bigbodybeeenz

I'm thinking about getting my ECU done, but I really hate CEL's, especially after the whole CEL ordeal I already went through when I got my car.

So I'm wondering for all the MHP, PWRChp, Kleemann, Renntech flashed ECU's out there:

What are your experiences with CEL's so far?

Thanks in advance.

dremorg

Good question. I would luv that extra power but that is the thing that I'm afraid of also.

mthis

i had the evospoert/ powerchip no CEL's poped up. as far as the others ill let you know when i get another ecu in by the end of next week.

C63 Guy

You've got a valid concern there. After I had my remap done at Evosport, the CEL came on and they found it to be from a pressure sensor in the exhaust manifold getting tripped at low to mid rpm. They took a few stabs at it, and in the end they dialed back the torque increase at the bottom end, and eased off the throttle map compared to the original remap. Apparently the '09s have a lower threshold on the sensors and can't take quite as much low rpm power. They said the peak power and torque were still as quoted, but they had to take the edge off in the mid range.

Also, I'm not a motor guy, so if I misstated anything please correct me if you (whoever you may be) knows better.

Thanks, and I hope this helps,

Josh

MNL ICE

Stock > Power Chip > Cel On > Cel Off > Cel On > Refund > Stock

OverBudget

Got a CEL after my ECU, but it was the stock CEL issue with the cam sensor. Dealer fixed it, no more CEL's since...

C63 Guy

For. The. Win.

Kudos.

Josh

MNL ICE

NOW : Stock > Power Chip > Cel On > Cel Off > Cel On > Refund > Stock > Read Zo's Thread, Got Excited > Read Mthis' Post, Got Scared > Still thinking If I should Do It Again!!!

55AMG-ARG

I got my ecu back today. I put 200 kms on the car since then, driving the ***** out of it. No cel. You can definitely feel the power gain...I will make a proper thread with dyno results and everything next week.

MHP

No CEL/MILs with our tuning.

The ironic part is I got a CEL before tuning with just K&N drop ins. Code was bank 1 too lean, LOL.

c63ukraine

MHP. No cells so far. was driving for 300 miles now.

(ZO)

Powerchip

CEL on for three times, back to PC twice, third time they say they are going to do a dyno tune to fix it in one go early next week. I will post the dyno result.

taylorcoleman

Morning all. Please pardon the newbie questions regarding ECU upgrades:

1) Does flashing the ECU without upgrading the air intake and the exhaust put negative strain on the engine? I realize the engine will be working harder, but given the air intake and exhaust are restricted in the C63, is it ultimately better for the engine to have the intake and exhaust upgraded as well--not just from a perfomance standpoint, that's obvious, but from an engine wear and tear perspective.

2) I've seen posts about the ECU upgrades being tweaked onsite. I'm not close to the ECU tuners, so I'd do everything by mail. Does this likely mean that I'd be shipping my ECU back and forth until no warning lights come on, etc.?

Thanks

scarbrtj

That's good to hear. Why can't others be so definitive?

bigbodybeeenz

+1

How can you be so definitive?

MHP

Because none of our customers have CELs. If the check sums don't add up, that's when you have problems.

MHP

Not at all. A freer flowing intake/exhaust will help make the motor (essentially just a large air pump) more efficient overall, though they are not necessary and the gains netted by said parts are far less than what we see from ECU/TCU alone.

We can tune on site in real time or remotely if you FedEx or UPS us your ECU. We don't have CEL issues so you won't have to return your ECU to us.

I'll be in the car heading to MIR in 30 minutes (8hr drive) if you have any further questions or concerns please don't hesitate to call me on my cell 614 940 9523

Thanks
Andy

MHP

Thanks for posting your experience Andrey.

Sincity

Perhaps give MHP a shot?

Sincity

That is a brave thing to do!

taylorcoleman

Cool, much appreciated. I think at this point only thing holding me back is the Pittsburgh winter...

MHP

Drivability in the snow isn't diminished a bit. I actually made a wrong turn looking for gas on the way home tonight in WV and found myself on backroads covered in ice and 3-4" of snow. Even with MT DRs the car was 100% controllable and had no issues starting from a stop. I was amazed myself.
The best part about winter is the dense air, the car absolutely RIPS to 150. New speedo/tach vids coming soon.