Very well then!

 

What torque did you tighten those plugs to?

 

Everyone here has been saying 25 ft lbs, so that is what I did. I have lots of threads in though, but did not take the time to count the turns. They came out easy. One I only needed 1 finger on the 1/2 inch ratchet to start it out.

 

That sounds good, others may opine also. I was just concerned for you because a lot of the plug blowouts seem to occur down the road after a plug change. I mean way down the road like 50,000 miles. In my trucks case the original owner had the plugs changed at 110000 miles, and a blowout occurred somewhere between 150k and 200k miles. Your truck being a 2004 should have the long thread heads.

 

A shoutout to Sammie for her tutorial. Though mine was not as bad as what she went through, it was nice to see it all before I started. And thanks to everyone else going way back for the suggestions and help. I only bought 1 coil instead of all 10, and saved about $300.

 

Excellent! I had that shudder when the TC locks up with a bad coil!

 

I am having the exact same issue on a 2002 v10. I bought two new coils, and moved them around looking for a bad one and never found it.

Then I went after the plugs. This Ex previously blew out numbers 3 & 4, so I stayed away from them. I avoided them for two reasons: I know they significantly less miles on them than the others, and it scares the hell out of me thinking about those inserts coming out. The 8 plugs I replaced all looked like the pictures above. They were all originals. Unfortunately, it did not correct the misfire.

Then I borrowed a scanner. It says misfire on cylinder 4. Shoot... That plug doesn't have 10k miles on it! Hoping it wasn't the plug, I replaced the connector. No change. I'm going to troubleshoot the no. 4 injector before I pull that plug. And if anyone is wondering, I could have removed those plugs without using the ratchet. They were that loose. I went back with 120 in-lbs (10 ft lbs). That's the very bottom of the range I found.

But here's the interesting part... The scanner shows I have only one O2 sensor - bank 1. I even tried another scanner. It says the same thing. I thought BS, so I crawled under the vehicle, and sure enough, there is one on each side. Duh.

Has anyone else experienced a scan where one O2 sensor is reading zero volts, but doesn't throw a code?

Any and all help is much appreciated.

 

You have an '02 (with the short plug threads) with a history of two blown plugs and you installed new plugs at 10 ft/lbs of torque? Are you hoping to blow more plugs? Conventional wisdom around here places much of the blame for blown plugs on the very low factory torque spec of 11 ft/ lbs and you went with even less......... Many owners here have upped the torque on those early heads to 25 to 28 ft/lbs with very good reliability and very, very few blown plugs. Junkyard testing showed that the plugs break around 110 ft/lbs but those four thread plug holes remained intact, 28 ft/lbs is plenty safe for those heads. Also decreasing the change cycle to 50K miles or so also seems to improve the reliability some.
What type of inserts were used on the two previously blown plugs? The proper inserts installed correctly are a permanent fix and should not pose any issue with changing those plugs. An improper insert, like a helicoil will not offer that level of serviceability or reliability.

 

I won't go into a long story, but my original engine ended up with a dead cylinder on the plug that had been repaired improperly. It's a good idea to make sure the injector is good, but you may want check compression in that cylinder also. Exactly what code are you getting?