Power Loss not Intercooler Pump
Thread Starter
Senior Member
Joined: Jan 2011
Posts: 360
Likes: 1
From: SoCal
2018 GLE350
Power Loss not Intercooler Pump
So I've noticed recently my C32 is starting to bog out when driving around town. Especially when driving "normal" (IE Not zooming around town)
Symptoms
1. Seems to happen most when driving at any speed below 60 MPH (city driving)
2. Seems to be more noticeable when it's hot outside -though it still happens a night when it's cool so I could just be imagining things.
3. If I'm going up a hill and I press the gas about 35%, car will bog out until I press the gas more. The speedometer gauge will drop until I press the gas about 75% or more. Then the car down shifts and it's fine.
The symptoms are similar to when my Intercooler pump died. However, I just replaced it about 6 weeks or so ago and I can hear it. It seems to be working. I don't think the supercharger is shutting down.
The best way I can describe the issue in a nut shell - Imagine driving a manual transmission in 3rd gear then jumping to 5th. The car would obviously bog down and run like crap until you went back into the correct gear. The symptoms are sort of similar. It's almost as if the gets confused and doesn't know what gear to use. Keep in mind this happens when I've already got decent speed going towards the hill. (These are not large hills mind you)
Any ideas where to start looking?
Symptoms
1. Seems to happen most when driving at any speed below 60 MPH (city driving)
2. Seems to be more noticeable when it's hot outside -though it still happens a night when it's cool so I could just be imagining things.
3. If I'm going up a hill and I press the gas about 35%, car will bog out until I press the gas more. The speedometer gauge will drop until I press the gas about 75% or more. Then the car down shifts and it's fine.
The symptoms are similar to when my Intercooler pump died. However, I just replaced it about 6 weeks or so ago and I can hear it. It seems to be working. I don't think the supercharger is shutting down.
The best way I can describe the issue in a nut shell - Imagine driving a manual transmission in 3rd gear then jumping to 5th. The car would obviously bog down and run like crap until you went back into the correct gear. The symptoms are sort of similar. It's almost as if the gets confused and doesn't know what gear to use. Keep in mind this happens when I've already got decent speed going towards the hill. (These are not large hills mind you)
Any ideas where to start looking?
Last edited by Budget Baller; Sep 9, 2011 at 05:26 PM.
Thread Starter
Senior Member
Joined: Jan 2011
Posts: 360
Likes: 1
From: SoCal
2018 GLE350
Coolant level looks good. I had the manifold off just recently while changing out the gaskets and everything looked good. Though I may take it apart tonight and have another look.
Thanks for the suggestions, open to whatever is thrown at me.
Thanks for the suggestions, open to whatever is thrown at me.
Senior Member
Joined: Oct 2007
Posts: 369
Likes: 17
From: SO CAL
AMG
surely take another look because mine started leaking out no where it wasnt verry noticeable as far as coolant lever going down drasticaly.
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Thread Starter
Senior Member
Joined: Jan 2011
Posts: 360
Likes: 1
From: SoCal
2018 GLE350
@C_DirtyTwo no I haven't hooked up the OBD meter. Didn't even consider the gas padel. Any way to tell for sure?
@loudandheard How would I know if there is air still in the line? I assumed we'd gotten most of the bubbles out. When we first changed the pump the car kept saying the coolant was low. We "pumped" the lines and pushed out quite a few air bubbles. Then coolant error disappeared and it's been fine every since. So I don't THINK there is air in the lines, but I could be wrong.
@loudandheard How would I know if there is air still in the line? I assumed we'd gotten most of the bubbles out. When we first changed the pump the car kept saying the coolant was low. We "pumped" the lines and pushed out quite a few air bubbles. Then coolant error disappeared and it's been fine every since. So I don't THINK there is air in the lines, but I could be wrong.
Thread Starter
Senior Member
Joined: Jan 2011
Posts: 360
Likes: 1
From: SoCal
2018 GLE350
Monday I'm going to hook it up to an OBD and see if it's throwing any codes.
Thread Starter
Senior Member
Joined: Jan 2011
Posts: 360
Likes: 1
From: SoCal
2018 GLE350
Thread Starter
Senior Member
Joined: Jan 2011
Posts: 360
Likes: 1
From: SoCal
2018 GLE350
Heres the thing though. When the car bogs down, I'm pretty sure the SC is still on because I can hear the whine. The whine is so quite though it's not often that I hear it anyway.
Thread Starter
Senior Member
Joined: Jan 2011
Posts: 360
Likes: 1
From: SoCal
2018 GLE350
Though we're not 100% sure yet, we're thinking it may be the SC.
Yesterday the cars temp was about 97 (read via the hidden AC menu) Today the cars temp was around 89-90ish and the car seemed to be running better. (It wasn't nearly as hot outside today as it was yesterday)
Does anyone know if there is a way to read how hot the SC is getting?
Yesterday the cars temp was about 97 (read via the hidden AC menu) Today the cars temp was around 89-90ish and the car seemed to be running better. (It wasn't nearly as hot outside today as it was yesterday)
Does anyone know if there is a way to read how hot the SC is getting?
