Spark plug PSA

Whos offended? I'm just wondering if they were loose from the factory or loosening overtime.

 

I'm sorry. Did I say you or I was offended? I said you might be right. I do apologize if I came off different then how I wanted to. That's the problem with text. I honestly don't know the answer to your question. I am only reporting the issue I encountered to help others. I'm not the first to bring this up though.

 

Looking at the pics

What do you think? I think they all look the same. Are they crushed appropriately I don't know. I guess I could take and easy one out on the passenger side to compare. That's really the only way to answer your question.

 

“Screws fall out all the time, the world is an imperfect place”. - John Bender
Now I’m checking mine this weekend. Maybe the spark plug monkey was off his game that day.

 

It happens

You found it

Sounds like these latest ones are snug, I wouldn't worry about it

 

Thanks for the heads up! I’ve been kind of going over everything preventative wise, I’ll be sure to check on mine.

 

I have still have a rough idle when fully warmed up. I need to check the rest of my plugs, been in the shop three times now for three coils replaced, a Plenum replacement and also a loose plug.

What is the torque on the plugs? 13ft lbs? I want to pop the hood today and just check all of them myself.

 

13 ft/lbs

 

Hey OP, what were the original symptoms that led you to check the plugs? Just a miss at cruising? I've always had a surge/shudder around 50-55 mph that's intermittent. Not constant enough to call a vibration. Significantly worse on hotter days, A/C on full blast, or the truck is warmed up. But it never misfires bad enough to throw a code. And I only have 20k miles on the clock.

Edit: Yes I know you gave a quick highlight reel to start the thread but I was hoping you could elaborate on the problems! Thanks

 

Ever since I had the truck it wasn't very smooth while cruising. I had a slight sputter while cruising most noticeable at RPMs lower than 2000 RPMs. No codes ever thrown. Seemed to run fine when accelerating and towing. I've always had the surge, as you described, when accelerating from 15 to 35 MPH. I believe that's the crappy transmission shift points. The tunes I applied minimized to practically eliminated that. I have the Nexus tune which I highly recommend.

I just think it might be in people's better interest to pull the coils on the passenger side just to do an initial check. Takes about 10 minutes.

 

They are only designed to torque once. If you take them out to check them. They will not seal again (as the washers are now crushed).

 

Not true

https://www.denso.com/global/en/pro...vice-parts-and-accessories/plug/basic/torque/

 

@vols_and_tacos Mine does the same thing. 23k miles. i just check my plugs today and they were all tight, replaced them anyway since i was in there. still have the misfire issue. Mine is tuned also. Drives me nuts.

 

I see 6 Denso plugs. Doesn't Toyota still use 3 Denso and 3 NGK like they did on the 2nd gens? If they still do, that means someone changed the plugs after the factory did.

 

they are all Denso plugs in the 3rd gen. Just had mine out today

 

Did mine yesterday. I have 20K miles and pulled a few out. They looked still fairly new but I replaced them. Never had an issue before, I run 93 octane, KDMAX Pro tune and plugs looked great. Anyhow I used new OEM plugs, drives and feels no different than before. Mine runs and drives perfect but I wanted to be sure. I have a JLT catch can I have been running for a few years so maybe a catch can helps!

 

Wow 20K and no issues and you still changed the plugs? As long as you have piece of mind now, it's all good.

Really I only wanted people who think they might have an issue I had to take out their coilpacks and look for staining. If all is good and plugs aren't due for changing then put it back together and keep on rollin'!

 

I might grab a beer and go check mine... Ill just inspect the coil pack and retorque the plugs.. not really into pulling the plugs

 

If the coils are clean no need to remove the plugs

I only replaced mine because I was wasn’t too far from 60k

 

yea, I have 5500miles on the truck.. Figure it gets me out of the house, puts a beer in hand and just double checks