Hello, I've been reading the forums here for a while now, but first time posting here.

I have a new to me 2002 XLT SuperCab with the 4.6L motor. I drove fine for a few weeks when I first bought it, but then one day it started mis-firing while driving around and I got a CIL. I went to AutoZone and had the codes pulled, it was reading a P0306 (misfire #6), and P0316 (crank sensor condition according to what was printed out at AutoZone, or mis under 1000rpm as I understand it). The misfire seems to come and go depending on how damp it is outside.

I have gone ahead and purchased a set of Global Automotive COPs from ebay which arrived today (on a Sunday no less). I haven't purchased new spark plugs yet but that's in my plan.

I want to replace all the plugs/COPs, but I'm wondering if it would be alright to just replace the plug/COP for the #6 cylinder now, and do the rest come spring. It looks like a full change will take some time (since I'm a noob at it on this motor), and the cold Canadian winter makes this job sound less desirable than it would be in warmer weather.

Opinions?

Thanks,

 

If you are going to replace all of your plugs, you will have the cop's out anyway. I would test the old ones and keep the ones that test good for future replacements.

 

I do want to change all the plugs and COP's eventually, and will be keeping the 7 COPs that still seem ok incase I need them.

What I wanted to know is if it would be a problem if I just changed out the bad COP and plug now to try and get rid of the misfire, and then change out the other 7 in 4 or 5 months when it's a little warmer out. The truck is not a daily driver, so I won't be putting too many km's on it before spring.

 

That will be fine, but when you replace the other seven cop's, replace all 8 plugs, even the one you replaced earlier.

 

I changed out the #6 plug and COP today, figured I'd take advantage of the -2°C temperature and snow free skies and get it done. WOW!! What a difference.

I spent about $3.16 on the plug from the dealer, and installed one of the Global Automotive COP's that I order from eBay. The whole process took me about and hour and a half from gathering my tools to cleaning up. It wasn't as bad as I thought it would be. I think I could have had it done in less than 30 minutes if I wasn't coming inside to warm up so much, and working on a sheet of ice in the driveway.

Looking forward to spring so I can take a day and do a full tuneup without the parka and ice.

 

happy to hear it worked out!! Let us know how it goes when you do the full tune. I'm sure it is very nice to have your truck running right again.