after i failed i found my timing was advanced almost 5 degrees.also my vtc and knock sensor were switched up.aannnnnd my ecu had a code 34 i guess ididnt clear properly. would i be able to just pull the vacuum from the egr solenoid that goes to the valve and suck on the hose to see if the engine stumbles?i dont have the pump and whatnot to do it the way you said.