now its #7 missfire....????
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Freshman User
Joined: Dec 2006
Posts: 34
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now its #7 missfire....????
I posted last week about my truck having a shutter and you guys nailed it! The number 9 was a misfire. I pick the the truck up on Friday and drive it for all of 2 hours and the same issue starts to happen. I took it back this morning and now #7 is miss-firing!? Is this common? Considering it was about $280 to fix, can I do this myself?. Is there a step by step guide either on this site or elsewhere? If I'm looking at the motor how do I know which one is #7...any help you guys can give me would be great! Thanks again.
Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
I wouldn't say that it's common, but maybe a problem stemming from the age of the boots allowing the spark to go to ground and then causing the COP to fail. You never know...
I would think it's time to change all the boots (unless you've done this already during your last plug change). That's always a good thing to do first.
And, yes, you can do it yourself. Pretty easy to change the COP and boot. The COPs can cost anywhere from $28.00 to $50.00 each depending on the parts store. The boots cost from $7.00 to $12.00 each.
When you get time, do a search here in the V10 forum and take a look at all the threads. Lots of good reading there.
I would think it's time to change all the boots (unless you've done this already during your last plug change). That's always a good thing to do first.
And, yes, you can do it yourself. Pretty easy to change the COP and boot. The COPs can cost anywhere from $28.00 to $50.00 each depending on the parts store. The boots cost from $7.00 to $12.00 each.
When you get time, do a search here in the V10 forum and take a look at all the threads. Lots of good reading there.
Senior User
Joined: Sep 2007
Posts: 445
Likes: 6
From: Montoursville, PA
On my truck, 8 of the coils were reported to be bad when I bought it about 3 months back. The truck had 90k on it when I bought it, and it's a 2000. So, I would suggest just changing the remaining COPs. In some cases it's just the boots and that saves you money, but the COPs themselves do start going bad and need replacements after a certain amount of time. If you change the boots and it turns out it's the COPs, then you doing the job twice (more $$$ for labor) and paying for two sets of parts (the COPs come with boots).
Changing them yourself is definitely doable. Remove old ones, put new ones in. While you're at it, check all your plugs for proper torque and change them if you're at about 100k.
Changing them yourself is definitely doable. Remove old ones, put new ones in. While you're at it, check all your plugs for proper torque and change them if you're at about 100k.
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Freshman User
Joined: Dec 2006
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Which one is #7
If I'm looking at the motor, which is #7. What would be the best keyword for a search on this site about this topic? Would you guys recomend that I change them all? My truck is an 01 F350 with 82,000 miles.
Junior User
Joined: Dec 2005
Posts: 56
Likes: 2
From: west of Cleveland Oh
#7 is the second back on the driver's side. I just replaced that one on mine Saturday. I would recommend that you buy a good OBDII tester. They are available at most parts stores. I bought one from Advanced Auto for $138.00. That may sound like a lot, but considering the wasted money of replacing parts that aren't bad, its cheap. All you do is follow the directions and decipher the codes. The tester I bought has a freeze frame mode, meaning you can read fuel and voltage values at the time of mis fire. That helps a lot. Last year I replaced two COPS just because of defective plugs. If you haven't read it, DON'T use anything but Motorcraft! Use anti-seize and torque them properly! Mine has 148K I'm on my 2nd set of plugs (not counting orig) and thank God I haven't lost one yet! Do your homework and research these Forums THEY ARE SUPER INFORMATIVE! GOOD LUCK!
Junior User
Joined: Dec 2005
Posts: 56
Likes: 2
From: west of Cleveland Oh
30ft lbs. Look at plug for obvious cracks. If you're a smoker, put some ashes on your fingers and wipe it around the porcelain, this will show a crack quick! Also inspect the boot. Look for abnormal black, white or grey marks. Sometimes there are tell tale marks on the underside of the Cop. At least #7 is the easy to get at. By the way, most of us change our plugs around 60k - that 100k recommendation is BS as far as I'm concerned!
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Lead Driver
Joined: Sep 2003
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From: Albuquerque
Originally Posted by AKtruck
I have been doing some reading, there is a lot of info...what would be the proper torque for my 01?
If I'm looking at the motor, which is #7?
If I'm looking at the motor, which is #7?
FORD recommends 14 ft/lbs or 168 in/lbs for the spark plugs.Passenger side (front to back): 1,2,3,4,5
Driver side (front to back): 6,7,8,9,10
Good luck...
biz
Last edited by biz4two; Dec 3, 2007 at 10:46 PM. Reason: misspelled
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