Reoccurring COP failures
Thread Starter
|
Senior Member
Joined: Feb 2001
Posts: 129
Likes: 0
From: Garland, TX
Reoccurring COP failures
Two weeks ago, I replaced the #2 COP after it shorted out and blew the #30 fuse, left me stranded on the side of the road and a trip on a wrecker.
Yesterday I started getting a rough idle and a low rpm (idle to 2100) miss.
Today, my light came on. OBDII said it was the #2 again. I replaced it and the light is gone, but I can feel that it is idling a little rough. I cannot feel any mis above idle.
In the life of the truck (190,000), I think I am around 16 COPs being replaced. The first one went out around 700 miles. I am not sure what numbers, but #2 and #5 seem to be the recurring ones. I have used Motorcraft, Duralast and whatever the O'Reilly brand is. None seem to last.
Early on in the life of the truck, I had to replace the crank position sensor and that helped for a while.
Any ideas on why I am having this reoccurring problem.
Thank you.
Yesterday I started getting a rough idle and a low rpm (idle to 2100) miss.
Today, my light came on. OBDII said it was the #2 again. I replaced it and the light is gone, but I can feel that it is idling a little rough. I cannot feel any mis above idle.
In the life of the truck (190,000), I think I am around 16 COPs being replaced. The first one went out around 700 miles. I am not sure what numbers, but #2 and #5 seem to be the recurring ones. I have used Motorcraft, Duralast and whatever the O'Reilly brand is. None seem to last.
Early on in the life of the truck, I had to replace the crank position sensor and that helped for a while.
Any ideas on why I am having this reoccurring problem.
Thank you.
Thread Starter
|
Senior Member
Joined: Feb 2001
Posts: 129
Likes: 0
From: Garland, TX
The only time it gets wet really is when it rains. Then it is just the water that splashes up from the road. The outages don't really seem to coincide with any rain storms.
I am putting DI-electric grease on the terminals and the plug connectors. I am also testing the resistance when they die and comparing it to a known good one. The bad ones show an open circuit. The boots don't have any signs of rust or other water signs on them.
I also replaced the spark plugs less than 10k miles ago with Motorcraft plugs.
Something else I just thought of that I have been meaning to mention for a while, in the mornings when I first start the truck, I have been hearing some weird mid to high pitched popping sounds lately. They last until just about the time the temperature gauge starts to move, then go away. Don't know if it is related or not, but maybe worth mentioning.
I am putting DI-electric grease on the terminals and the plug connectors. I am also testing the resistance when they die and comparing it to a known good one. The bad ones show an open circuit. The boots don't have any signs of rust or other water signs on them.
I also replaced the spark plugs less than 10k miles ago with Motorcraft plugs.
Something else I just thought of that I have been meaning to mention for a while, in the mornings when I first start the truck, I have been hearing some weird mid to high pitched popping sounds lately. They last until just about the time the temperature gauge starts to move, then go away. Don't know if it is related or not, but maybe worth mentioning.
Last edited by BrianD; Nov 2, 2011 at 12:41 AM.
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
The only time it gets wet really is when it rains. Then it is just the water that splashes up from the road. The outages don't really seem to coincide with any rain storms.
I am putting DI-electric grease on the terminals and the plug connectors. I am also testing the resistance when they die and comparing it to a known good one. The bad ones show an open circuit. The boots don't have any signs of rust or other water signs on them.
I also replaced the spark plugs less than 10k miles ago with Motorcraft plugs.
Something else I just thought of that I have been meaning to mention for a while, in the mornings when I first start the truck, I have been hearing some weird mid to high pitched popping sounds lately. They last until just about the time the temperature gauge starts to move, then go away. Don't know if it is related or not, but maybe worth mentioning.
I am putting DI-electric grease on the terminals and the plug connectors. I am also testing the resistance when they die and comparing it to a known good one. The bad ones show an open circuit. The boots don't have any signs of rust or other water signs on them.
I also replaced the spark plugs less than 10k miles ago with Motorcraft plugs.
Something else I just thought of that I have been meaning to mention for a while, in the mornings when I first start the truck, I have been hearing some weird mid to high pitched popping sounds lately. They last until just about the time the temperature gauge starts to move, then go away. Don't know if it is related or not, but maybe worth mentioning.
The most common area in the harness that has to do with the ignition is above the AC accumulator. The harness sinks down making the connection and wires eventually bare,chaff, creating ignition havoc.