Hey Guys,

Over the weekend I fixed an ongoing issue I had with the truck ticking. I discovered that when I got my plugs changed last year either they didn't tighten them back down to the require 25ft lbs or they had come loose. The back two spark plugs on each side were extremely loose. I loosened all of them and tightened all of them back down to the recommended 25ft. lbs.
About a day or so after doing this I started noticing that the truck at around 50ish mph when it kicks in to OD that the truck starts bucking like crazy. I have checked the electrical connections on the COPs, retuned the truck and cleaned the MAF and changed the oil and ran Lucas through the fuel system. At this point I am kind of stumped. My only two remaining thoughts could be that those back spark plugs could be damaged and I am just now seeing the effects of it now that everything is back to like it should be. OR I have a COP that is going bad. The crazy thing is that I have no codes at all coming up. Any of you have experience with this?

Thanks

 

Lots of views...any input?

 

Maybe the plugs got damaged or fouled... try new plugs..

 

For what it's worth...

My 05 would buck/jerk when shifting into overdrive...thought it was a transmission problem...turned out to be a bad COP on #3 cylinder...

Had # 8 go out shortly after...did the same thing...never gave a code when #3 went...took the dealer several weeks to figure it out...I was able to force a code when #8 was going (real harsh test drive)...

Regards!

 

Welp I finally got it to throw a code P0304....cant really find much for just that single code

 

cylinder #4 misfire

 

#4 is back on the passenger side. more than likely the coil going bad, especially if a plug had an issue

 

Replaced the spark plugs for #4 and #8 today...apparently when they "changed" the plugs last year they didnt change those and yes now it runs great and has 0 bucking or sputtering issues.

 

Was going to say COP somewhere, but they didn't change the furthest ones? That's lousy.