine shake every second or two. sometimes it will shake for a split second....sometimes it will shake for 2-3 seconds straight. i am wondering if i have a vaccum leak somewhere, cuz i have changed plugs twice and wires once since this has been going on, so i didnt think it was a misfire. this happened way before my cam install. all i can remember is it has been there ever since my "header install". i got pacesetters with no AIR provisions, so i just removed the AIR stuff(hoses, pump, solenoid) well, i plugged the little vaccum line that comes from the back of the motor with a screw, so i dont think im leaking any air. i dont know where else i would have a vaccum leak. oh yeah, ive also replaced o2 sensors since. anyway, does this shake sound like a vaccum leak or a misfire?? it happens every couple seconds, and u can actually see the motor shake back and forth. any ideas?? anyone else had this problem with pacesetters?

 

Get Autotap or EFILive and have a look with that. Any codes?

 

i dont think im throwing any codes cuz my ses light isnt coming on. if a code was erased before, and i was still getting misfires, wouldnt it trigger the light to come back on?

 

mine does the same thing, i'm just gunna shrug it off as normal. ever since my header install its been there, prob needs a tune. but it didnt count any misfires on the ole tech2