blinking check engine light and spark plug removal on a 2002 pontiac montana

[newfiejeff]

I have replaced the 3 rear spark plugs and #3 was the worst shape even smelled of gas. I replaced all 3 plugs and the problem is still there, itseems to me of a dead cylinder.
any thoughts anyone before i buy a code reader.

spark plug removal of a 2002 pontiac montana

#1 - jack the vehicle up and use jack stands to support the van in case jack gives out.
#2 - you can reach up and get the plugs from underneath the van, use a light to shine down on the back of the engines from up top
#3 - the first plug on the left you will need a 3/8 ratchet and spark plug socket
#4 - the middle plug you will need a 3/8 spark plug ratchet and a short extension and spark plug socket and you can get both hands on the ratchet and extension, one hand(arm) on either side of the exhaust pipe
#5 - the plug on the right is a bit difficult but not to hard you will need a 3/8 spark plug ratchet and a spark plug socket. To get the boot off you will need a pair of needle nose visegrips to pull it off as you can't get your hand firmly on it enough.
I have changed all 3 rear plugs in about an hour.
Make sure that you twist the spark plug boot first to break the seal they have with the spark plug, then pull your brains out with a twisting motion.

Jeff

[GTP Dad]

Replace the plug wires. They are probably bad and no spark or random spark is getting to the plug causing a misfire condition. Wires are more susceptable to damage than plugs so that is where to start.