PROAMGDRIVER

Hey there Guys I am New to the Forum
I just recently Purchased my E55 about 2 months ago.
Vehicle is a High Milage car, Car has 196,xxx
Ase Certified from Mercedes When i first bought it.

Did a Compression Check everything is Reading Amazing,
Car runs Perfect.

I have the following Mods on the Car.

FTP 180mm Pulley Kit
FTP Trans Cooler
PLM Heat exchanger
JOhnson cm30 pump
Primary and secondary cats Removed
Custom Air Intakes Made by me.
Stock Sparkplugs.
Eurocharged ECU tune.

I just Dynoed my car Yesterday and Car did really good up until 4500rpm and 5500Rpm there is a Weird Dip, The car starts Runing Really Rich, Here is a Pic of the Dyno Sheet.
Id really appreciate if you guys can help me Sort thru this Problem i am having.
Thank You
PROAMGDRIVER

GT-ER

Log your intake air temperature.

PROAMGDRIVER

I am New to Mercedes, How do i Log my Air Intake Temperature?
I am in the Process of Getting NGK LFR7AIX Plugs to See if this Will fix my Problem.

e55amgrocket

The fuel system drops pressure at 4500rpm also. Could have something to do with that. I had the same thing happen to me when Jerry was tuning my car.

PROAMGDRIVER

Hmm So Your saying it has Something to Do with the Tune?
Or the Fuel Pressure Regulator might be taking a Crap?
How did you end up Fixing the Problem?

adianaty

Check your spark plugs, coil packs, and wires especially the primaries. Looks like you are quenching one under heavy load and the secondary is keeping the cylinder alive. Your running rich because your not burning it all...

PROAMGDRIVER

Yeah thats what I am thinking also, I just Ordered NGK LFR7AIX Plugs, i am going to Install them and Re dyno the car, Hopefully this is my problem, Car does Idle Perfect, I didn't detect any bad idle problems so far, my Check engine is On because of the Cats that are deleted.

e55amgrocket

I have been told the plugs don't fire together. If the 2nd plug fire a few degrees after the 1st that's possible but I highly doubt its related to plugs/wires/coil. Not the first time I've seen a graph like that on a E55.

GT-ER

They don't fire together at part throttle. At WOT they do fire together.

PROAMGDRIVER

Hmm I see, Does the E55s have Variable Camshafts? Something Similar to VVTI or VTEC, I have Looked online where they said there is a Computer Controlled Cam phasing gear that works with the Variable Intake Flapper.
I am Quessing Maybe a Sensor or something might be Bad.
Because all 3 pulls Have the Same Graph.

PROAMGDRIVER

I quess my car is Considered Highly Modded So if they do fire together at WOT then The stock plugs might be Struggling with all the Performance upgrades that are on the Car, So the Colder plug might be a Solution Solver.

Gadget

Mine did the same thing with the initial EC tune.

Mine was going richer than 9:1 AFR.

G

e55amgrocket

If your plugs Didnt fire you would know it. It would misfire and most likely go in to limp mode. I'm sure it wouldn't hurt to change plugs and wires but I don't see that being your fix.

Hulk

car is dumping fuel, either you are heat soaking or you need more fuel

if you can get an ice tank or bigger heat exchanger for the heat soak or even ice down the blower between dyno runs

if you need a fuel system contact TTM motorsports for a complete fuel system

GregMB

Huge pulley, and stock exhaust manifolds?
How about a photo of the "custom intake system"?

The engine is either choking on hot intake air, unable to exhale....or both.

Datalogs of IATs would probably tell the tale..... My guess is super high temps killing power.


-G

Gadget

This is exactly how my car behaved on the initial calibration.

It took several different tries to get the one that got the AFR closer to where it should of been. It is most likely a calibration issue.

G

PROAMGDRIVER

Yes Thats Next on my Mod List, I will contact FTP for the Ice Tank, Yes I will consider The Fuel system Also.

PROAMGDRIVER

YEs it is a FTP 180mm Pulley and Yes i do still have the Stock exhuast MAnifolds just a Custom 3'' exhuast NO cats.

PROAMGDRIVER

So Basically i should Contact Jeremy and Tell them to Retune between 4500 and 5500 to correct the Air Fuel, But what if something is actually wrong? Then We dont want to be Over correcting.

Gadget

Exactly.

I also would run a wideband and a scan tool on the car for an extended period of time after the new calibration is loaded so you can be aware of anything weird shows up. That is what I did and discovered intermittent random lean outs.

G

e55amgrocket

Where are you located in VA? It looks like I'm pretty local to you and could help you out with checking things if need be. Let me know

PROAMGDRIVER

That'd be Great Man, im Located Around Tysons Corner Area.

e55amgrocket

I'm down in woodbridge so not to far away. I could meet you tomorrow and data log the car to see what's going on. Let me know.

PROAMGDRIVER

Sounds Good.

djrabbi

Can I join this AMG party maybe on Monday? lol