C63s cuts power, quantity control valve
Thread Starter
Newbie
Joined: Mar 2016
Posts: 9
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From: Sweden
Mercedes Benz C63 AMG -11
C63s cuts power, quantity control valve
Hello everyone! Im trying to help my friend with his C63s m177. It is tuned with bigger turbos, downpipes, spool performance fx-150 hpfp and a lpfp. The car har been working fine until now. It cuts all power on full throttle but only when hot and sets P1CCB The Quantity control valve (cylinder bank 2) - has a short circuit to positive. Has anyone seen this before? His tuner is no longer working so we cant ask him for help anymore.
I was thinking about switching sides on the fuelpumps to se if the code sets on bank 1 instead.
Any help will be much appreciated thx.
I was thinking about switching sides on the fuelpumps to se if the code sets on bank 1 instead.
Any help will be much appreciated thx.
Member
Joined: Oct 2012
Posts: 157
Likes: 13
From: Warrington UK
W211 E55 AMG & W163 ML270
Hello everyone! Im trying to help my friend with his C63s m177. It is tuned with bigger turbos, downpipes, spool performance fx-150 hpfp and a lpfp. The car har been working fine until now. It cuts all power on full throttle but only when hot and sets P1CCB The Quantity control valve (cylinder bank 2) - has a short circuit to positive. Has anyone seen this before? His tuner is no longer working so we cant ask him for help anymore.
I was thinking about switching sides on the fuelpumps to se if the code sets on bank 1 instead.
Any help will be much appreciated thx.
I was thinking about switching sides on the fuelpumps to se if the code sets on bank 1 instead.
Any help will be much appreciated thx.
Quantity control valve I think that commands the waste gates
Does his car still rev just no boost
Thread Starter
Newbie
Joined: Mar 2016
Posts: 9
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From: Sweden
Mercedes Benz C63 AMG -11
Okay maybe thats why it cuts the power...
No it cuts the power on WOT and high rpms, it feels like when you let your foot off the throttle completely then you can give it again with no problem until it reaches high rpms then it cuts as before. And the code is back again.
No it cuts the power on WOT and high rpms, it feels like when you let your foot off the throttle completely then you can give it again with no problem until it reaches high rpms then it cuts as before. And the code is back again.
Member
Joined: Oct 2012
Posts: 157
Likes: 13
From: Warrington UK
W211 E55 AMG & W163 ML270
You need to have a look at the live data to see what it's doing
Thread Starter
Newbie
Joined: Mar 2016
Posts: 9
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From: Sweden
Mercedes Benz C63 AMG -11
Switched sides on the quantity control valves and the fault is even worse now. Now it cuts all the time on WOT but the code is still on bank 2. Do anyone have a wiring diagram for the quantity control valves?
Thread Starter
Newbie
Joined: Mar 2016
Posts: 9
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From: Sweden
Mercedes Benz C63 AMG -11
This issue is now fixed! It was the fuelpump failing, FX-150 Spool Performance HPFP.
It lost 30-60 bar of fuelpressure suddenly on WOT, replaced the pump with a spool FX-170 and the issue is gone.
It lost 30-60 bar of fuelpressure suddenly on WOT, replaced the pump with a spool FX-170 and the issue is gone.
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W211 E55 AMG & W163 ML270
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W205 C63 AMG Coupe
Curious to know if the FX-150 pump was falling or if the motor was demanding more fuel than it could supply, resulting in the issue. If you could update once you know that would be great.
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Newbie
Joined: Mar 2016
Posts: 9
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From: Sweden
Mercedes Benz C63 AMG -11
The ecu was demanding 180-220 bar and sometimes on wot the pressure droped below that and the car cut the power. This was on Bank 2 (driverside) the pressure on Bank 1 was steady on 205-215 bar.
