Big HP fuel problems (pic) Solutions?
MBWorld Fanatic!
Joined: Nov 2008
Posts: 1,916
Likes: 39
From: Northern VA
2006 E55
Does anyone have shop diagrams for the various e55 fuel systems they can download and post here?
I have been searching the boards and there seems to be limited, and somewhat contradictory, info out there.
I am having trouble chasing my lean gremlin and would like a bit more info before I start throwing parts at the problem.
Thanks.
I have been searching the boards and there seems to be limited, and somewhat contradictory, info out there.
I am having trouble chasing my lean gremlin and would like a bit more info before I start throwing parts at the problem.
Thanks.
Thread Starter
PLATINUM SPONSOR
Joined: Jun 2008
Posts: 3,834
Likes: 65
From: Texas
2003 CL55
These ECU`s have some crazy adaptive programs though.. Like a brain of thier own..
__________________
E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
Super Member
Joined: Jun 2008
Posts: 855
Likes: 1
2010 C63
another challenge is getting a good idle. Larger injectors may not be able to flow low enough to idle. If you set the pulsewidth too small, injectors just don't open. So during tuning you go from running way too rich to just not running at all.
If you need way huge injectors, you may have to play with supplemental injectors or variable fuel pressure.
If you need way huge injectors, you may have to play with supplemental injectors or variable fuel pressure.
MBWorld Fanatic!
Joined: Nov 2008
Posts: 1,916
Likes: 39
From: Northern VA
2006 E55
Thanks to Shardul!
Got these sent via PM (you the man Shardul) and thought I would post in the interest of having the info out there...not trying to thread jack...lol.
This appears to be the fuel filter/sender under the drivers side rear seat:
This one seems to be the fuel pump assembly under the passenger side rear seats? It looks as if there may be two pumps there???
Anybody have part numbers for the filter or pump(s)?
This appears to be the fuel filter/sender under the drivers side rear seat:
This one seems to be the fuel pump assembly under the passenger side rear seats? It looks as if there may be two pumps there???
Anybody have part numbers for the filter or pump(s)?
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Super Member
Joined: Feb 2009
Posts: 692
Likes: 73
From: Houston, TX
2003 E55 AMG; 2013 GL550 4Matic; 2003 CL600
Time to teach a man to fish!
Subscribe here: http://epc.startekinfo.com/epc/subscribe.jsp
Choose the free option and give them your credit card, they wont charge you. You will get an account and a password, and will have to renew it again in a year.
If your computer/browser doesnt have Java runtime, then google is your friend, install it.
Login at http://epc.startekinfo.com/epc/login.jsp, and launch the application. Enter your VIN for quickest access to parts relevant to your car's model year and options.
Subscribe here: http://epc.startekinfo.com/epc/subscribe.jsp
Choose the free option and give them your credit card, they wont charge you. You will get an account and a password, and will have to renew it again in a year.
If your computer/browser doesnt have Java runtime, then google is your friend, install it.
Login at http://epc.startekinfo.com/epc/login.jsp, and launch the application. Enter your VIN for quickest access to parts relevant to your car's model year and options.
MBWorld Fanatic!
Joined: Nov 2008
Posts: 1,916
Likes: 39
From: Northern VA
2006 E55
Thank you!!!
Been spending time on this forum for awhile now and honestly never knew this was available. Already been there and subscribed, what a valuable resource.
Sorry, back on topic...lol.
Been spending time on this forum for awhile now and honestly never knew this was available. Already been there and subscribed, what a valuable resource.
Sorry, back on topic...lol.
Thread Starter
PLATINUM SPONSOR
Joined: Jun 2008
Posts: 3,834
Likes: 65
From: Texas
2003 CL55
This thread is about fuel, so no jack felt..
Hadilaw just texed me and said that puppy for the e55 is 350.00 bucks shop cost!!! Ouch! This E85 crap can assist in eating up seals , gas tanks and other stuff too.. At leas that is the rumor..
I can tell you that mine filter poured out nasty black gas! 50k miles and I am carefull where I fill up.. I only use Shell and stick with semi new stations..
Mine was 40 bucks list and 10 minutes to change.. The CL got a break finally on something..
Fuel filter is a damn important part on these modified engines, so don`t overlook it.. I am kicking myself for not checking it and for assuming it was changed on my motor rebuild..
Hadilaw just texed me and said that puppy for the e55 is 350.00 bucks shop cost!!! Ouch! This E85 crap can assist in eating up seals , gas tanks and other stuff too.. At leas that is the rumor..
I can tell you that mine filter poured out nasty black gas! 50k miles and I am carefull where I fill up.. I only use Shell and stick with semi new stations..
Mine was 40 bucks list and 10 minutes to change.. The CL got a break finally on something..
Fuel filter is a damn important part on these modified engines, so don`t overlook it.. I am kicking myself for not checking it and for assuming it was changed on my motor rebuild..
__________________
E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
MBWorld Fanatic!
Joined: Jan 2005
Posts: 4,276
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From: Bay Area
2015 E63S, 2018 E63S
since we are talking about fuel, here is an old thread from last year
Former Vendor of MBWorld
Joined: May 2009
Posts: 2,305
Likes: 93
From: Valley of the Sun, Arizona
C63, SL55, E55, CLS55, ML63, C55
here is an interesting read
sorry for the pics, I didn't have a scanner available.
On of the words blurred out by my flash, is "Modified"
sorry for the pics, I didn't have a scanner available.
On of the words blurred out by my flash, is "Modified"
Senior Member
Joined: Jan 2006
Posts: 255
Likes: 0
From: Tustin, CA
2003 E55 AMG
I've been running E85 for a total of about 30k miles with no problems in my evo. No corrosion in the fuel tank, no "gunked up" injectors, no fuel line problems, etc.
Former Vendor of MBWorld
Joined: May 2009
Posts: 2,305
Likes: 93
From: Valley of the Sun, Arizona
C63, SL55, E55, CLS55, ML63, C55
Super Member
Joined: Nov 2006
Posts: 952
Likes: 9
From: NJ/Greece
2006 CLS55 & 2002 SL55 (R129) Silver Arrow
Fortunately all 55's use Bosch ME 2.8 ECU's which have enough flexibility to adjust idling if a slightly larger injector were to be used.
Though tuning would still be required to properly dial them in.
Last edited by Tech-Tune; Jun 9, 2010 at 10:04 AM.
MBWorld Fanatic!
Joined: Nov 2008
Posts: 1,916
Likes: 39
From: Northern VA
2006 E55
Also another interesting thing, the E55's (and I assume all 55K cars) have an easily accessible outlet on the fuel rail to test for fuel pressure. I assume some sort of MB tool connects to this, but I am wondering if an aftermarket sensor could be fitted. It appears to be a simple AN fitting.
Anybody have experience with this?
Anybody have experience with this?
Former Vendor of MBWorld
Joined: May 2009
Posts: 2,305
Likes: 93
From: Valley of the Sun, Arizona
C63, SL55, E55, CLS55, ML63, C55
Also another interesting thing, the E55's (and I assume all 55K cars) have an easily accessible outlet on the fuel rail to test for fuel pressure. I assume some sort of MB tool connects to this, but I am wondering if an aftermarket sensor could be fitted. It appears to be a simple AN fitting.
Anybody have experience with this?
Anybody have experience with this?
Senior Member
Joined: Jan 2006
Posts: 255
Likes: 0
From: Tustin, CA
2003 E55 AMG
Senior Member
Joined: Jan 2006
Posts: 255
Likes: 0
From: Tustin, CA
2003 E55 AMG
Also, a device that I would highly recommend if you are running E85 is an ECA (Ethanol Content Analyzer), due to the varying percentages you will get from the pump. I have yet to fill up with E85 from the pump and get a consistent reading; sometimes I get E70 and sometimes I get E90. This is due to the way that gas stations receive their E85, which is they get a fuel truck of 100% ethanol that pumps ethanol into the fuel storage tank and then the top it off by HAND with regular gas until they get it near E85. Of course this method is not the most accurate and this is why I found it very important to purchase my ECA after scratching my head, wondering why my car would sometimes run pig rich or lean.
MBWorld Fanatic!
Joined: May 2008
Posts: 3,077
Likes: 2
2006 E55 AMG
Also another interesting thing, the E55's (and I assume all 55K cars) have an easily accessible outlet on the fuel rail to test for fuel pressure. I assume some sort of MB tool connects to this, but I am wondering if an aftermarket sensor could be fitted. It appears to be a simple AN fitting.
Anybody have experience with this?
Anybody have experience with this?
Just recently I witness a E55 having huge fuel issues with the car going extremely lean at the upper RPM's. Once the fuel system was replaced with factory parts fuel was no longer an issue. His fueling problem was a 10x worse than mine and honestly believe this will fix my problem.
Here's a log of one of my runs. This was done late last year with a mix of 91 and 100 Sunoco oxygenated race fuel. You'll notice that the fuel pressure is 65 psi at the top of 3rd.
Last edited by bassn_07; Jun 10, 2010 at 12:23 AM.
