COP Tester
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Elder User
Joined: Mar 2006
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From: Bellville TX. Wof Houston
COP Tester
anyone know of a GOOD COP TESTER.........
Cant seem to find anyone who knows how to do it. or what to use.
I've seen the ones that check for spark. But like a multimeter they wont check for Shorts...
Truck really running like CRAP. I suspect it's a COP.
she's a 2000 model V10 SD with 200,000 on her. I changed plugs at 100,000 But it really didn't need em them.
I just really haven't done anything to the truck.....
Have a low and high idle mis. through mid range also.
I checked for spark jump, belive it or not, all still looks good under the hood.
it's either spark or fuel.
anything ya can think of that maybe I missed.
I did replace fuel filter about 3 yrs ago.
thanks
Cant seem to find anyone who knows how to do it. or what to use.
I've seen the ones that check for spark. But like a multimeter they wont check for Shorts...
Truck really running like CRAP. I suspect it's a COP.
she's a 2000 model V10 SD with 200,000 on her. I changed plugs at 100,000 But it really didn't need em them.
I just really haven't done anything to the truck.....
Have a low and high idle mis. through mid range also.
I checked for spark jump, belive it or not, all still looks good under the hood.
it's either spark or fuel.
anything ya can think of that maybe I missed.
I did replace fuel filter about 3 yrs ago.
thanks
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
You already have a COP tester, the PCM.
Pull the individual cylinder misfire counts (Mode $06, PID$53, TID$01-0a).
It is fairly common for COPs to fail such that they only misfire when under load and work okay the rest of the time.
Pull the individual cylinder misfire counts (Mode $06, PID$53, TID$01-0a).
It is fairly common for COPs to fail such that they only misfire when under load and work okay the rest of the time.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
Are you sure about that, I always thought they work or they don't at all. Plugs and boots can break down under load but I don't think the cops do. Cops have no wearing parts and the old single coils were either good or bad.
Lead Driver
Joined: Mar 2013
Posts: 7,460
Likes: 85
From: Kent Station, WA
Project SHO is right. The COP's change state when going from idle to under a load.
In order to test the Coil Over Plugs failure a live scanner is needed. Even though your not throwing codes go to a local autoparts store and see if any codes are stored.
As for the OP though I would check several things. PCV valve and Hose connecting to the throttle body. These are know to crack and cause lean issues. Fuel Filter, Has it ever been changed? your at 200k, Clean the MAF sensor, use the MAF spray.
If it ends up a cop is bad only replace with motorcraft. My truck has 9 originals at 140k. You can either buy them on amazon or Rock auto, but search around there are good deals out there.
In order to test the Coil Over Plugs failure a live scanner is needed. Even though your not throwing codes go to a local autoparts store and see if any codes are stored.
As for the OP though I would check several things. PCV valve and Hose connecting to the throttle body. These are know to crack and cause lean issues. Fuel Filter, Has it ever been changed? your at 200k, Clean the MAF sensor, use the MAF spray.
If it ends up a cop is bad only replace with motorcraft. My truck has 9 originals at 140k. You can either buy them on amazon or Rock auto, but search around there are good deals out there.
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Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
Are you sure about that, I always thought they work or they don't at all.
Coils can fail internally such that, when put under stress by certain load conditions, the insulation breaks down and the coil arcs internally causing a low output and a subsequent misfire. It's very common based on all the posts here about mild misfires or misfires only under certain engine load conditions. I've had my own share of them on my trucks.
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Elder User
Joined: Mar 2006
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From: Bellville TX. Wof Houston
[QUOTE=Bently_Coop;14380876]Project SHO is right. The COP's change state when going from idle to under a load.
In order to test the Coil Over Plugs failure a live scanner is needed. Even though your not throwing codes go to a local autoparts store and see if any codes are stored.
As for the OP though I would check several things. PCV valve and Hose connecting to the throttle body. These are know to crack and cause lean issues. Fuel Filter, Has it ever been changed? your at 200k, Clean the MAF sensor, use the MAF spray.
If it ends up a cop is bad only replace with motorcraft. My truck has 9 originals at 140k. You can either buy them on amazon or Rock auto, but search around there are good deals out there.[/QUO
Yes Thx. I did the MAF thing. Looked good cleaned it VERY well. never had an issue there. Have NOT looked at the PVC/TB Really leaning towards the Cop I have a cheap code checker nothing. there.
read a lot about this issue. the ole misfire/ shaking under load. going to replace plugs again. Like you. I believe in Quality like motor craft cops.
thanks for input
In order to test the Coil Over Plugs failure a live scanner is needed. Even though your not throwing codes go to a local autoparts store and see if any codes are stored.
As for the OP though I would check several things. PCV valve and Hose connecting to the throttle body. These are know to crack and cause lean issues. Fuel Filter, Has it ever been changed? your at 200k, Clean the MAF sensor, use the MAF spray.
If it ends up a cop is bad only replace with motorcraft. My truck has 9 originals at 140k. You can either buy them on amazon or Rock auto, but search around there are good deals out there.[/QUO
Yes Thx. I did the MAF thing. Looked good cleaned it VERY well. never had an issue there. Have NOT looked at the PVC/TB Really leaning towards the Cop I have a cheap code checker nothing. there.
read a lot about this issue. the ole misfire/ shaking under load. going to replace plugs again. Like you. I believe in Quality like motor craft cops.
thanks for input
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
Go read this thread: https://www.ford-trucks.com/forums/1...bd1-obdll.html
Down around post #35 or so, I showed how I figured it out using two different tools.
FWIW, I've used the $15 COPs from RockAuto and the ones from the local OReilly's store when I didn't have time to wait. All worked well.
I would not simply change the spark plugs hoping to solve the misfire. They are only rarely caused by the plug itself. If you're going to do a general tuneup, replace the boots and springs along with the plugs. Don't be surprised if you still have the misfire due to an undiagnosed and defective COP.
Down around post #35 or so, I showed how I figured it out using two different tools.
FWIW, I've used the $15 COPs from RockAuto and the ones from the local OReilly's store when I didn't have time to wait. All worked well.
I would not simply change the spark plugs hoping to solve the misfire. They are only rarely caused by the plug itself. If you're going to do a general tuneup, replace the boots and springs along with the plugs. Don't be surprised if you still have the misfire due to an undiagnosed and defective COP.
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Elder User
Joined: Mar 2006
Posts: 588
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From: Bellville TX. Wof Houston
Yes Thanks. this is the post I read last night.
lead me to believe, it's a COP...
I was going to do a Gen tune up.
may be bighting off more than can chew.......
thanks again
lead me to believe, it's a COP...
I was going to do a Gen tune up.
may be bighting off more than can chew.......
thanks again
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