Quote:
Originally Posted by chiccokaiser1
I had a misfire on cyl 3 so I replaced all sparks with ngk # 4344 ltr 5ix-11, are they correct? I still have same issue..
I have seen that on the metal contact surface between spark and spark plug there was some kind of white grease, what is it for  ? Shall I put it back on?
Thanks |
The Good Book.
AC spark plug book calls for AC plug no. 41-965 at .049 gap.
Most GM engines runs and does better on AC spark plugs
If same problem first check for good spark to that cylinder.
If no spark switch wire or coil with one that is firing good.
Post back what that does.
And if ou are getting good spark to all plugs.