Car won't rev over 5k rpm
03-20-2023, 09:28 AM
#1
Newbie
Thread Starter
Join Date: Feb 2021
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
2013 Cls63
Car won't rev over 5k rpm
In the past I've had issues with misfire and the car going into a temporary limp mode at high rpm due to oil in the harness from the old cam sensors.
However a while back the car became stuck in a type of limp mode where the rpms will not surpass 5,000 rpms in any gear. It's essentially like the rev limiter is now at 5k rpms exactly. The car will hit 5k rpm and lose power then upshift and so forth.
My question: is there anyway I can remove this mode at home so the rev limiter goes back to normal? I've tried unplugging the battery and what not
However a while back the car became stuck in a type of limp mode where the rpms will not surpass 5,000 rpms in any gear. It's essentially like the rev limiter is now at 5k rpms exactly. The car will hit 5k rpm and lose power then upshift and so forth.
My question: is there anyway I can remove this mode at home so the rev limiter goes back to normal? I've tried unplugging the battery and what not
03-20-2023, 01:35 PM
#3
Newbie
Thread Starter
Join Date: Feb 2021
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
2013 Cls63
I do know that there is oil throguhout the engine's harness.
This issue was brought up here by another user. The car must have some type of fail safe to limit the car to exactly 5k rpms. I have heard vague mentions of this before in other places online, but cant find anything anymore.
https://mbworld.org/forums/w212-amg/650030-car-not-revving-over-5000rpm.html < As this user mentioned a problem with knock sensor Perhaps oil has leached into the knock sensor connections and needs to be cleaend
I am not sure. I need to figure out where the knock sensor locations are and spray the connections with cleaner
Last edited by hyundaimg; 03-20-2023 at 01:45 PM.
03-20-2023, 01:59 PM
#5
Newbie
Thread Starter
Join Date: Feb 2021
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
2013 Cls63
the car had it's resonator (possibly secondary cats) removed and was tuned by the previous owner, but I cannot confirm this 100% nor know what tune it has
Last edited by hyundaimg; 03-20-2023 at 02:45 PM.
03-20-2023, 02:50 PM
#6
those faults are related to decat and if it has a tune those faults should not appear, first check that the car has no cats or gutted then contact a tuner and flash your car with a stock file but with O2 deleted, then you can check if the issue will be solved.
