My truck has 56.5K on it and might as well change the spark plugs before the 30,000mi interval. I 've replaced the stock denso's with the Bosch's Platinum +4 spark plugs, which doesn't need gapping. The install was pretty easy and quick, in over an hour. What surprised me before the install (just in case I need special tools) is how deep the spark plug is. I used a 12" extender to reach the spark plugs.

Just curious, why did you go with bosch?

deleted by poster!

I would have stayed with some average NGK's.. Hey wirelessf,, thank you for the tip on the DRL. Worked like a charm. 2 min and done!!!

Having used the +4's before I wouldn't mount them in a lawnmower or anything else that I cared about.

Hell there was a post just last week about a guy who had a monster vibration that ended up being a failed plug...........Bosch Plat (+ 4's I think) were the culprits.

Here it is: http://www.tundrasolutions.com/forums/1gen-tundra/115964-at-50mph-violent-frontend-shaking-trans/

Do a search and the general consensus is BOSCH Plug are one of the worst.
Having seen them in TOYOTAS over the last (ALOT) years, I AGREE, they suck. They cause misses, hesitations, excessive fuel MPG drop ect......... I have even seen them melt coil packs in camry's/tacoma's/sienna's/tundra's and sequoia's.
I would advise to go back to Denso or NGK as soon as possible.

That was my truck that was was misfiriing with bosch. They had my traking shaking so bad that i thought my transmission was gonna fall out. I switched back to denso and everything is back to normal. I will never put a german spark plug in a japanese engine again

I ran +4's in my silverado with the 5.3 and it started running like crap right afterwards. I pulled them out and put in champion plats and it smoothed right out. I will never run a bosch plug ever again. If I still own this truck when it's time to replace the plugs I'll get replacement iridiums like are already in there. I plan to put iridium in everything I drive if it doesn't already have them from the factory. At least toyota installed them on the vvt-i engines at the factory.

I just bought the Bosch platinum +4's the other day and I was going to install them tomorrow. After reading this, I may take them back and get Denso's or NGK's. I thought I read somewhere that people loved the Bosch's. O'well, at least I didn't install them yet.

Champions are just as bad in a Toyota, they belong in Chryslers/lawnmowers and Harleys and Evinrude outboard engines.

DENSO or NGK

Champions also belong in Evinrude outboard engines.

I run NGK's in everything I own except the above mentioned engine.




Champions are just as bad in a Toyota, they belong in Chryslers/lawnmowers and Harleys

DENSO or NGK

I just bought the Bosch platinum +4's the other day and I was going to install them tomorrow. After reading this, I may take them back and get Denso's or NGK's. I thought I read somewhere that people loved the Bosch's. O'well, at least I didn't install them yet.

Take em back and trade them in for NGK's and take the difference in cash and buy a couple of cases of beer.

RE

Champions also belong in Evinrude outboard engines.

I run NGK's in everything I own except the above mentioned engine.
See, I learned something today :tu:

:ts::D

Is a good day. :D



See, I learned something today :tu:

:ts::D

Well I did order the spark plugs over the internet, and knowing nothing about what kinds to use or what brand, I thought I'd go with german enginnered brands (ie bilstien, bosch, etc). I still never noticed any problems.
Now that you guys told me, I'm gonna order NGK Iridiums IX spark plugs. Before I hit the order button, tell me if these spark plugs are good.


That was my truck that was was misfiriing with bosch. They had my traking shaking so bad that i thought my transmission was gonna fall out. I switched back to denso and everything is back to normal. I will never put a german spark plug in a japanese engine again

Did you get a check engine light?

Now that you guys told me, I'm gonna order NGK Iridiums IX spark plugs.That's what I went with. It's only been 50 miles or so but no ill effects.

No i didnt get a check engine light. I didnt even know there was anything wrong with the plugs until i had the vehicle for about 4months(i bought it used). All of a sudden i started having problems that felt like transmission problems. As soon as i changed the plugs it was all better. I would not have believed the plugs could cause that kind of problems if it had not happened to me. I used the copper denso, but only because i was told the earlier model tundras like em better. I dont know if theres any truth to that! Good luck

Well, after reading this posts and searching all the other ones about bosch plugs, I took the platinum +4's back and got NGK Iridium IX's. I just put them in and the truck is running good on the first test run. The plugs I replaced were Champion RC12PYP. I felt a noticable difference.

On a side note my RPM was very low last week to the point where the engine shut down when I came to a stop. After reading some other posts in this forum, I cleaned out the throttle body (which was filthy), changed the air filter, and changed out the plugs. RPM's are up and the my truck is running great. I may clean out the MAF, but I would rather not touch it if I don't have to.

Well, after reading this posts and searching all the other ones about bosch plugs, I took the platinum +4's back and got NGK Iridium IX's. I just put them in and the truck is running good on the first test run. The plugs I replaced were Champion RC12PYP. I felt a noticable difference.

On a side note my RPM was very low last week to the point where the engine shut down when I came to a stop. After reading some other posts in this forum, I cleaned out the throttle body (which was filthy), changed the air filter, and changed out the plugs. RPM's are up and the my truck is running great. I may clean out the MAF, but I would rather not touch it if I don't have to.

You have done well, young grasshopper. Now, go forth and drive the crap out of it. :)
RE

Alright, another newbie question -

How does one clean out the throttle body???

My 04 DC has 48,000 miles on it and I figured I might as well replace the plugs, as the electrodes were starting to look a bit worn. I went down to the nearby Auto Zone with the intention of purchasing eight Bosch platinum four electrode style plugs. (Hey the idea of four electrodes seems to be a good one)

The guy working the counter said, "Don't do it! I've worked here three years and in that time period I have personally seen three cases where the center electrode broke off, fell into the cylinder, and caused engine damage."

I said thanks and bought eight NGK Iridium IX's. I know NGK makes a good product and the counter guy said the Iridium IX's are supposed to be a great spark plug. :tu:

Alright, another newbie question -

How does one clean out the throttle body???

Using throttle body cleaner and a rag also some minor tools it is not real hard to do I do it at each oil change. For details it has been talked about before in here or you could just pm me and I could explain in more detail.
Kevin

Thanks for the offer Kevin -

I did find enough material here and elsewhere that I can take it from here. Appears I should address the MAF while I'm at it too.

Thank you!

Bosch platnium +4 caused intermitant CIL indicating the right catalytic was malfunctioning...... the CIL would come on for no apparent reason, and then go off again on it's own if I didn't get around to resetting it... sometimes 10k miles between, sometimes a few hundred. I figured it was an O2 sensor that was flakey but since the gas mileage was ok and it ran fine I never fixed it... since changing back to NGK plugs 20k miles ago, no CIL.

Robert

Bosch platnium +4 caused intermitant CIL indicating the right catalytic was malfunctioning...... Umm, what's "CIL?" :confused:

Umm, what's "CIL?" :confused:
Check Engine Light

I figured it was from how it was used, but was expecting "CEL."

Thanks Mustang.

Well I trashed the Boschs and went with NGK Iridums IX's. At least I can sleep better now and not worrying about burning anything.

Well I trashed the Boschs and went with NGK Iridums IX's. At least I can sleep better now and not worrying about burning anything.

Well, good. Now I feel better also. :)
How are things in Waipahu? Is the Waipahu Inn (small beer joint) still there in the small strip mall?
Had some good times there............was thrown out on my *** at least three times during my tour. http://i58.photobucket.com/albums/g240/Parasympathic/PurpleHaze.gif

For a short while, I lived in the apartments right next to there. Didn't have to drive home.... I could just walk or crawl. http://i58.photobucket.com/albums/g240/Parasympathic/helmut.gif

I just had a flash-back. Does that make me a drugie?
I wonder if I could get disability, hmmmmm.

Well, good. Now I feel better also. :)
How are things in Waipahu? Is the Waipahu Inn (small beer joint) still there in the small strip mall?
Had some good times there............was thrown out on my *** at least three times during my tour. http://i58.photobucket.com/albums/g240/Parasympathic/PurpleHaze.gif

For a short while, I lived in the apartments right next to there. Didn't have to drive home.... I could just walk or crawl. http://i58.photobucket.com/albums/g240/Parasympathic/helmut.gif

I just had a flash-back. Does that make me a drugie?
I wonder if I could get disability, hmmmmm.

Things in Waipahu are fine. I've never been there before and I dunno if it's there or not. But there are a lot of major changes in Waipahu though. The ol Sugar plantation building w/ the smokestack has been turned into a YMCA, the ol Big Way has been turned into a market place and new warehouses are being built on where most of the sugar plantation buildings used to be.

Champions are just as bad in a Toyota, they belong in Chryslers/lawnmowers and Harleys and Evinrude outboard engines.

DENSO or NGK


LOL! I know Champions are the stock Harley plugs, but I'd never put them in there. NGK Iridiums only.

I put the Bosch 4+ in my Tacoma and had to take them back out after about 500 miles. I had thought I messed up one of the wires,or failed to get a spark plug connector on tight.

Champion spark plugs have ALWAYS been junk. I started in the auto repair business in the late 60's and they were a cheap plug then.