2012 v6 at DCSB engine knocking @ 1500 rpm

I believe all engines are built in Japan.

 

who knows.. i know the FJ's where built in 2 different plants.. hence one cylinder head having NGk and the other side having denso spark plugs lol

 

i just figured it had to be dirty.. which is wasnt that bad... I put in a tank of 89 and i hear the knock occasionally. seems like the 93 octane completely kills the noise.. and the truck runs smoother.. however is an extra $15 a tank i may as well go a buy a supercharger now

also FWIW i am at sea level.

 

We don't have 93 anywhere around here.. stuck with 91. Gonna run Shell 91 and see if it changes anything. Wonder if I should disconnect the battery for 10-15 minutes and let it relearn on Shell 91 if that'll fix anything. I checked the MAF and its clean so I doubt it's that on my end. This 30k truck is a pain in the ass

 

My 2013 was pinging like as well. It was driving me nuts. I replaced the plugs with ND Iridium and it has not pinged yet. Cheap fix! Try it, I promise it works. Very simple reason why. The stock plugs are not creating a hot enough spark to burn all the fuel in the cylinder. The Iridium plug is a much more efficient plug.

 

Toyota has a 50/50 supply on the plug vendors. This is the easiest way to obtain it. The plugs are installed by machinery, one side of the line is loaded with NGK, the other with Denso.

 

Hum let's see if it's not burning all the fuel the cylinder temperature would be lower, hence it would be even less likely to ping. But I’m sure you had your gas analyzer hooked up and found the HC to be high and that’s how you found all the unburnt fuel but never bothered to find out why it was high. I guess it's back to the drawing table for Toyota to find out why their trucks are flunking emission testing.

 

Figured I would share my recent happenings...I have been on my rear end due to surgery . Truck (2012 4.0) sat for 7 days . I got to drive again this past Wed. My truck was raising hell under the hood . Sound like ya dropped a handful of BB's in there.
Pinging like hell? ? Never ever heard it or felt it do it before. I filled her up with 87 and put some Lucas in her. Guess we will see.

 

The place or assembly line your Tacoma was built is listed on one of the stickers located in the door jam of the drivers side door. I would believe the Tacoma engines are assembled in the same plant as the truck. I have read the Tacoma is manufactured in Baja, San Antonio and Japan. Just interested to see if any/every one with the engine knock has a Tacoma from the same or different assembly line.

 

i think mine was mexico??

 

I said earlier that the engines are built in Japan, I believe I'm wrong. But I have read that Tacoma v6's are built in Alabama. Here is a quick link that states the Alabama plant builds the v6 for the Tacoma. http://www.toyota.com/about/our_business/engineering_and_manufacturing/tmmal/

So I don't think the assembly plant where you truck was built has anything to do with the engine in your truck.

 

It's pinging! Not all fuel is what it says it is. Turn on radio and don't worry about it. Seems a lot if you guys drive around listening for things to worry about! Engines make noises! Deal with it

 

Considering my truck has 5K miles on it, I doubt very much I have carbon build up. All I can tell you is that after I switched out the plugs it no longer pings. Are you going to argue the fact that making a change actually helped out from the stock configuration?

My education on how spark knock is produced does not need to be researched. I have been a Master Tech with Toyota since 1986 and Lexus since 2004.

We change plug brands, types etc quite often to get the best results.

 

Are you always a dick, or just on some days?

 

The heat range of a plug is by design it does not matter what type, if you start to screw around with different heat ranges you are inviting problems. If it calls for a certain heat range the plug is designed to accomplish that it matters not what the electrode is made of. Compression ignition is caused by high cylinder temps as is NOx this is one of the reasons they added EGR's back in the late 60's to reduce cylinder temps. If you have persistent spark knock yes a higher octane will help because it's harder to light but the tradeoff is less heat value per pound. Carbon in modern engines is pretty much a thing of the past they have become far more efficient at burning fuel.

 

Fuel quality is very poor these days! I know on my old street bike I've put premium in and it pinged so much it was ridiculous! But there is nothing wrong with the engine, it's the fuel. Newer vehicles have safeguards against this but it can only do so much. At 1500 rpm most likely Trans has shifted to overdrive, very high load on the engine and I'm sure it could ping some, my point is how do you expect a dealership to repair this? If they start replacing parts there is more likelihood of them screwing something up when really there is nothing wrong!

 

Have u all trued e3 plugs. I havebthem in my 2007 & 2011

 

I have been following these posts for almost a year now since I bought my brand new 2012 Tacoma last year with only 5 miles on it. I did take it in for service and every time complaining to the service manager about the noise. I finally had to go speak with the general manager about taking my complaint to the next level. Within 3 days the service manager called me directly and told me that Toyota is aware of the problem and its a problem with the software controlling the timing. Supposedly Toyota is working on a fix to flash the onboard computer and install an updated software version that will correct the problem. According to the service manager, I'm first on the list when the fix comes out. My two sents.