Code p0191
Thread Starter
MBWorld Fanatic!
Joined: Jan 2009
Posts: 4,563
Likes: 42
C63 AMG
Code p0191
I switched to a smaller pulley, the car was running fine initially but now it won't cruise. I keep getting huge power loss on and off, it dies than comes back on so hard it hammers the driveline.
Pulled a p0191 code.
105,000km on car, anyone else get this? Under load or full power, the car is a rocket and just made great power at the dyno.. but it won't cruise and even died a few times on me after I started it. I went to the track and it pulled great too.
Pulled a p0191 code.
105,000km on car, anyone else get this? Under load or full power, the car is a rocket and just made great power at the dyno.. but it won't cruise and even died a few times on me after I started it. I went to the track and it pulled great too.
MBWorld Fanatic!
Joined: Feb 2011
Posts: 1,752
Likes: 175
From: London, UK
W212 - E63 AMG
I wonder if STAR gives operating ranges for the fuel pumps under varying amounts of load and lets you know if they're both in good order 
A simpler fix would be a nice fuel rail sensor I suppose.
A simpler fix would be a nice fuel rail sensor I suppose.
Trending Topics
MBWorld Fanatic!
Joined: Feb 2010
Posts: 5,649
Likes: 484
2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Unfortunately OE Discount Parts does not ship outside the continental US which is a complication as Merc63 is in Alberta. Maybe transship or use a border pick up place if there is one.
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
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
Thread Starter
MBWorld Fanatic!
Joined: Jan 2009
Posts: 4,563
Likes: 42
C63 AMG
Well I had some extra pumps and control modules from my smashed car, I switched them over tonight and still the code came back... I went to a buddies and switched fuel pressure sensors, code gone so far, knock on wood.
So it was the fuel press sensor giving me all the grief... I wonder if it just **** the bed or this 116octane Fuse race fuel (unleaded) took it out?
Back to racing this weekend and installing the meth kit now.
So it was the fuel press sensor giving me all the grief... I wonder if it just **** the bed or this 116octane Fuse race fuel (unleaded) took it out?
Back to racing this weekend and installing the meth kit now.
MBWorld Fanatic!
Joined: Apr 2013
Posts: 1,506
Likes: 66
From: Sidney, BC
2009 SLK55 AMG. & 2022 GLA250 4Matic
I switched to a smaller pulley, the car was running fine initially but now it won't cruise. I keep getting huge power loss on and off, it dies than comes back on so hard it hammers the driveline.
Pulled a p0191 code.
105,000km on car, anyone else get this? Under load or full power, the car is a rocket and just made great power at the dyno.. but it won't cruise and even died a few times on me after I started it. I went to the track and it pulled great too.
Pulled a p0191 code.
105,000km on car, anyone else get this? Under load or full power, the car is a rocket and just made great power at the dyno.. but it won't cruise and even died a few times on me after I started it. I went to the track and it pulled great too.
https://www.autocodes.com/p0191_mercedes-benz.html
Member
Joined: Jun 2018
Posts: 109
Likes: 2
C63 AMG W204
Well I had some extra pumps and control modules from my smashed car, I switched them over tonight and still the code came back... I went to a buddies and switched fuel pressure sensors, code gone so far, knock on wood.
So it was the fuel press sensor giving me all the grief... I wonder if it just **** the bed or this 116octane Fuse race fuel (unleaded) took it out?
Back to racing this weekend and installing the meth kit now.
So it was the fuel press sensor giving me all the grief... I wonder if it just **** the bed or this 116octane Fuse race fuel (unleaded) took it out?
Back to racing this weekend and installing the meth kit now.
