Engine Data Screen Accuracy
09-18-2018, 05:26 PM
#1
Senior Member
Thread Starter
Join Date: Aug 2016
Location: Great White North
Posts: 274
Likes: 0
Received 37 Likes
on
29 Posts
Polar White C43 Sedan
Engine Data Screen Accuracy
So I was watching the engine data display screen on my 17 C43.
I was surprised to see that full throttle pulls only showed a max of around 325 Tq and 275 hp.
Anybody seen better numbers? Should I be seeing a full 362 HP and 384 Tq?
I got walked by a C400 a few weeks back which I figured was chipped but now that I see these numbers, could I be running down on power?
Signed,
Curious George
I was surprised to see that full throttle pulls only showed a max of around 325 Tq and 275 hp.
Anybody seen better numbers? Should I be seeing a full 362 HP and 384 Tq?
I got walked by a C400 a few weeks back which I figured was chipped but now that I see these numbers, could I be running down on power?
Signed,
Curious George
09-18-2018, 09:01 PM
#3
Super Member
iTrader: (1)
Join Date: Oct 2017
Location: Massachusetts
Posts: 836
Received 132 Likes
on
112 Posts
2018 C43 AMG Brilliant Blue Metallic
So I was watching the engine data display screen on my 17 C43.
I was surprised to see that full throttle pulls only showed a max of around 325 Tq and 275 hp.
Anybody seen better numbers? Should I be seeing a full 362 HP and 384 Tq?
I got walked by a C400 a few weeks back which I figured was chipped but now that I see these numbers, could I be running down on power?
Signed,
Curious George
I was surprised to see that full throttle pulls only showed a max of around 325 Tq and 275 hp.
Anybody seen better numbers? Should I be seeing a full 362 HP and 384 Tq?
I got walked by a C400 a few weeks back which I figured was chipped but now that I see these numbers, could I be running down on power?
Signed,
Curious George
09-19-2018, 09:05 AM
#6
Senior Member
Thread Starter
Join Date: Aug 2016
Location: Great White North
Posts: 274
Likes: 0
Received 37 Likes
on
29 Posts
Polar White C43 Sedan
Whats interesting is the low/mid range seems to be "normal" based on my butt dyno, but it's the top end that is soft and the power gauge shows losing power but there are no other messages on the dash or any service notes in the menu. I would have figured it would have a message if it was in an official "limp mode".
I do hope however there is something wrong because I need more speed. Lol
I do hope however there is something wrong because I need more speed. Lol
Trending Topics
09-19-2018, 09:17 AM
#10
09-19-2018, 09:31 AM
#11
Senior Member
Thread Starter
Join Date: Aug 2016
Location: Great White North
Posts: 274
Likes: 0
Received 37 Likes
on
29 Posts
Polar White C43 Sedan
The car sounds normal for sure, it's just not showing full power (assuming the gauges are correct) and the car does seem to drop off power in the higher revs.
09-19-2018, 10:40 AM
#16
Senior Member
So I was watching the engine data display screen on my 17 C43.
I was surprised to see that full throttle pulls only showed a max of around 325 Tq and 275 hp.
Anybody seen better numbers? Should I be seeing a full 362 HP and 384 Tq?
I got walked by a C400 a few weeks back which I figured was chipped but now that I see these numbers, could I be running down on power?
Signed,
Curious George
I was surprised to see that full throttle pulls only showed a max of around 325 Tq and 275 hp.
Anybody seen better numbers? Should I be seeing a full 362 HP and 384 Tq?
I got walked by a C400 a few weeks back which I figured was chipped but now that I see these numbers, could I be running down on power?
Signed,
Curious George
Like Dan mentioned, you could be in limp mode or you may have the problem I had, a boost leak. I could hear a hissing noise when I got on the throttle. My car was only making 7 psi because my intercooler was not connected properly from the factory.
When you get the chance, take your engine cover off and inspect the hoses behind the radiator, make sure they are all tight, especially the gasket from your manifold to your intercooler.
09-19-2018, 12:23 PM
#17
Senior Member
Thread Starter
Join Date: Aug 2016
Location: Great White North
Posts: 274
Likes: 0
Received 37 Likes
on
29 Posts
Polar White C43 Sedan
The clamps seem tight (the ones I can reach) so I've gone to the dealer and they said they will need to test drive it.
Fingers crossed they find the problem quickly.
And thanks for the link DieselDan
Fingers crossed they find the problem quickly.
And thanks for the link DieselDan
09-19-2018, 03:34 PM
#19
Senior Member
Thread Starter
Join Date: Aug 2016
Location: Great White North
Posts: 274
Likes: 0
Received 37 Likes
on
29 Posts
Polar White C43 Sedan
So the tech says there is no such thing as soft limp mode and he wasn't sure if the gauges should go full power.......Ugh.
He was going to do a bit more research but I suspect not much will happen as a result.
He was going to do a bit more research but I suspect not much will happen as a result.
09-19-2018, 04:26 PM
#20
MBWorld Fanatic!
"Soft limp mode" is more of the defacto forum term. What's really happening is a non-critical operation code is being thrown in the background, but as the doesn't "technically" effect operation, it doesn't throw a CEL. It's silly, but if it's actually the case, the tech should see a code on record related to the PE operation.
09-19-2018, 08:40 PM
#23
Senior Member
Thread Starter
Join Date: Aug 2016
Location: Great White North
Posts: 274
Likes: 0
Received 37 Likes
on
29 Posts
Polar White C43 Sedan
Great Video.
Mine doesn't get anywhere near that. It wavers on the way up and then TQ drops off a lot just before the shift.
I'll take a longer video shortly.
Mine doesn't get anywhere near that. It wavers on the way up and then TQ drops off a lot just before the shift.
I'll take a longer video shortly.
09-20-2018, 12:33 AM
#24
If the car was sitting for a while at some point, maybe try taking the battery out of the car, charging it fully, and reinstalling it after resetting the ecu. This worked for a friend of mine.
09-20-2018, 12:05 PM
#25
Senior Member
