Stephan D
Well-Known Member
Easy way to tell if it’s lean run situation is to manually shut the choke a little and see if it smooths out.
Great, I will try that one as well.
Easy way to tell if it’s lean run situation is to manually shut the choke a little and see if it smooths out.
Video of the vacuum gage while idling in his first post here.
Looking at it, I don't think its a valve issue, the way it wanders up and down. feel free to disagree
Unhappy 360 (At idle)
Hey Stephan, do you know what cam is in it or the specs and what is your idlespeed and idle timing in neutral/Park..
From the action of the needle,in the subsequently posted video, I agree with Mattax, who saidA Sticking intake valve will allow the piston to push charge back into the intake causing a momentary increase in pressure.
Looking at it, I don't think its a valve issue, the way it wanders up and down.
Have you got headers on that beast?
And if yes; are they properly sealed at the head, and at the collector, and in the merges?
Have you adjusted the idle mixture screws? Are they reactive? I mean does the idle slow down and seem like the engine wants to die if they are slowly screwed in?
I'm sorry, but I can't hear a misfire. I do see the vibrations though. Did increasing the idle RPM reduce or make worse the mis-fires? What happens if you disconnect the EGR Vacuum hose? Can you manually depress the EGR valve? Are you suffering a power loss?
But if you DC the EGR valve and plug the hose does the idle change?