ROGUE.AMG

My friend just got this done to his e55 and we went for a christmas eve freeway run and something blew due to the over rev of the engine. After the over rev, it sounded like a cylinder was misfiring and the car was idling rough. Right away we pulled over, the car was running rough, the temp was fine no oil leaking from under the car. We tried to look for any leaks or cracks nothing that we could see, then finally white smoke started to come from the exhaust, so we shut the car off.
Still trying to diagnose the problem if anyone else has had this happen or similar symtoms please share your experiance. I will post a video of the car at idle right after it happened so you can listen to the engine.

Does eurocharged recommend any head work before upgrading the TCU?

I think it might be a problem with the head gasket or even worse a warped head. hopefully someone has had this
happened and diagnosed so this beast can get back on the road.

kustom2k1

That sox! I was planning on having the TCU done. Do they remove the rev limiter?

AMG3.2

Wow that's horrible. They don't remove the rev limiter, but they do up it for the C32 to 6500 RPM.

Wilsophia

u did a wrong down shift and cause over rev ?
or just floor the gas and cause over rev ?

tw2

The ecu controls the rev limiter not the tcu. As far as the ecu is concerned, it is optional not to increase the rev limiter anyway so you certainly cannot blame the tcu for this or at least not with the C32.

wally AMG

OMG ..

ROGUE.AMG

http://www.youtube.com/watch?v=LjtC6qT-pj4

kustom2k1

Sounds like some cylinders arent firing.

wally AMG

white smoke ?

kustom2k1

Hows the engine sound (underhood) any knock? Does it make a tap tap, or knocking sound?

AMG3.2

Wait, the TCU definitely does control rev limiter. I have a TCU tune that I just got and it can and did raise the rev limiter.

tw2

If I were to guess (since I don't know for certain), the ecu controls the redline of the engine ie where you get fuel cut if you rev too high in a manual. The tcu controls the rev limit at which the transmission changes gear. Therefore the tcu could increase the rpm at which gear changes occur while still being within the tollerance of the ecu redline.

Robert AMG

iTrader: (1)

Do you have an ECU tune? The rev limiter is only and only controled from the Ecu, ex: if you have rev limiter in the Ecu set at 6500 and the Tcu shifts set at 6600, so you will hit rev limiter at 6500, if the Tcu shifts set below rev limiter so the car shift normaly before reaching the rev limiter set in the Ecu.

WaveyKat

did he get a check engine light?

AMG3.2

So your saying I need an ECU tune? I don't have one by the way. This will be my last post about me lol I don't mean to thread jack. Sorry OP.

Robert AMG

iTrader: (1)

Tw2 has well explain it, if he don't have an ecu tune the rev limiter is still where the manufacture has put it, so he did not overreved the engine, we cannot blame the tuner.

loungn14

whos your friend? I just find it odd we get a person with 5 posts saying somthing like this...

and yes, rev is ecu controlled

320 dreamer

he pal is jonncy2000 from the e55 thread were he ran his e55 at wot in 28* weather with full mods no fuel rail mod or bigger injectors or datalogg setup and tried to manually shift at 6500 rpm and bounced it off the limiter. gee i wonder why it blew!

loungn14

yikes...that would do it...

bruces (ttm motorsports) fuel rail should be required installation after any other mods on the 55...

cal1

After any mods? Is a tune required after installing Bruces fuel rail?

320 dreamer

im running a prototype rail only (no new injectors yet) and my afr went almost 2 full points richer. from 11.8 to high 9's so i retuned twice to get the afr's were i wanted them back into the high 11's which should translate to added hp as bonus
i saw the lean issues the e55 engines were having and we have a very similar engine and rail setup so i persuaded bruce to build me a rail to try and datalogg the results for him. while fuel issues arent as bad an issue with the c32 the slk32/srt-6 engines see huge lean conditions with the 181/185 pulleys and i felt this could help cure some problems and ensure a even flow of fuel to all cylinders no matter what car its on.

loungn14

around 500whp is where many have said, I just like being safe. I personally would do it after 2 decent mods...ie pulley/tb/headers/etc

yes a tune is REQUIRED after, otherwise you will wash the cylinders. Thats another reason we offer free retunes...

cal1

Thanks for the info guys.

I resemble the comment in bold or at least my SL does. Looks like a fuel rail and new Jerry tune is in my SLs future.

ROGUE.AMG

Definitly not blaming anything on the tuner!
I was just wondering what you guys recommend to prevent that from happening. Like you said fuel rail upgrade the injectors. Anything else to build the head?
BTW. Yes white smoke and also the check engine light.
i hope it is just a head gasket and the engine is fine.

ROGUE.AMG

Better Safe then Sorry! that is good advice.