Tune, new plugs
Can anybody recommend an upgraded plug
Sent my ecu out on thurs and then headed to Vegas for the weekend. Got back on sun and my ecu was waiting for me. Plug in and drove it for 5-10 miles. Wife was in the car so didn't really get to experience anything.
Next day I schedule my after Dyno run and drove 5-10 miles to the shop. Slapped it on the dyno and the car was pinging at high rpm.
We ran the car one more time and a cel popped up. It threw several codes p2272 p0627 p0420 p0036 p0056 b0da8 p0305
My biggest concern is the p0305 which is the misfire in cyclinder 5. The reason for this post is I researched the m157 spark plug recall and noticed others had the same code after the tune. I don't know my build date and have not serviced the car yet.
The Dino shopped clear all codes and I had been instructed to drive some more miles on the car to allow the ecu to adapt.
No problems so far and the car feels strong. I don't drive my car hard and if I get aggressive it's just in the 1-2 gear. By then I am flying on the streets and need to slow down.
I am worried that have always had a plug issues but never drove my car hard enough to have a problem. When I put the car on the dyno, the hard run cause the plug to fail? I did have the car dynoed before the tune and no problem
So my first mistake was that I didn't know about the adapt phase and should of put more miles on the car. I am going to put a couple more miles on I and see what happens.
Anybody have ideas
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Feels like exhaust is clogged, maybe burnt my cats or I don't have any idea. The violent shaking is scaring me
Also interesting is the fact that the three of you in this thread noting experiencing similar symptoms are all running the Eurocharged tune. Not implying anything, just making an observation.
Good luck and keep us posted what you find.
Last edited by xtyper; Nov 18, 2012 at 01:50 AM.
It's going to the dealer on Monday an hope they honor the warranty
Don't panic, I've been there..
First had a misfire after 1000 miles with tune. Dealer replaced all of my spark plugs and car ran fine. 2 days after, drove my car really hard and the same symptoms as yours occured (hard thump, when rev over 2k car vibrates really hard, CEL on, restart the car, CEL still on but car drives fine under 90mph).. Took it to service center again, they couldn't find the problem, so they just cleared up the codes.. a week after, same thing happened all over again..
So I contacted my tuner, they retuned my car, CEL gone, car back to normal..
Conclusion:
I think with some tunes/cars, the engine misfire causes some kind of software glitch, which causes the car to go into limp mode. And I guess a retune would be needed to clear it up.
*please note that the MB service center is full of *****
My car have straight pipes installed and they said that it caused the problem, they advised me to put the resonator back on and it should do the problem. Then I asked, what if after I put my resonator back on, they CEL is still there. Then the SA replied: Now we know that your straight pipes somehow damaged the engine (because of reduced back pressure) and we will have to fix your car not under warranty.
If you think that we have the same problem here,
Don't panic and contact your tuner ASAP
Last edited by otherotherbenz; Nov 19, 2012 at 03:14 AM.
Don't panic, I've been there..
First had a misfire after 1000 miles with tune. Dealer replaced all of my spark plugs and car ran fine. 2 days after, drove my car really hard and the same symptoms as yours occured (hard thump, when rev over 2k car vibrates really hard, CEL on, restart the car, CEL still on but car drives fine under 90mph).. Took it to service center again, they couldn't find the problem, so they just cleared up the codes.. a week after, same thing happened all over again..
So I contacted my tuner, they retuned my car, CEL gone, car back to normal..
Conclusion:
I think with some tunes/cars, the engine misfire causes some kind of software glitch, which causes the car to go into limp mode. And I guess a retune would be needed to clear it up.
*please note that the MB service center is full of *****
My car have straight pipes installed and they said that it caused the problem, they advised me to put the resonator back on and it should do the problem. Then I asked, what if after I put my resonator back on, they CEL is still there. Then the SA replied: Now we know that your straight pipes somehow damaged the engine (because of reduced back pressure) and we will have to fix your car not under warranty.
If you think that we have the same problem here,
Don't panic and contact your tuner ASAP
My advice, contact your tuners and ask them to retune you with peak boost dialed back a bit. I bet that solves the problem.
I never checked boost on the dyno and have no idea what I am running.
Car is going into the dealer today. I am hoping that changing the plugs will fix the issue but not betting on it.
My CEL is not on currently but sure if I drive hard it will show up.
So based on all the comments on various threads, issues with specific tuners are
1.eurocharged
2.Renntech
3.Weistec
I am wondering if there are other issues but just not being reported
My advice, contact your tuners and ask them to retune you with peak boost dialed back a bit. I bet that solves the problem.
Maybe a colder plug will fix the problem
I never checked boost on the dyno and have no idea what I am running.
Car is going into the dealer today. I am hoping that changing the plugs will fix the issue but not betting on it.
My CEL is not on currently but sure if I drive hard it will show up.
So based on all the comments on various threads, issues with specific tuners are
1.eurocharged
2.Renntech
3.Weistec
I am wondering if there are other issues but just not being reported
I never checked boost on the dyno and have no idea what I am running.
Car is going into the dealer today. I am hoping that changing the plugs will fix the issue but not betting on it.
My CEL is not on currently but sure if I drive hard it will show up.
So based on all the comments on various threads, issues with specific tuners are
1.eurocharged
2.Renntech
3.Weistec
I am wondering if there are other issues but just not being reported
The issue is not the tuner, but the boost targets of the tune itself.








