Surging idle. Almost dying.

[CPTMac689]

Just got in the car. Pulled up to stoplight and all of a sudden the idle starts bouncing back and forth between 500 and 1000 rpm. Almost dying and sounds like crap! NOT COOL!! I'll post video later.

 

[CPTMac689]

Alright, lotta readers, no comments. Any ideas? I know I read somewhere that this was a common issue on the coyote motor.

 

[ArizonaBOSS]

You sure that Sound Tube delete is sealed up properly? What you're describing sounds like a leak after the MAF.

Also check the connections on your PCV lines at the intake and to each valve cover, when I cracked a fitting on my JLT oil separator, the car had similar symptoms.

 

[CPTMac689]

Yeah, my first thought was the sound tube delete. It's the only thing thats changed. That'll be my first check when I get back tonight. Fantasy Football draft right now!

 

[302BOB]

Mine did that once when I started it with the clutch not all the way down. It sounded like it was running on less than all 8 cylinders & wouldn't improve when I gave it more gas. I shut it down & restarted it & all was good ...Thank God........

 

[CPTMac689]

ArizonaGT nailed it. The entire plug somehow got blown out so the hole was wide open. I should've known the problem myself. Serious brain cramp.

Thanks again Zona!