Fikse

do the intercooler pumps go bad altogether? or can they go slowly or have decreased abilities?

about two weeks ago in 96 degree weather I ran the car from 40-120mph and the supercharger shutdown, car had no power for about 5 minutes, then everything was fine....

the other day, in cooler weather, 85 degrees, I ran it from 40-120mph and it shut down again...

does this point to the IAT's and bad cooling? the car is fine with shorter sprints, 0-80mph, etc.... but longer sprints with more load and the car dies powerwise...

thanks!

rflow306

I think it's definitely your pump. The current weather will definitely make the car feel slower, but if the supercharger shuts down your pump needs to be replaced.

mbamg06e55

Yeah they can either simply fail all together or over time. I just had mine replaced, and I could slowing over time feel the power going away, until final failure.

Get the thing in and have it replaced if under warranty with the new upgraded bosch unit.

tigerlam92

The symptom is high IAT prompting the ECU to shut down the supercharger. I had the same symptom and for a while. I was consistantly testing the power and doing WOT at different time with different settings (traction control on or off, manual, S, C, on the roll, off the line, etc) to see if there is power or not. LOL Sometimes it's fast sometimes it's a dog and usually right after one WOT it's down. When the dealer replaced my IC pump with the new version all is good. I think I am going to throw in my Johnson pump that has been sitting in the closet for almost a year now.

The root cause is usually a bad IC pump but not always the case. Another root cause may be that the standard intercooler setup is not sufficient and the IC pump is functioning as it was design and functioning properly. If it is the second case because there is substantial mods done, then improving the intercooling system is the solution not throwing in another stock IC pump into the stock insufficient intercooling system.

Fikse

I've been at the same mod level for over a year with no issues until now. I'll take it to RENNtech for their intercooler upgrade kit and report back. I wasn't sure if the pump issues was a yes/no it's working or not deal....

poormanAMG

What kind of IAT's does it take before the supercharger doesn't function?

JoeJErnst

I think it shuts off somewhere around 200 deg F.

E55Greasemonkey

Somewhere around/above 180F , I'm guessing

poormanAMG

I took my S55 out to check IAT's last week because it seemed like it was down on power at the top end. Here's my IAT's were getting over 200F! But manifold pressure still stayed positive, so the supercharger wasn't disengaged even above 200F. That's downright scary that they let it get that high from factory. So I ordered the upgraded Bosch 010 pump and installed it yesterday and also split the system while I was at it. Power is all back and then some! IAT's never rose above 125F, even with back to back pulls. Much better.

AudiologyVA

Did you hardwire the Bosch pump to run constantly? I'm looking to do this on my S55 at some point, probably during summer time.

poormanAMG

No, I did not. I also don't plan on doing any racing with it other than the occasional drag race, so the way it's wired up works fine for me as is so far. We'll see after I take it to the track if I change my mind or not.

equitiesguy

The pumps run non-stop as soon as the supercharger engages the first time. The supercharger goes on clutch at 1-3 MPH and reengages accordingly, but the pump runs continuously until the engine is turned off. Lot of work for not much benefit.

AudiologyVA

And since I have a fixed pulley, theoretically speaking my ic pump engages upon startup perhaps? Maybe not worth the time and effort to hardwire my pump.

equitiesguy

It's been a while. I know there's a magnetic clutch engagement signal. If you've done away with the magnetic clutch, and it engages at all, it should conform to the same rules. There's a separate signal in the ME to engage at 40% engine load as well. If you're interested I can pull up the actual function from the ME for you.

E55Greasemonkey

This is 100% correct. (and verified)

AudiologyVA

I have not deleted the magnetic clutch, at least as far as I can visually tell. Quite honestly I did not install the FSP myself, but rather an independent MB shop. Please enlighten a newbie what is an ME? A google search refers it to a "Mercedes me" app, something in reference to a remote vehicle management access. I suspect you're referring to something else.

coupesedan

ME refers to motronic ecu. me 2.8

AudiologyVA

Thanks for the clarification

equitiesguy

Sorry. BMW forum refer to it as DME (digital motor electronics), and I’ve stuck with that. Mercedes folks usually question DME so I’ve dropped the acronym to ME (motor electronics). Motor electronic control unit is probably the most appropriate term which would be MECU?

all referring to the computer for the engine.

JoeJErnst

FYI, you can also get the pump to turn on by quickly stabbing the throttle to WOT while in park. When the pedal hits the WOT button on the floor it turns the pump on, and it will stay on. I used to do this while sitting in the staging lanes at the dragstrip.

SICAMG

Also if it is VERY cold out side the pump will turn off when the engine see's idle any time.

JoeJErnst

True. Or if it is hot outside but you have a Killer Chiller. ;-)

SICAMG

Hey Joe what lower pulley is that on the engine in the picture ?

tlambert

ATI Super Damper. Check out his info on the link below.

https://stumptownbenz.com/custom-ati...-for-the-m113/

JoeJErnst

And this one talks a little about the 188mm pulley: https://stumptownbenz.com/pinning-th...ercedes-m113k/