KleemannE55

Hey guys,

I recently purchased an 2003 E55 AMG, 100k, Kleemann K4 package (640hp/670tq)..

I drove the car home from Michigan to MD 500+ miles with no issues , map sensor code came on halfway thru after getting gas .. But cleared it the next day & it never came back .. There is currently no codes ! The car ran great pulle hard & ran like it has 640hp.. Then one day I noticed the car felt slower, still fast but a lot slower.. So I went out to make sure I wasn't just used to the power..

Ran a couple of cars on the hwy that I had run previously a week before, I was winning the week prior , now I'm losing by a lot..

The car is slower consistently, not just after a few hard pulls it's always slower .. I made some pulls with another 03 E55 220k with full exhaust & tune .. He pulled me the same night I re ran those cars..

I swapped to a new ic pump , check the fuse & the relay .. Still missing power.. I hear the chirp sometimes so I know the s/c working..

I'm going to have it put on STAR , & get a printout within a few days..

Please help me!! There are no close shops that dyno/fix Mercedes near by!

KleemannE55

Also had hooked up a nice scanner from my friends job checking iat's , it was around 70* out & my iat's were around 100* cruising && a 30-75ish pull I was at 125, iirc.

T9ja

Welcome to the forum. I always test out my car on the drag strip to see what difference/improvement has taking place, especially when adding some mods. I thought my car was running perfectly also, not until I took it down to the track, and find solution to the problem. You will surely get the help you needed on this forum. What part of MD do you live?

shardul

iTrader: (1)

check the MAP values to see if you are making boost.

KleemannE55

I live near Rockville MD

T9ja

I live down in Clinton. Drove the car down from Indiana when I bought the car back in March. Wish you the best.

KleemannE55

Will I be able to see map values/boost reading with a STAR diagnostics

shardul

iTrader: (1)

boost will be in HpA i think in DAS.

KleemannE55

Sorry , I'm not familiar with the terms hPa & das

stvbreal

Lower boost maybe boost leak, IC piping come loose somewhere?

KleemannE55

Thats possible I haven't checked

But it would most likely throw a code right

stvbreal

It may. I've owned a few boosted cars and when the connection in the IC piping comes loose somewhere there's substantial power loss of course but I never got a CEL but this was lower. I did have the Upper IC Pipe come loose and that did throw a CEL.

shardul

iTrader: (1)

these cars have a air to water system so if a IC pipes comes loose you will loose liquid not the charged air

stvbreal

Shows how much I know about E55s. I'll keep quiet now.

HeissRod

KleemannE55

Taking my car to MB Dealership tomorrow, they're going to complete a STAR diagnostics..

I'm praying they see something odd that can help lead me to my issue, fingers crossed.

Thanks for all your help so far guys

KleemannE55

The dealership found nothing wrong. I give up.

G_Money

maybe a dumb suggestion but how are your air filters/rest of the intake looking

E55Freak

i was also going to suggest a few minor things...

did you replace plugs/coils?
did you bleed your IC system when you replaced it?
have you checked/replaced your S/C belt? possible slippage?
Do you have an aftermarket HE? not sure if K4s come with a larger one...

KleemannE55

Yes ic system is bled. Belt is fine. I have an aftermarket HE.

Unhooked battery to reset ecu.. Car felt faster but I could be wrong ..

MindBend

I'm not too far from you (close to Lancaster, PA). If you get up my way, be happy to take a look. I'm not an "expert" but have owned three of these beasts and they've schooled me with their temperamental ways!

KleemannE55

There was a rough bucking/thudding at idle last night when I was sitting at a light..

No CEL tho..

Gadget

Do you have the cats still installed?

Does it idle rough?

Have you checked the IAT when boosting?

Have you done a compression test?

G

KleemannE55

The 2 rear cats are still installed..

It doesn't idle rough except twice when it bucked/thudded a few times at idle, then went back to normal smooth idle after a few seconds of bucking.

Yeah IAT's look normal at WOT.

I have not done a compression test, I'm scared too.

KleemannE55

Took the car out with a buddy , made a pull.. Went home disconnected the battery.. Went back out made a pull, ESP malfunction .. My belt came off..

Could this have been my power loss issue the whole time?