Hi,
I have been running about 6-7 tanks of c16 this last 2 months.
I just replaced a nes set of NGK6097 gapped at 0.32.
Once i stat it up everything is fine until it warms up.
It sounds like the car is missing, the rpm is alittle lumpy 700-900 and also when i give it aliitle gas (at idle, holding at 1200rpm) the car doesnt sound smooth and feels alittle rough(maybe too rich?)

If the O2 sensor is gone, does it trip a chk eng light?

thanks in advance
\mike

A crapped-out O2 sensor won't necessarily trigger a check engine light. Sounds like it might be worth trying a replacement sensor -- especially if yours is the original or has a lot of miles on it. But of course there could be some other cause for what you're seeing...

Steve
SP74 & much more