cm60k

I ordered E55K injectors, not arrived yet, decided to install SLK/CLK55 injectors with new rail for now,, i well install them & let you guys know......





ZAYED,,

DRBC43AMG

Why the two pipes and coupling?

503C43 ////AMG

I can only assume the coupling is to loop his fuel rail and eliminate possible starvation in the end of the rails, especially in the #8 cylinder, during high rev situations.

As far as why he has two fuel rail I couldn't tell you

DRBC43AMG

I wonder if you could add a piece of flex fuel pipe in between both ends of the rail. That way you would work the rail in a loop with fuel arriving in one place as is now.

cm60k

As jason stated,,

this coupling for starvation between 2 points,, not that important, just an idea,, no puzzle about 2 rails, just i got a spare......!!

ZAYED,,

cm60k

You read my mind,, im thinking to do that with a spare one........

ZAYED,,

DRBC43AMG

I'm wondering again and I don't really know the fuel system on our 43's. Ok high pressure pump in the rear right end of the vehicule driving fuel under pressure toi the injector rail. Now is the pressure constant at all time when in operation? Does it increase with revs to force more gas to the injectors? Is there a low pressure return to the fuel tank to bring back fuel and eventuel bubbles?

nd4spd13

Nice! Always a safe plan following the E55k guys. Been following that forum a lot lately. Now you just need a supercharger with a HUGE pulley to make it something to actually worry about

cm60k

Good ques.,,

I think the fuel pressure is not constant at all time,, depend of the fuel activity combustion & density & temp. of the vapour goes & come from the Tank,,

the return line comes from a filter to the tank directly, the "Regeneration Valve", which sucking the petrol vapour, that builds in the tank, when driving

& open the throttle, the "Regeneration Valve" opens & the vapour well sucked by the "Charcoal filter", that of course controlled by the ECU,, if the vapour

is much more, it well goes to the intake manifold to burning it off,, this is the info. i got,,

pls. correct me if im wrong......

ZAYED,,

cm60k

Hahaa,, agree with you of course......

ZAYED,,

503C43 ////AMG

Not so sure you need a supercharger and pulley to get the starvation in cylinder #8. I have had #8 shut down a couple times during WOT in the past 2 years I have owned my C43.

My C43 sounds like a Subaru when it kicks the 2 cylinders off

nd4spd13

Really?! Wow. I wouldn't have expected that from a car as it was from the factory. I've only heard about it with the E55 guys on a couple of the highly modded ones, and it destroys the engine when it happens

503C43 ////AMG

While not highly modded my car is not "as it was from the factory". When it happened, mine shut off 2 cylinders and sounded like a Subaru. The 2 times it has happened I pulled over and shut the car off, started it back up and all was well. It threw a CEL as well which indicated a misfire in cylinder #8.

I could be wrong about it being due to starvation but the 2 times it happened I was WOT.

nd4spd13

Ah, for some reason I read your first post as if it had happened 2 years ago. But still, I'm surprised. What mods did you have when it happened?

503C43 ////AMG

1st time:
Phenolic spacers, UD pulley kit, secondaries deleted, resonator deleted

2nd time:
Phenolic spacers, UD pulley kit, secondaries deleted, resonator deleted, Renntech CF airbox

plugs,wires, and MAF have been changed within the last year and a half or so

cm60k

Its happen to me sometimes either, with a normal drive,, im not sure if the car goes lean or rich....?, as you said i pulled over & start again, everything

goes well....!!, i may doubt about the ECU or O2 sensor.....!!>>??

ZAYED,,

cm60k

Im already installed a fuel rail & injectors,, soo smooth now, fast starting, good response......,,

i may had a bad injectors before.....?!?

ZAYED,,

320 dreamer

what size injectorsa does the c55 use? the c32/slk32 and the e55 use the same 480cc injectors.
if you go bigger you will need to scale the injectors before driving the car

cm60k

The injectors which i removed from early (W202 C43/ W210 E55), #: "113 078 01 49", Bosch #: "0280 155 839", which is "217cc", but the set i installed

from late W210 E55 & C/CLK/SLK55, after 2001 #: "113 078 03 49" or "113 078 00 23", Bosch #: "0280 156 074", which is "283cc",,

as i know the C/SLK32 & E55K uses the same injectors, #: "112 078 03 49" or "113 078 01 23", Bosch #: "0280 156 072", which is "396cc"......

http://users.erols.com/srweiss/tableifc.htm

ZAYED,,

cm60k

I had a strange problems, about "5" months ago,, it could be same as yours,, when the car goes hot, started to loosing power &

feeling that the car goes to the lean point,, i replaced the (MAF-Fuel pump-"2" Fuel pump Relays-CPS sensor-Cam sensor-Spark

plugs),, with NO luck,, but after the long damn suffering,, i found the trick,, I disconnect the O2 sensors plugs & closed the EGR

valve, and using the car about "4" days, waaaaw, the performance is soooo great, the car is not hesitate or loosing power like

before with no CELL,, i thought its from the fuel side,, but i was wrong..?!?,, unfortunately Star didn’t help about the accurate

effective about the O2 sensors & the mechanical side of the EGR valve,, good idea for anyone guys to try to disconnect the O2

sensors for a while, to see if they in good condition or not,, anyway, i can’t leave the car without the O2 sensors, for that, im

thinking to put a new NGK/NTK wideband O2 sensors,, what do you think guys.......??

ZAYED,,

sickc43owner

Great info, I made the mistake if swapping on my c43 intake and injectors after installing the 55 engine, noticed an extended crank and misfire on cylinder 6 under hard acceleration. I felt something was missing, read this posting after investigating injectors, installed the 55 injectors - damn what a differance!!