E55K AMG Supercharger cuts out quickly

[chocolatemonk]

I hope this makes sense, but this is my first Kompressor Mercedes and I have found after only a few fairly quick blasts along dual carriageways for example the car loses power until it is 'rested' for a few mins and then the power is resumed. Is it normal to happen to quickly?

Thanks

[christer]

chocolatemonk said:

Is it normal to happen to quickly?

haha

[SLacKer]

chocolatemonk said:

I hope this makes sense, but this is my first Kompressor Mercedes and I have found after only a few fairly quick blasts along dual carriageways for example the car loses power until it is 'rested' for a few mins and then the power is resumed. Is it normal to happen to quickly?

Thanks

Do you have a faulty supercharger coolant pump? The symptons sound about right and the answer is no to the question. Fuel permitting you should be able to hoof it all day long.

Did you get it from a dealer recently, if so any warranty. Easily fixed by the way but a pain all the same.

[chocolatemonk]

christer said:

chocolatemonk said:

Is it normal to happen to quickly?

haha

Did I actually write that ??!! LOL

[chocolatemonk]

SLacKer said:

chocolatemonk said:

I hope this makes sense, but this is my first Kompressor Mercedes and I have found after only a few fairly quick blasts along dual carriageways for example the car loses power until it is 'rested' for a few mins and then the power is resumed. Is it normal to happen to quickly?

Thanks

Do you have a faulty supercharger coolant pump? The symptons sound about right and the answer is no to the question. Fuel permitting you should be able to hoof it all day long.

Did you get it from a dealer recently, if so any warranty. Easily fixed by the way but a pain all the same.

Thanks Slacker I will get it checked out, I did read on a US forum that additional cooling can be bought for the superchargers on these cars as they do lose power sometimes, but would imagine the climate they are dealing with is much warmer. Not looking forward to summer in it, if it is not improved. Thanks for your advice.

[AMGMark]

Charge air circulation pump - common problem, car will feel much stronger once you get it sorted...

Edited by AMGMark on Sunday 2nd May 19:53

[chocolatemonk]

AMGMark said:

Charge air circulation pump - common problem, car will feel much stronger once you get it sorted...

Edited by AMGMark on Sunday 2nd May 19:53

Hi Mark, is that the same as the IC pump, that seems to be mentioned a lot on US forums?

[PROPOP]

yep... this one http://cgi.ebay.co.uk/Johnson-CM30P7-1-CM30-Pump-S...

[chocolatemonk]

Perfect, thanks for your help, I will order the Johnson one off Ebay and get it fitted.

[AMGMark]

Commonly referred to as an IC pump but Charge air circ pump is the correct name. The older pump was not upto scratch and so many owners went with the US Johnson pump but the newer Mercedes bosche pumps are much better - if you get it replaced these days it's better to go with the Merc pump IMO...either way your car will feel much better, good luck.

[chocolatemonk]

Hi, thanks for your help...so far. I got the Johnson CM30 pump off ebay from CKS performance and had it fitted by my local Merc specialist, went to try it yesterday evening, and no improvement

The specialist can't seem to think of any other causes for the problem, and it is difficult for them to simulate on roadtest for obvious reasons :wink:

Any more help would be appreciated!

[SLacKer]

chocolatemonk said:

Hi, thanks for your help...so far. I got the Johnson CM30 pump off ebay from CKS performance and had it fitted by my local Merc specialist, went to try it yesterday evening, and no improvement

The specialist can't seem to think of any other causes for the problem, and it is difficult for them to simulate on roadtest for obvious reasons :wink:

Any more help would be appreciated!

Sorry to hear that. Are there no codes recorded to give a clue? Also how about the fuel supply, how long ago was the filter changed? If the kompressor decides to shutdown I would have thought a code would be recorded to indicate the condition.

I did read a while back about an E55 with power loss being caused by the fuel tank being low and a vacuum restricting the flow of fuel. I don't think it is a common fault but you never know.

If all else fails go to a Merc dealer and bend over.

[chocolatemonk]

Problem solved, took the technician on roadtest with me and took the diagnostic computer as well, intake temp was running at over 70c when gentle cruising and was over 100c within seconds of using the supercharger.

I remarked that I would of thought the Johnson pump should of helped just a little bit, he replied that he was surprised the whole car was not running cooler and was not sure how the auxilary pump made much difference to the 'charger

Turns out they did not realise the E55 had a seperate cooling pump for the supercharger and had replaced the auxilary pump on the main cooling system

Anyway... pumps swapped over, free of charge and problem solved...it's like a completely different car...Happy Days

[chocolatemonk]

Would just like to add the service from the independant was 1st class,and I would highly recommend them.They have done lots of work on the car and my previous post does not detract from my recommendation.

[SLacKer]

Great. The sc pump failure strikes again. Next mod is to weld the right peddle to the floor