W210 Mercedes E55 AMG Project
The car started and idled the smoothest it ever has with the new sensor, but upon a few wide open throttle runs the car misfired and hit limp mode yet again.
Star showed misfires on cylinders 1 and 3 consistently, so the next remedial and routine parts to change will be the the coils and leads.
After the fault finding was done, I took the car for an engine steam and basic clean to make good of what was another disappointing day in the hunt for optimum Kleemann performance.

More updates, photos, and videos to follow.
Last edited by M3RC3D3SE55AMG; Apr 9, 2015 at 08:04 PM.
The result? Still misfiring! The misfire now however is down to just cylinder 3.
No more parts are to be switched out for now, as when we removed the spark plug from cylinder 3 we found moisture on it, not in the form of fuel, but we think water.
The car is officially off the road while we check for more clear signs of water in the engine system, cylinders for compression, and condition of the cylinder heads. Most likely the heads will be removed and go away for machining regardless of further findings. The valves and seats etc will all be cleaned up too while the heads are off, and then we will bolt it all back together with a full set of new gaskets to ensure it's air/water tight again.




More updates, photos, and videos to follow.
Last edited by M3RC3D3SE55AMG; Apr 9, 2015 at 08:04 PM.




is there any codes appears..? did you see what's the AFR after all ignition replaced..??, are two O2 sensors works..???
ZAYED,,
The Best of Mercedes & AMG
AFR was where Kleemann said it needed to be. I don't have the numbers to hand but I'll get them from the garage and post them for you.
The O2 sensors are both brand new and working fine. We checked the car via Star for these faults with no codes shown.
I'll also try and get the misfire code for you.
P0300
P0302
P0303
P0304
They were read to me just now over the phone from a regular diagnostic system, not a Star system.
The garage also informed me that they have checked the coolant system for excess CO2, the test came back all clear. They also tested the supercharger for compression, that too is ok. Now they're checking all the spark plugs and will compression test each cylinder.
All these tests are to confirm whether or not we have a weak or leaking head gasket obviously. We're really confused about what the problem could be after all new parts being fitted!
Last edited by M3RC3D3SE55AMG; Apr 2, 2015 at 10:29 AM.




did they install MAF resistor..?, what Kleemann says about this..??
ZAYED,,
Would you agree with that Zayed?




fuel pressure with boost/AFR, mas voltage should not go above 4.85 volts),,
is the car running the same misfire with unpluged EGR..??
ZAYED,,
"As far as I know, your car does not run the EGR system, as it's an older model with a secondary air pump that is currently disconnected. As of right now the main thing to find out with the new setup is whether we need to use the MAF resistor or not, I am waiting to hear from Kleemann"
What do you make of that?
Last edited by M3RC3D3SE55AMG; Apr 3, 2015 at 02:41 PM.
"As far as I know, your car does not run the EGR system, as it's an older model with a secondary air pump that is currently disconnected. As of right now the main thing to find out with the new setup is whether we need to use the MAF resistor or not, I am waiting to hear from Kleemann"
What do you make of that?
My gut tells me that you DO need the MAF resistor, but of course it would be good to hear this directly from Kleemann.
Thanks for the consistent updates, and I wish you all the best!
Last edited by M3RC3D3SE55AMG; Apr 5, 2015 at 12:45 PM.




bad fueling mixture could cause plugs to be worn-out quickly..!,
*important to know what's the AFR vs lean/rich...!!
ZAYED,,
After pulling out the plugs, they are totally worn out, in less than 1000 KM's!
Compression tests showed approximately 180 psi (12.4 bar) across all cylinders, which is solid.
Air/Fuel ratio is floating around 12 as it should be.
We have now put in a set of Bosch Platinum's, and guess what?.... NO MISFIRES!
Now I'm not going to get ahead of myself here. I will run the car for a couple of days and monitor the numbers. Kleemann recommend the Bosch F5DC for this setup, so I need to check if it's ok to continue running these Bosch FGR8DQP's instead. If not, I would like to run a Bosch F5DC equivalent from the platinum range, which features the 4 electrodes. I feel they will be more reliable due to their gap setup from the manufacturer.
So, as of now, the car is pulling VERY well throughout the rev-range/gears. For the first time I'm able to clearly hear the supercharger spinning up, and it's a combination of relief, excitement, and nerves I'm feeling. I can't help but think the car is all of a sudden going to start misfiring again.
I have no doubt that many of you reading the thread will be saying "why didn't you check the plugs in the beginning?". Well, it was actually one of the first things we checked, but that was two months ago now!
More updates, photos, and videos to follow.
Last edited by M3RC3D3SE55AMG; Apr 9, 2015 at 08:05 PM.




*Not prefer Bosch 4 Electrodes, Iridium's NGK/Denso are the best..

ZAYED,,
I'll get the iridium plugs as you recommend Zayed. Do you have the part numbers?




but if you want to go with aftermarket:-
NGK #: "IFR5D10" or "IFR6D10"
Denso #: "IK22/5310"
ZAYED,,








