Rough idol and engine missing

[joehfd]

On my 95 Blazer the engine is idoling rough its also missing its a 4.3 motor and it has been tuned up, also the fuel regulator has been replaced. Could it be an o2 scenser?
joe

[cleanshavenrsx]

is there white smoke when you start it then goes away? mine does the exact thing. i replace my cpi, oil lines,wires,cap,rotor,plugsdid a motor and rad flush and still the same... i think its a lower intake gasket

[Jon Teeter]

Try cleaning the EGR valve.Take it off and spray inside real good with PB blaster or brake cleaner

[joehfd]

well the egr is new, I ran into a friend and he scaned it and the air temp circut came up soo i'm gonna replace the scencer an see wut that does

[joehfd]

Well I found out the reason for the air sencer prob the wire was off the only other code coming up is for a misfire on cyl 3. anyone no wut would cause that? I also found some corosion on the coil wire by the coil side could that be part of the problem?
Joe

[cleanshavenrsx]

make sure that wire wasnt melted by the header it happens all the time..