Does anyone else ever notice almost like a miss at idle on the LT1s? My Camaro always seems like its missing at idle, but when driving its fine. I changed the plugs and wires and it still feels like this. My friend has a Firebird that does the exact same thing, too. Do they just seem to run kind of rough at idle or something?

 

I get the same thing only mine shows up on scanner as random missfires. After replacing opti, wires, plugs, coil its still there. What irks the hell out of me is the fact it runs perfect at any thing other than zero throttle. Also replaced iac ,still didnt get rid of it

 

My 94 does the same thing, but only after it goes into closed loop.

When cold, it idles really smooth, and the car has lots of low-end grunt. As soon as it warms up to about 190, it misses, and bogs till about 2000 rpm.

Opti, plugs and wires are new, along with O2's, egr.

What sensors are ignored during open loop, other than the O2's?
MAP? IAT?KM?

 

Just the O2 sensors are ignored, PGR.