Supercharger problem... should I be concerned??
10-20-2009, 03:53 AM
#1
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C32 AMG
Supercharger problem... should I be concerned??
Need some advice...
I was driving on the interstate probably going 70/75mph the other day and tried to pass a truck, mashed on the gas pedal expecting to bolt past as the AMG normally does.
To my concern nothing happened... meaning (I think) my supercharger did not engage, acceleration and torque was minimial. I tried it speeding up with the same disappointing results. A few miles later, the car started performing as it should.
I exited from the interstate and tried speeding up on city and neighborhood roads to determine if it only happens at a certain speed limit. It seems like the problem is intermittent.
Needless to say, I am worried as hell. The only differential that I know of is the grade of gas my gf used when she filled up. Instead of using premium she used a lesser grade. I don't know if this would cause the problem but I went an bought a gas treatment and filled up with premium.
For the most part, it seems as if it is performing as it should but now I'm paranoid... Is there any maintenance that I should perform and/or is this a sign of future problems? Any insight ya'll can provide is much appreciated!
I was driving on the interstate probably going 70/75mph the other day and tried to pass a truck, mashed on the gas pedal expecting to bolt past as the AMG normally does.
To my concern nothing happened... meaning (I think) my supercharger did not engage, acceleration and torque was minimial. I tried it speeding up with the same disappointing results. A few miles later, the car started performing as it should.
I exited from the interstate and tried speeding up on city and neighborhood roads to determine if it only happens at a certain speed limit. It seems like the problem is intermittent.
Needless to say, I am worried as hell. The only differential that I know of is the grade of gas my gf used when she filled up. Instead of using premium she used a lesser grade. I don't know if this would cause the problem but I went an bought a gas treatment and filled up with premium.
For the most part, it seems as if it is performing as it should but now I'm paranoid... Is there any maintenance that I should perform and/or is this a sign of future problems? Any insight ya'll can provide is much appreciated!
10-20-2009, 03:59 AM
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03 g35 coupe...........02 c32 Sold
get some octane booster and make sure all the regular is gone...if the problem continues, then check to see if your intercooler pump went out. But ask c32used...he got super flamed for using 87..lol. But yeah our cars are very sensitive to anything below 91.
10-20-2009, 04:01 AM
#4
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The intercooler water pump on your C32 is starting to go. The supercharger did not engage because internal air temperatures got too hot with the pump not circulating. There's a thread on this forum for DIY repair of the pump. I've also made a thread on benzworld that's very thorough, and complete with photographs. Dealership will charge you around $700 to fix this, and DIY will only cost $150, or less... 
http://www.benzworld.org/forums/w203...placement.html
http://www.benzworld.org/forums/w203...placement.html
10-20-2009, 04:17 AM
#5
its possible the lower octane gas has SOME effect but it shouldnt retard the timing as much as it sounds on your car to where the supercharger wouldnt engage. it sounds like a bad IC pump and your supercharger cut out when the IATs got too high.
10-20-2009, 04:50 AM
#6
Senior Member
Sounds like an IC pump to me too. If you really think it might be the gas wait till you fill up again make sure you use premium. Or you could take the car out and hit the gas a few times and if the acceleration gets real weak again probably the IC pump. After you have been running the car (long enough for the pump to activate) you can also tell by listening near the right front tire for a humming noise that lasts about 5 seconds after you shut the engine off, recruit a friend if you need to. No noise=no pump. Pretty easy fix to do yourself, most members upgrade to a johnson cm30 pump due to the poor reliability of the stock units.
Many threads out there covering the subject.
Many threads out there covering the subject.
Last edited by Panzerknacker; 10-20-2009 at 04:53 AM.
10-20-2009, 02:34 PM
#7
Super Member
sorry to say...it is your ic pump. I have the same symptoms......it is intermittent and when the car cools down a bit, it performs like it should. I ordered a pump from eurocharge and will install this w/e....hopefuly
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10-20-2009, 10:18 PM
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C32 AMG
Don't be so quick to assume it's the IC pump. I had no problems, and read on here that I should upgrade to a johnson CM30. So I did. A couple months after install I developed your problem of the supercharger being intermittent. My solution? The IC pump FUSE blew on me. It's in the fuse box in the trunk of the car on the left. I believe position 6. It should be a 7.5amp fuse.
Check that before you drop $150 on a pump.
Hope this helps.
Check that before you drop $150 on a pump.
Hope this helps.
10-20-2009, 10:27 PM
#9
Don't be so quick to assume it's the IC pump. I had no problems, and read on here that I should upgrade to a johnson CM30. So I did. A couple months after install I developed your problem of the supercharger being intermittent. My solution? The IC pump FUSE blew on me. It's in the fuse box in the trunk of the car on the left. I believe position 6. It should be a 7.5amp fuse.
Check that before you drop $150 on a pump.
Hope this helps.
Check that before you drop $150 on a pump.
Hope this helps.
I dumped $220 to replace I/C pump and found out after the problem showed up its the fuse...I wonder if my other pump was faulty at all
Last edited by c32used; 10-20-2009 at 10:36 PM.
10-21-2009, 12:26 AM
#10
(me)
10-21-2009, 11:12 PM
#12
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10-21-2009, 11:20 PM
#13
Basically it works as follows the SC turns on then like within a minute it doesn't turn on and it does this repeatedly thru any trip...the cause if its the fuse..once the SC heats up signal is sent to IC pump to activate but since blown fuse it don't turn on causing the safety guidelines of the ecu or sam to take over thus it won't fire up the SC...once its cool enough(low IATs) it lets SC turn on then it repeats everytime it heats up. If you are experencing anything similar well check the fuse in trunk fuse block.
to take over thus it won't fire up the SC...once its cool enough(low IATs) it lets SC turn on then it repeats everytime it heats up. If you are experencing anything similar well check the fuse in trunk fuse block.
10-21-2009, 11:29 PM
#14
The intercooler water pump on your C32 is starting to go. The supercharger did not engage because internal air temperatures got too hot with the pump not circulating. There's a thread on this forum for DIY repair of the pump. I've also made a thread on benzworld that's very thorough, and complete with photographs. Dealership will charge you around $700 to fix this, and DIY will only cost $150, or less...
http://www.benzworld.org/forums/w203...placement.html
http://www.benzworld.org/forums/w203...placement.html
10-23-2009, 05:25 AM
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SLK 32
May also be the temperature sensor, mine was gone at 14K km.......
And after 90K km I have still the first IC pump in...
Greetings from Switzerland,
Hans
SLK32, smaller SC pulley, SL55 intake
And after 90K km I have still the first IC pump in...
Greetings from Switzerland,
Hans
SLK32, smaller SC pulley, SL55 intake
11-03-2009, 10:09 AM
#17
Junior Member
Don't be so quick to assume it's the IC pump. I had no problems, and read on here that I should upgrade to a johnson CM30. So I did. A couple months after install I developed your problem of the supercharger being intermittent. My solution? The IC pump FUSE blew on me. It's in the fuse box in the trunk of the car on the left. I believe position 6. It should be a 7.5amp fuse.
Check that before you drop $150 on a pump.
Hope this helps.
Check that before you drop $150 on a pump.
Hope this helps.
can you explain a little on where the fuses are? is it in the side access panels in the trunk? i don't see any fuses in my 2003 slk32.
Thanks!
11-03-2009, 01:44 PM
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2003 porsche 996 turbo
the pump fuse for the slk32 is located in the fuse box in the engine compartment on the drivers side. if you look under the lid the numbered diagram will tell you which fuse it is. on mine it is a 5 amp fuse which blows frequently. the c32 upograded to a 7.5 amp which i replced my 5 amp with and hasnt blown since. if you cant find it hollar and ill get the fuse number for you
11-03-2009, 01:45 PM
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Silver 02 C32 & White 05 CLK500
I would love to know where these fuses are on a c32 as well (where exactly in the trunk, and where up front?). I just replaced my oem ic pump with a cm30, and still having acceleration issues, but my supercharger does not turn off, nor did it turn off with the old bosch ic pump.
11-03-2009, 02:33 PM
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2003 porsche 996 turbo
+1
I would love to know where these fuses are on a c32 as well (where exactly in the trunk, and where up front?). I just replaced my oem ic pump with a cm30, and still having acceleration issues, but my supercharger does not turn off, nor did it turn off with the old bosch ic pump.
I would love to know where these fuses are on a c32 as well (where exactly in the trunk, and where up front?). I just replaced my oem ic pump with a cm30, and still having acceleration issues, but my supercharger does not turn off, nor did it turn off with the old bosch ic pump.
11-04-2009, 01:34 PM
#21
Junior Member
the pump fuse for the slk32 is located in the fuse box in the engine compartment on the drivers side. if you look under the lid the numbered diagram will tell you which fuse it is. on mine it is a 5 amp fuse which blows frequently. the c32 upograded to a 7.5 amp which i replced my 5 amp with and hasnt blown since. if you cant find it hollar and ill get the fuse number for you
Thanks a lot!
11-26-2009, 03:11 AM
#22
Junior Member
the pump fuse for the slk32 is located in the fuse box in the engine compartment on the drivers side. if you look under the lid the numbered diagram will tell you which fuse it is. on mine it is a 5 amp fuse which blows frequently. the c32 upograded to a 7.5 amp which i replced my 5 amp with and hasnt blown since. if you cant find it hollar and ill get the fuse number for you
Thanks!
07-06-2010, 12:11 PM
#25
Super Member
Maybe because the pump is on it's way out?
Fuses are simple resistors put in place to protect each of their respective components. If the water pump is starting to bind (because they've been known to literally break apart) then there would be greater load on that circuit thus tripping the fuse. Just a thought...
Fuses are simple resistors put in place to protect each of their respective components. If the water pump is starting to bind (because they've been known to literally break apart) then there would be greater load on that circuit thus tripping the fuse. Just a thought...
