SL55/63/65/R230 AMG: Lazy Supercharger
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2004 SL55 AMG Kompressor
Lazy Supercharger
So last fall, my supercharger got lazy and would work when it wanted to. This car is nothing without that supercharger. I checked the forums, and replaced the I/C coolant pump. no change. it still works when it feels like it..what's my next step?
#2
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Source a means of which you can monitor the live OB2 data. This can either be with a STAR machine or even a cheap scan tool with data stream capabilities. Have a friend watch your IAT and see how high they get under WOT. There could be a multitude of reasons your IAT is getting out of control, In which case the ECU disengages the supercharger clutch.
You could also have mechanical problems with the supercharger clutch itself but start with the IAT.
You could also have mechanical problems with the supercharger clutch itself but start with the IAT.
#7
My pump died after 10K miles. The brushes were totally shot. What a piece of crap.
The relay had higher than normal contact resistance. I burnished the contacts with a special tool. I would replace the relay if you cannot test it properly. It takes a special ohmmeter.
The relay had higher than normal contact resistance. I burnished the contacts with a special tool. I would replace the relay if you cannot test it properly. It takes a special ohmmeter.
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#8
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2004 SL55 AMG Kompressor
Busa - Where is the relay located? I assumed it had one, but my **** poor wiring diagrams show a direct loop from PCM to clutch...the way it was rapidly cycling in the fall made me think of a failing relay...
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2004 SL55 AMG Kompressor
That relay was for the pump, I thought there might have been one for the supercharger itself...It's been working great the past few runs...had her up to 230km and was pulling good....maybe an air bubble or that old pump was actually bad....I'll keep an eye on er...