C43 Fuel Pump
Newbie
Joined: Jun 2020
Posts: 1
Likes: 0
c400
I recently got my C400 tuned by DME, and couple of months driving, I was in manual mode, going around 80mphs and all the sudden I heard like a backfire and the car kinda lost power but was driving fine. Check engine came on and was able to pull up a code P008700, said that the fuel pressure was low. I took it to my friends shop and he said the pumps are running fine. So I was thinking maybe it was the fuel that I put in it, I use premium as always but that time it was at a different gas station. Haven't came on since, anyone got an idea or maybe just a hiccup?
Got the same problem yesterday. I’m not tunned. Any updates on your car? It was a hiccup or something else?
Member
Joined: Jul 2018
Posts: 132
Likes: 27
2017 Mercedes C63s
I think it was just a hiccup, havent happened yet and its been almost 6 months. I think it was the has station that I went to and the gas that I got caused it.
Junior Member
Joined: Nov 2020
Posts: 54
Likes: 13
2017 213 E wagon
Member
Joined: Apr 2020
Posts: 147
Likes: 43
From: So Cal
2017 AMG C43
MBWorld Fanatic!
Joined: Feb 2017
Posts: 1,283
Likes: 353
From: Michigan
2017 C43 AMG
I know several cars running them. First cars had a few bugs to work out. Martin Tuning was great and kept close contact with all of them. A few of the cars are now running full e 85 or close to it and are currently dialing in the tune!
My personal vehicle is running low 9 second 60-130 on e30 tune with this pump!
Member
Joined: Apr 2020
Posts: 147
Likes: 43
From: So Cal
2017 AMG C43
yep!
I know several cars running them. First cars had a few bugs to work out. Martin Tuning was great and kept close contact with all of them. A few of the cars are now running full e 85 or close to it and are currently dialing in the tune!
My personal vehicle is running low 9 second 60-130 on e30 tune with this pump!
I know several cars running them. First cars had a few bugs to work out. Martin Tuning was great and kept close contact with all of them. A few of the cars are now running full e 85 or close to it and are currently dialing in the tune!
My personal vehicle is running low 9 second 60-130 on e30 tune with this pump!
MBWorld Fanatic!
Joined: Feb 2017
Posts: 1,283
Likes: 353
From: Michigan
2017 C43 AMG
Martin tuning is working with Eurocharged to perfect the tuning. You can buy all the parts directly from Martin Tuning. That is what many have done so far.
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Junior Member
Joined: Nov 2020
Posts: 54
Likes: 13
2017 213 E wagon
whats this going to cost complete and are you talking about the hpfp from the c63 or a spool thats on martin tuning website 3-4 for 50 hp ?
Member
Joined: Apr 2020
Posts: 147
Likes: 43
From: So Cal
2017 AMG C43
Nice!! Already have mine Eurocharged. Waiting for this to be dialed in.
Junior Member
Joined: Jun 2018
Posts: 28
Likes: 10
C450 AMG
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Joined: Jul 2012
Posts: 1,254
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2002 CL500 to CL55 conversion
Junior Member
Joined: Jun 2018
Posts: 28
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C450 AMG
yes send me a message or email ctravis595@gmail.com
Member
Joined: Apr 2022
Posts: 99
Likes: 12
'16 GLC 43 AMG
What fuel rails were used? I’m looking at what fuel system upgrades I can do to ensure I get adequate fuel, but I cannot find anything on better injectors. Before this thread, I saw the Spool Performance HPFP and LPFP. I haven’t checked the prices on the MB parts, but I assume they’re a bit cheaper in the end.
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,254
Likes: 171
2002 CL500 to CL55 conversion
What fuel rails were used? I’m looking at what fuel system upgrades I can do to ensure I get adequate fuel, but I cannot find anything on better injectors. Before this thread, I saw the Spool Performance HPFP and LPFP. I haven’t checked the prices on the MB parts, but I assume they’re a bit cheaper in the end.
most Hpfp kits for modern amg’s have you drill out the inlet port of the oem fuel rail’s to about 2mm. From the factory the opening is only about 1mm and is restrictive
Member
Joined: Apr 2022
Posts: 99
Likes: 12
'16 GLC 43 AMG
So is this a legit upgrade over the stock M276? Do we know what the gain is over the m276 one? I was considering the Spool FX-170, but I feel it might be overkill (which isn’t bad) for just wanting to keep it on UK95 octane. Has anyone drilled/milled out their stock fuel rails like ctravis595 mentioned? If so, then I’m going to scroll ebay to find some rails!
I was watching this video (that’s in German):
He’s using a HPFP from a Supra (from what I could vaguely understand since I don’t speak German). Hmmm…I’m going to start googling it a bit more to see compatibility.
Nino
Last edited by ninobrn99; Apr 25, 2024 at 10:08 AM.
Member
Joined: Apr 2022
Posts: 99
Likes: 12
'16 GLC 43 AMG
I spoke with the folks over at Spool Performance. Swapping from the factory M276 HPFP to the M278 isn’t an upgrade. I’m waiting on some German friends to let me know what they dude in the video was saying about using some other fuel pump. I believe he swapped to the BMW B58 Supra (Bosch BU58 TU) which is a HDP6 type fuel pump that supports ~575HP. The angle of the fittings are different (180 as opposed to 45 degrees like ours). Assuming the threads are the same, I wonder if the connector types are different and if so, how he got around that? If the threads are the same and the connector works with our cars, it would just be a matter of using an adapter to get the lines connected.
https://pumaspeed.co.uk/product-Genu...rade_18846.jsp
This is just me thinking out loud and hoping someone will chime in to help (or let me know why it wouldn’t work).
Ninoi
https://pumaspeed.co.uk/product-Genu...rade_18846.jsp
This is just me thinking out loud and hoping someone will chime in to help (or let me know why it wouldn’t work).
Ninoi
Member
Joined: Jun 2019
Posts: 79
Likes: 5
From: Iran
Glc43
So is this a legit upgrade over the stock M276? Do we know what the gain is over the m276 one? I was considering the Spool FX-170, but I feel it might be overkill (which isn’t bad) for just wanting to keep it on UK95 octane. Has anyone drilled/milled out their stock fuel rails like ctravis595 mentioned? If so, then I’m going to scroll ebay to find some rails!
I was watching this video (that’s in German):
https://youtu.be/WNip24iSyhI?si=C_MA69rE74LtyDjs
He’s using a HPFP from a Supra (from what I could vaguely understand since I don’t speak German). Hmmm…I’m going to start googling it a bit more to see compatibility.
Nino
I was watching this video (that’s in German):
https://youtu.be/WNip24iSyhI?si=C_MA69rE74LtyDjs
He’s using a HPFP from a Supra (from what I could vaguely understand since I don’t speak German). Hmmm…I’m going to start googling it a bit more to see compatibility.
Nino
Member
Joined: Apr 2022
Posts: 99
Likes: 12
'16 GLC 43 AMG
no luck. I’ve reached out to a few places and none have responded. You’d need an adapter harness because the BMW one is different from ours. I figured it out because I’d ordered an extension that’s normally used for the upgrade on the B58 to see if it would work directly. The angle of the fuel lines are different, too. Ours are each at about a 45° from each other while the B58 are 180°.
Member
Joined: Jun 2019
Posts: 79
Likes: 5
From: Iran
Glc43
no luck. I’ve reached out to a few places and none have responded. You’d need an adapter harness because the BMW one is different from ours. I figured it out because I’d ordered an extension that’s normally used for the upgrade on the B58 to see if it would work directly. The angle of the fuel lines are different, too. Ours are each at about a 45° from each other while the B58 are 180°.
the only option is aftermarket ones?? Unreasonably expensive !?
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,254
Likes: 171
2002 CL500 to CL55 conversion
I spoke with the folks over at Spool Performance. Swapping from the factory M276 HPFP to the M278 isn’t an upgrade. I’m waiting on some German friends to let me know what they dude in the video was saying about using some other fuel pump. I believe he swapped to the BMW B58 Supra (Bosch BU58 TU) which is a HDP6 type fuel pump that supports ~575HP. The angle of the fittings are different (180 as opposed to 45 degrees like ours). Assuming the threads are the same, I wonder if the connector types are different and if so, how he got around that? If the threads are the same and the connector works with our cars, it would just be a matter of using an adapter to get the lines connected.
https://pumaspeed.co.uk/product-Genu...rade_18846.jsp
This is just me thinking out loud and hoping someone will chime in to help (or let me know why it wouldn’t work).
Ninoi
https://pumaspeed.co.uk/product-Genu...rade_18846.jsp
This is just me thinking out loud and hoping someone will chime in to help (or let me know why it wouldn’t work).
Ninoi
regarding the Supra fuel pump, the video is very difficult to understand. Most high pressure pumps run off of two wires, usually a constant or switched ground, and the other wire being either constant, or switched 12v. Ordering a suitable pigtail and splicing the Supra pump into the engine harness should be the easy part
regarding the angle of the fuel fittings, I do not believe it is a requirement that hard steel lines are used for the fuel lines. Perhaps a hptfe or whatever, flexible/soft high pressure fuel line will allow enough flex in the line to utilize pumps with different angles of fittings
and if the Supra pump is close to fitting, in theory this could open up our options to aftermarket Supra pumps as well
regarding the fuel line fitting. Mercedes will probably use something like a 40 degree flared globeseal type fitting. A competent hydraulic shop, in theory, may be able to fabricate custom hard lines if needed
Senior Member
Joined: Mar 2022
Posts: 342
Likes: 112
2015 C400 4MATIC Palladium Silver Metallic
m278 may not be an upgrade … the amg version of the m278, being the m157 engine platform, may use stronger pumps on something like the e63s for example. I wouldn’t expect e550 pumps to be an upgrade
regarding the Supra fuel pump, the video is very difficult to understand. Most high pressure pumps run off of two wires, usually a constant or switched ground, and the other wire being either constant, or switched 12v. Ordering a suitable pigtail and splicing the Supra pump into the engine harness should be the easy part
regarding the angle of the fuel fittings, I do not believe it is a requirement that hard steel lines are used for the fuel lines. Perhaps a hptfe or whatever, flexible/soft high pressure fuel line will allow enough flex in the line to utilize pumps with different angles of fittings
and if the Supra pump is close to fitting, in theory this could open up our options to aftermarket Supra pumps as well
regarding the fuel line fitting. Mercedes will probably use something like a 40 degree flared globeseal type fitting. A competent hydraulic shop, in theory, may be able to fabricate custom hard lines if needed
regarding the Supra fuel pump, the video is very difficult to understand. Most high pressure pumps run off of two wires, usually a constant or switched ground, and the other wire being either constant, or switched 12v. Ordering a suitable pigtail and splicing the Supra pump into the engine harness should be the easy part
regarding the angle of the fuel fittings, I do not believe it is a requirement that hard steel lines are used for the fuel lines. Perhaps a hptfe or whatever, flexible/soft high pressure fuel line will allow enough flex in the line to utilize pumps with different angles of fittings
and if the Supra pump is close to fitting, in theory this could open up our options to aftermarket Supra pumps as well
regarding the fuel line fitting. Mercedes will probably use something like a 40 degree flared globeseal type fitting. A competent hydraulic shop, in theory, may be able to fabricate custom hard lines if needed
Stock Fuel HPFPs on M278 and M157 are identical (2016 S550 and S63 cross reference the same parts). They have two, that's why (if you'd like to turn the conrods of your M278 into ticking time bombs) they don't need fuel pump upgrades to reach M157 levels of power with just a tune.
