Vehicle is a 1995 Pontiac Grand Am SE, four speed auto, 2.3L "Quad Four"
The other day it pops up with the SES light. I had the codes read and it
says "Engine misfire detected cylinder 4, dejected"
I suspected a misfire by ear before, and now the computer is picking it
One by one, I've replaced the spark plugs (twice), spark plug boots,
coil housing, and both coils. None of it has worked.
Some details of the symptom. It will not misfire when I start it up, and
it won't misfire while cruising down the highway, or if you step on it.
The first time that it picks up a misfire is after it's all warmed up,
and you come to a stop. Most of the time it is just as I ease into the
Now...... I'm stumped, and tired and exhausted with trying to figure it
out, while spending money.
Any ideas appreciated.....