COP's which brand

Messages
3,319
Location
Kansas, USA
Thread starter
Had a misfire on our 04 Escape 3.0 v6 last night, I want to say sudden but I think it's been happening but no codes. The CEL pointed to #6, looking at it the plug had backed out 2-3 turns. The plugs only have 9k on them and I know they were tightened properly. The plug next to it was loose 1 turn but the next one over was still tight. The misfire was still there so swapped it out with one of the good factory Motorcrafts. It feels like it still has a miss so will have to check the back ones when the weather allows. The question would be why the plug backed out and is that what caused the bad COP or did the bad COP cause the plug to back out? The generic Amazon front COP's have about 29k on them, the back ones have 9k when I changed all the plugs. I know most will say Motorcraft COP's but how about Denso or NGK COP's? Any experience with those brands in Ford vehicles?
 
Messages
4,703
Location
Lakeville, MN
You are right you are going to hear Motorcraft only. That's my advice. I've gone down the road of non Motorcraft COP's, and run into failures with 1/3rd to 1/2 the mileage. I've always been able to source Motorcraft COP's at reasonable prices with some careful shopping. Stacking some offers at Advance often did the trick.
 
Messages
15,226
Location
N.H, U.S.A.
I had a gasketed plug back out once on a subaru 1.8. If it backed out, you didn't get it torqued correctly. Somtimes you get socket bind in the head counterbore, others don't account for major torque loss.through a u-joint if at a slight angle and - NO anti-seize!
 
Messages
675
Location
GA
On Rockauto, the Denso is quite a bit less expensive than the Motorcraft. For this application, Denso is the OE manufacturer of that particular ignition coil. Buy Denso with confidence. One other note: From the partstech site (which is correct most of the time), Motorcraft and Denso are showing as made in USA. The NGK coils are made in Mexico.
 
Messages
14,201
Location
Central NY
ONLY Motorcraft, which means ONLY Denso. I don't know what it is about the early ford COP stuff, but they don't last long on OEM components and even less long on the non-OEM stuff. I bought 8 Denso coils for my F350 from Rockauto. When they came in, I peeled the Denso sticker off and they actually have Motorcraft and the Motorcraft PN printed into the top of them.
 
Messages
11,363
Location
Illinois
I would spend the money on the back ones. When I did my daughter's 2005 (or 06) Escape with the 3.0, we bought three new coils for the back bank as the intake comes off. Buy what you want for the front, or re-use good, old coils as they are simple to replace. Since I was spending her money and my time, good coils and plugs in the back. Good new plugs and the existing coils up front. It's a long hour to get the intake off to get to the back plugs, so you probably only want to do that job once.
Originally Posted by Eric Smith
Had a misfire on our 04 Escape 3.0 v6 last night, I want to say sudden but I think it's been happening but no codes. The CEL pointed to #6, looking at it the plug had backed out 2-3 turns. The plugs only have 9k on them and I know they were tightened properly. The plug next to it was loose 1 turn but the next one over was still tight. The misfire was still there so swapped it out with one of the good factory Motorcrafts. It feels like it still has a miss so will have to check the back ones when the weather allows. The question would be why the plug backed out and is that what caused the bad COP or did the bad COP cause the plug to back out? The generic Amazon front COP's have about 29k on them, the back ones have 9k when I changed all the plugs. I know most will say Motorcraft COP's but how about Denso or NGK COP's? Any experience with those brands in Ford vehicles?
 
Messages
3,319
Location
Kansas, USA
Thread starter
I was leaning towards the Denso's.. a little cheaper than the Motorcrafts but I've had good luck with them in the past. Looks like a good time to get a smaller torque wrench while I'm at it.. I've always torqued plugs down the same and never had a issue but maybe my internal gauge is getting off as I get older!
Originally Posted by javacontour
I would spend the money on the back ones. When I did my daughter's 2005 (or 06) Escape with the 3.0, we bought three new coils for the back bank as the intake comes off. Buy what you want for the front, or re-use good, old coils as they are simple to replace. Since I was spending her money and my time, good coils and plugs in the back. Good new plugs and the existing coils up front. It's a long hour to get the intake off to get to the back plugs, so you probably only want to do that job once.
Good point on just buying the good ones for the back. I would have I think 6 possible good COP's and with the bluetooth OBD reader the fronts are pretty easy. I can remove the intake I think in 10 minutes now lol.. I've did it three times. Just unhook what I have to and lay it to the side.
 
Messages
607
Location
The ATL
The only aftermarket brand I would use if they're made for your model is Accel on Fords. I've had good luck with them. Otherwise stick to Motorcraft.
 
Messages
842
Location
Florida
When I had a 4.6 I went through the cheap coils, ebay and amazon, they were all crap. After a couple years of replacing one here and one there I bought a set of Acell coils. The set of 8 cost me 180 bucks but never had to replace another. The MC are too expesive so if you plan to keep it for a while longer plan on at least a name brand set.
 
Messages
876
Location
Alberta
I'm quite certain Visteon is the manufacturer of Ford's COP products. When did Denso come into play? The dwell time on aftermarket coils (not sure about denso ) tend to be different than OEM specifications, which can cause grief in many small ways. https://www.visteon.com/
 
Messages
4,386
Location
Parts Unknown
When you switched coils, you didn't mention if the CEL still had a #6 misfire or did it follow the suspect coil to another cylinder ? Stick with Motorcraft and replace only the bad one. Why did the plug back out? Incorrectly torqued or the use of anti seize which shouldn't be used.
 
Last edited:
Messages
6,854
Location
California
Motorcraft, Denso, Bosch or Hitachi - I stick to OEM or the OEM supplier for coils. NGK bought out Wells and their coils look like Chinesium, like Standard or chain store stuff. I haven't seen a Ford COP unit - the DIS waste-spark stuff looks like Bosch to me. If the plugs backed off a bit, I'd re-torque them. You don't need too much torque to tighten a tapered-seat plug but did any anti-seize get on the plug seat? I don't think Ford V6s jettison spark plugs like the mod motors can. There is debate about anti-seize, some don't use it - NGK says no need for it with their plating process. Honda requires it, and it's a practice stemming from old school black oxide Autolite/Delco plugs.
 
Last edited:
Messages
659
Location
PR CA, USA
Mod motors blow the plugs out from incorrect torque also. Tighten to upper end of spec and make sure threads are clean and easy to turn before final torque. I use whatever coils. Spectra premium are My latest choice. On modular motors it is moisture that has killed all I have seen.
 
Messages
1,664
Location
Prospect, KY
If money is tight for the Motorcraft COP then go junk yarding and pick the nicest ones you can find. Mine were $10 for 2. For that price you might grab a spare set just in case. A bit of a gamble but one I took and saved over $180 on my Grand Marquis
 
Messages
3,319
Location
Kansas, USA
Thread starter
No anti-seize was used. Motorcraft plugs was used but I need to check if they were finewire.. if so they'll be thrown out and replaced with Autolites of the original design. Price really isn't a issue but the vehicle is 15 years and 170k, we put average of 5k a year but not sure how look we'll keep it. Interesting enough a heat shield decided to loosen up the same time this happen.. I thought something was really wrong lol. No new codes and seems to run good but has some popping through the intake if you rev it quick and let off.
 
Top