Tuned ECU problem?
Thread Starter
Newbie
Joined: Apr 2016
Posts: 5
Likes: 0
C63
Tuned ECU problem?
I purchased a used 2009 C63 just over a year ago from a used dealership. It has several performance modifications from renntech. ECU tune, long tube headers + exhaust + cold air system.
I had a CE light referring to a fuel rail pressure sensor back in september. They (MB) replaced the sensor and all seemed to be fine. A week ago the CE light came on. I had them check the code and it was the same thing. They replaced it again and said there was fuel in the sensor or something along those lines. I picked up the car and the CE was still on. They ran it again and said the ECU was now asking for 6000 psi from the fuel pump? They said there was no answer other then flashing the ECU with factory tuning to fix the problem.
Has anyone had any exp with this? Flashing will get rid of the renntech tune so I was disapointed to hear their answer as I did not buy the tune originally it will cost 2k to have it placed on again it seems.
I had a CE light referring to a fuel rail pressure sensor back in september. They (MB) replaced the sensor and all seemed to be fine. A week ago the CE light came on. I had them check the code and it was the same thing. They replaced it again and said there was fuel in the sensor or something along those lines. I picked up the car and the CE was still on. They ran it again and said the ECU was now asking for 6000 psi from the fuel pump? They said there was no answer other then flashing the ECU with factory tuning to fix the problem.
Has anyone had any exp with this? Flashing will get rid of the renntech tune so I was disapointed to hear their answer as I did not buy the tune originally it will cost 2k to have it placed on again it seems.
Thread Starter
Newbie
Joined: Apr 2016
Posts: 5
Likes: 0
C63
Thanks for the advice. I assume those tunes should work just fine with the other after market components that are on the car currently? My local MB says they are worried to flash it because they think the car wont work with the aftermarket parts once its factory tuned. I am learning as I go here so I not sure their fears are warranted or not.
MBWorld Fanatic!
Joined: Nov 2014
Posts: 2,575
Likes: 407
From: Olathe, KS
'13 C63 AMG P31
Renntech does good work but I have to agree, their prices are outlandish. The car would work but just not run to full potential. Like chrisridebike8, there are other good options that are cheaper.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
MBWorld Fanatic!
Joined: Nov 2014
Posts: 2,575
Likes: 407
From: Olathe, KS
'13 C63 AMG P31
. Or you can msg any of them, they are pretty quick to reply back.Example -
Eurocharge Tune
