Coming home from work today I started getting smoke coming out of the PCV holes in the valve covers as I have them vented to atmosphere. No smoke coming out the pipes. So I'm thinking I'm getting excessive blowby in a cylinder. I also am WAY down on power and it misses one cylinder every rotation.

But could it be anything else? A valve? EGR?

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plates: BLWNWS6
L98 w/ATI ProCharger, 2 core intercooler, 9psi pully. Dynoed at 452 RWTQ
Pro-built Stage 3 700-R4 w/Continental 2200 stall TC.
C5 wheels and tires.
Me, my car and I
"Speed kills but it makes me feel alive" - White Zombie
Crazy street-racing idiot member of the All-Powerful Nor-Cal crew.

 

Sounds rather like a toasted piston. Do a compression check and listen for air escaping on the dead cylinder.

Bummer...

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"So many Mustangs, so little time..."

 

I vote for busted rings/ring lands.

Get a compression test and leakdown test done to help narrow things down.

 

TTT

 

i'd say either intake gasket or cracked piston.

 

i say a piston...intake gaskets dont do that...

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K&N,MSD Gm Coil,TB Bypass, Flowmasters with Hand Made Tips, Msd Heli-Core Wires, Cold Air Intake, Dynomax High-flow cat
Next:
Cam, Rockers, Pulleys, Msd 6a...maybe a 3.4 crank too..boost torque a bit...

 

i would have to say ring- piston setup
too bad man your engine is dead

 

Sounds like rings are gone or piston to me.

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Superman
Rev'n to Seven

 

on a supercharged engine, it can push oil out of the valve covers and cause a miss if the gasket is blown at the bottom, just as a naturally asperated engine causes a constant vacuum and miss with the intake gasket blown at the bottom.