otherotherbenz

I think that a high boost tunes, need to be paired with racing spark plugs for maximized performance and safety.

I believe, Weistec is currently in development of racing spark plugs and will be released soon.. I will surely install it

xtyper

Agreed.

For those that want to retain all factory hardware with their tune, it's pretty clear to me that a certain boost threshold should not be exceeded. And for those that want a higher boost tune, they just have to be prepared to upgrade their spark plugs, etc to aftermarket alternatives.

otherotherbenz

I actually not 100% sure.. If you want to be safe, just go with racing spark plugs, that should do the job..
Weistec is located near my area, so they are local to me.
I drove to Weistec with my CEL on, the tuner put a revised tune on my car and it repaired the problem..
For the revised tune, I am not sure which boost setting they put, but all I can say is the power on the car feels the same before the misfire happened..

IMHO, its not which tune you go with, the factory spark plugs just can't handle these tunes, get racing spark plugs and it should be fine

Vic55

I had a different experience with my tuner... I got the tune(s)- and drove the living crap out of the cars from digs to high speed runs daily. There was not one day where I didnt get to push over 140 mph (mexican toll roads)....

I run factory plugs. No issues.

drop997stop

so this is the issue, there is no corresponding info except the different tuners where problems are arising.

so I have yet heard of any problems from

OE
Kleeman
Velos

maybe there boost levels are lower or are cars just have different plugs to begin with.

I will be flashing the car back to stock and then taking it in to the dealer and seeing whats going on. Never imagined that I would have so many problems. The fact that I tasted the extra power makes me not want to live without it.



I cant figure it out.

otherotherbenz

Yes Vic, I meant high boost tunes

otherotherbenz

I went the exact same road as you my friend..
Was very very disappointed, but after the retune (revised tune) it solved the problem and now I can enjoy the beast just like how it was

NickE63

would love to see how your cls sounds straight piped? get us a video if you dont mind pal

sebc63

I just got my cel come on. Straight pipes, Rentech tune. (M157) I have the tune now for about a month. Everything was fine till today. Drove it hard today and after I restarted the car the cel came on and whole car shakes when sitting still. Also I have another ECU with the stock tune and I plug that in and cel come on that too. I hope its the plugs.

otherotherbenz

will do as soon as i get back from vacation

xtyper

Bummer. This worries me, because I think you're running the shelf Renntech tune like me, which is supposed to work fine with the stock plugs.

Please keep us posted on what you find!

Mockbam5

Any updates?

NickE63

please do and will it be to loud for a baby to sit in the vehicle?

NickE63

ITS THE PLUGS ILL BET MY SISTERS *** ON IT

Rock

I find it interesting that not one of our many sponsors/tuners have posted their thoughts and the corrective measures needed to avoid these issue. Obviously there is a problem but I see them continue to sell their tunes like everything is fine.

I was ready to pull the trigger on a tune and downpipes but now I'm a bit hesitant. Fried plugs, CELs and limp mode are not items I need to come along with the promise of more power.

EdoubleNickel

Excellent point Rock. Theses motors are fairly new and I belive at some point we are going to find its archilles heels.

otherotherbenz

I think it will be a bit too loud but i'm not really sure, but from the inside the sound is rather deep and loud than crackling
Please note that if you have straight pipes and you tune your car, the sound is going to be even louder
Right now, I am very very satisfied with my exhaust note, my friends say it sounds like thunder lol

otherotherbenz

Rock, if you want to be safe, just slap on some racing spark plugs but if the problem occur now you can question the tune..
Trust me, the power gains you get is very very worth it and addictive..
When I had the misfiring issues, the dealer reseted my ECU back to stock and when I started the car up, I instantly noticed the sound difference.. and when I started to run the car, I literally was about to cry that my car is not as fun as before..

So my point is that if you are not ready for the tune, don't tune your car because once you tune your car, you can never go back

NickE63

I AGREE, ITS WORTH IT

Mockbam5

What kind of racing plugs would you recommend?

NickE63

good question! checked Bosch NGK Champion etc cant find anything on there sites

freefall

I have been testing these plugs for a little as a recommendation from Renntech if "I was going to track the car."
Bosch high power RB ZMR5ttP339 which can be ordered at BMW
dealership pn: 12120038832
I would also suggest checking the coil packs as this was another culprit of my misfires and CELs. I am not saying this is right for everyone as I have specific tune from Renntech for catless DPs but I am running them now with no issues...we think...

sebc63

Waiting for a tow truck. Not drivable. Cant even get up the hill. Whole car is shaking like a tank. I hope its nothing serious. It seems like bad gas and problem with injectors. I dont know I give up at this point. Its going back to dealer!!!

xtyper

That sucks. Please keep us posted on what the dealer says. Hopefully it's as simple as a spark plug replacement. What is your car's build month/year?

sebc63

2012 E 63 PP with a tune and straight pipes. I have 8,500 miles on it