V10 COP or Speed Sensor?
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V10 COP or Speed Sensor?
My 02' V10 X is misfiring especially going uphill, feels just like a COP issue, so I have checked at both Autozone and O'Reilly's, both of their code readers say "output speed sensor insufficient input". I went ahead and bought the $20 speed sensor part, what do y'all think? The guy a O'Reilly's said usually if it is a coil issue the reader will show misfire and the cylinder.
TreadLightly
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From: SE Missouri
Senior User
Joined: May 2010
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From: Pocatello, Idaho
Not always, I had a miss I only noticed it going up hill. My truck never threw a code. I ended up replacing 2 coils. Reading on this forum I learned that it could take awhile for a code to show up, and sometime it doesn't show up.
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Without a code reader I guess I am going to have to take it into the mechanic so he can find the faulty COP. That sucks, I was looking forward to replacing it myself. I had all of them replaced last year by a shop, now that I know how to do it myself I thought I would find out what COP and replace it.
Cargo Master
Joined: Jul 2009
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From: Chino, California
You could check one by one. Get a new COP and swap it with an existing one. If you still have the missfire, then you know that the one you pulled was still good, so you put it back and take that new COP on to the second cylinder and repeat until the misfire is gone.
I know it's a PITA, but it's the only way short of replacing all of them.
If it's your plug or injector, then that's another issue and this test would not work.
I know it's a PITA, but it's the only way short of replacing all of them.
If it's your plug or injector, then that's another issue and this test would not work.
FTE Leadership Emeritus
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From: Long Island USA
I don't know why but that speed sensor code rings a bell with me, and that someone had a COP that was misfiring causing a spike in the wiring harness (+12V red wire at the COP) and causing the PCM to throw a speed sensor code.
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Krewat, that would not suprise me, that is why I didn't install the speed sensor so I could take it back in case the COP was causing the issue. Thanks to all that replied, it kept me from wasting $20 and time under the X late last night. I have considered just buying one COP and trying to find out which cylinder it is, but what if two are out? I can take it into my shop and have them check it on thier programmer, it should show up there. I replaced all of the COPs last summer, I'm not too excited about replacing them all again a year later.
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Laughing Gas
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When I had a COP go out on my 02 F250, it lit the Speed Sensor Code. I did not get a missfire code until the COP when completely dead.
This isn't an Island Blue & Silver Crew Cab Lariat Short Bed from Sands in SE PA is it?
I believe it was the #3 or #4 COP (pass side under the heater hose) that went twice in the 75k miles I had the truck.
This isn't an Island Blue & Silver Crew Cab Lariat Short Bed from Sands in SE PA is it?
I believe it was the #3 or #4 COP (pass side under the heater hose) that went twice in the 75k miles I had the truck.
TreadLightly
Joined: Oct 2006
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From: SE Missouri
I have had at least two COP's do the exact same thing with no moisture at all. I do believe that they were all "no name" brand COP's though. Boots still looked brand new. The ones I installed prior to my 4500 mi trip only lasted about 5k mi. Lifetime warranty if I want to send them back to Shanghai. Won't do that again. LOL. So I have a new set of COP's I am testing this time.
Laughing Gas
Joined: Jan 2002
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I found I still had my old records:
54905 28-Dec-06 Replace #4 Coil On Plug (Duralast)
68216 9-Feb-10 Replace OSS and Vehicle Speed Sensor
68250 21-Feb-10 Replace #4 Coil On Plug (Motorcraft)
The boots were not wet either time. Infact, the boos was hard to get seperated from the plug.
54905 28-Dec-06 Replace #4 Coil On Plug (Duralast)
68216 9-Feb-10 Replace OSS and Vehicle Speed Sensor
68250 21-Feb-10 Replace #4 Coil On Plug (Motorcraft)
The boots were not wet either time. Infact, the boos was hard to get seperated from the plug.
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I might have found the problem, I could only get to three today, ran out of time, but the third COP back on the passenger side, when I pulled it out the spring stayed attached to the plug. Came right out of the boot. When I examined the boot, it looked okay, but with the spring loose I am wondering if that was the issue. I figure tomorrow after work I will stop by the auto parts store, pickup a new boot, replace it and see if that does the trick. Maybe I will get lucky. The other two I pulled looked okay, I believe they are all Motorcraft as well. It looks like the other two on that side are going to be very tough to get too.