2003 C32 Power Loss on Acceleration / Rough Idle
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2003 C32 AMG
2003 C32 Power Loss on Acceleration / Rough Idle
Hello,
My car has developed some issues which I am having no luck narrowing down.
Any help would be much appreciated! I have a friend who is a mechanic and we can fix whatever the issue is, just having a hard time deriving what exactly it is.
Miles: 160K
Year: 2003
Model: C32 AMG
Problems:
Extremely rough idle and
If i try accelerate any harder than what you would do say in a grocery parking lot, all power is lost, CEL comes on and blinks at me and engine shakes and wants to stall. If i stop and turn the car off and back on the engine goes back to what how it was before i accelerated and caused the cut out.
History of repairs:
IC Pump replaced at 80K miles
All plugs new
Error Codes:
P0120 Throttle/Petal Position Sensor/Switch A Circuit Malfunction
P0172 System too Rich (Bank 1) )
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0305 Cylinder 5 Misfire Detected
P0306 Cylinder 6 Misfire Detected
P0300 (Random Misfire)
Thanks again for any help.
My car has developed some issues which I am having no luck narrowing down.
Any help would be much appreciated! I have a friend who is a mechanic and we can fix whatever the issue is, just having a hard time deriving what exactly it is.
Miles: 160K
Year: 2003
Model: C32 AMG
Problems:
Extremely rough idle and
If i try accelerate any harder than what you would do say in a grocery parking lot, all power is lost, CEL comes on and blinks at me and engine shakes and wants to stall. If i stop and turn the car off and back on the engine goes back to what how it was before i accelerated and caused the cut out.
History of repairs:
IC Pump replaced at 80K miles
All plugs new
Error Codes:
P0120 Throttle/Petal Position Sensor/Switch A Circuit Malfunction
P0172 System too Rich (Bank 1) )
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0305 Cylinder 5 Misfire Detected
P0306 Cylinder 6 Misfire Detected
P0300 (Random Misfire)
Thanks again for any help.
#4
Super Member
It's most probably one of the things that you mentioned and least likely to be something that affects one bank such as a fried O2 sensor, plug wires, coil packs, or a gasket leak.
He's also too rich on bank 1, so it's probably good idea to change both primary O2 sensors anyways...
Last edited by Dingleberry; 05-09-2011 at 06:06 PM.
#6
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C32/C55 AMG
I hope it's not your cams. Be very careful how you drive it, because you may blow the engine. I'm right at 150k miles and I'm hoping that the engine will last well over 200k miles. Do you have any performance mods? Check out this thread: https://mbworld.org/forums/c32-amg-c...2002-c32s.html
#7
Hello,
My car has developed some issues which I am having no luck narrowing down.
Any help would be much appreciated! I have a friend who is a mechanic and we can fix whatever the issue is, just having a hard time deriving what exactly it is.
Miles: 160K
Year: 2003
Model: C32 AMG
Problems:
Extremely rough idle and
If i try accelerate any harder than what you would do say in a grocery parking lot, all power is lost, CEL comes on and blinks at me and engine shakes and wants to stall. If i stop and turn the car off and back on the engine goes back to what how it was before i accelerated and caused the cut out.
History of repairs:
IC Pump replaced at 80K miles
All plugs new
Error Codes:
P0120 Throttle/Petal Position Sensor/Switch A Circuit Malfunction
P0172 System too Rich (Bank 1) )
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0305 Cylinder 5 Misfire Detected
P0306 Cylinder 6 Misfire Detected
P0300 (Random Misfire)
Thanks again for any help.
My car has developed some issues which I am having no luck narrowing down.
Any help would be much appreciated! I have a friend who is a mechanic and we can fix whatever the issue is, just having a hard time deriving what exactly it is.
Miles: 160K
Year: 2003
Model: C32 AMG
Problems:
Extremely rough idle and
If i try accelerate any harder than what you would do say in a grocery parking lot, all power is lost, CEL comes on and blinks at me and engine shakes and wants to stall. If i stop and turn the car off and back on the engine goes back to what how it was before i accelerated and caused the cut out.
History of repairs:
IC Pump replaced at 80K miles
All plugs new
Error Codes:
P0120 Throttle/Petal Position Sensor/Switch A Circuit Malfunction
P0172 System too Rich (Bank 1) )
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0305 Cylinder 5 Misfire Detected
P0306 Cylinder 6 Misfire Detected
P0300 (Random Misfire)
Thanks again for any help.
DO NOT TRUST PRE-GAPPED PLUGS! WHILE BEING SHIPPED MAY GET OUT OF GAP.
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#8
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2003 C32 AMG
Update: Replaced IAT - And did more controlled test
So i replaced the IAT prior to reading last post, no biggie it looked in bad shape any how. I then did a controlled test as best as i could.
Accelerating gently we were doing good, shifting clean , and steady until
my speed got to around 50-60 miles an hour.
Then the standard choke up and loss of power and CEL turns on and blinks.
Additional point of note, I am listening hard to hear any sembalance of my supercharger whistling and hear absolutely nothing through out the entire trip of 10 miles.
What do yall think the next test should be to further narrow in on the problem?
Much obliged.
Rudamentz
Accelerating gently we were doing good, shifting clean , and steady until
my speed got to around 50-60 miles an hour.
Then the standard choke up and loss of power and CEL turns on and blinks.
Additional point of note, I am listening hard to hear any sembalance of my supercharger whistling and hear absolutely nothing through out the entire trip of 10 miles.
What do yall think the next test should be to further narrow in on the problem?
Much obliged.
Rudamentz
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2003 C32 AMG
I hope it's not your cams. Be very careful how you drive it, because you may blow the engine. I'm right at 150k miles and I'm hoping that the engine will last well over 200k miles. Do you have any performance mods? Check out this thread: https://mbworld.org/forums/c32-amg-c...2002-c32s.html
#12
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C32 AMG
My C32 that is currently in the shop had the same symtoms your car has.
First, I started noticing a rough idle while not moving in drive.
After this persisted for a few weeks, One day while accelerating hard getting on the freeway. I threw a CEL that stared out by blinking and then went solid.
My code reader came back with:
P0300 Multiple Cyl Misfires
P0301 Cyl 1
P0302 2
P0303 3
P0304 4
P0306 6
(Research told me blinking CEL with regards to P0300 means the Misfire Monitor detected more than a 10% variance in the RPM between the cylinders) Prolonged, this can damage you cats.
Right away, im thinking why would it be misfiring on both heads?
After reading the forums with regards to similar issues, my first plan of attack was to change the plugs and wires. This however, made no difference to the idle and CEL.
Next was the fuel filter. I figured it needed to be changed anyway since my car has 110,000 miles on it. After the replacment: No difference, idle was still rough and CEL came on with 75%+ throttle.
I also noticed in gear while stationary, that the exhaust didn't sound quite right. It sounded like it was panting.
The next day, I ran a compression test and all the cylinders they were all between 145-155 PSI. Except #5 was at 50 PSI
The next step was to put oil in the cylinder and see how high it would raise.
That brought it up to 90 PSI. I knew right away it was the piston
After I found out this great bit of info, I took the car to my mechanic and he tore the heads off and found they were not the real issue.
Next, he pulled the motor and low and behold, the compression ring on #5 was cracked all the way down. (Ill post pics when I get the piston from the mechanic) He also said this was the reason why I was noticing oil dripping down from in front of the transmisson and the rear main. The blow-by from the piston back into the crankcase was causing an oil leak.
Keeping the long story somewhat short, they had to order a M112K piston from Germany since they are nowhere to be found from MBZ stateside. (That took 7days to arrive) and he found another piston that needed a new set of rings so he ordered one of those too.
Also he had the valves grinded along with a new water pump.
If all goes to plan I should get my car back tomorrow!!!!!
Please dont ask how much this all is going to cost me!! Lol
I recommend putting blocks in front of the rear wheels and listening to the exhaust while in gear. Check for any panting noises
PS: Put the E-Brake on really well
First, I started noticing a rough idle while not moving in drive.
After this persisted for a few weeks, One day while accelerating hard getting on the freeway. I threw a CEL that stared out by blinking and then went solid.
My code reader came back with:
P0300 Multiple Cyl Misfires
P0301 Cyl 1
P0302 2
P0303 3
P0304 4
P0306 6
(Research told me blinking CEL with regards to P0300 means the Misfire Monitor detected more than a 10% variance in the RPM between the cylinders) Prolonged, this can damage you cats.
Right away, im thinking why would it be misfiring on both heads?
After reading the forums with regards to similar issues, my first plan of attack was to change the plugs and wires. This however, made no difference to the idle and CEL.
Next was the fuel filter. I figured it needed to be changed anyway since my car has 110,000 miles on it. After the replacment: No difference, idle was still rough and CEL came on with 75%+ throttle.
I also noticed in gear while stationary, that the exhaust didn't sound quite right. It sounded like it was panting.
The next day, I ran a compression test and all the cylinders they were all between 145-155 PSI. Except #5 was at 50 PSI
The next step was to put oil in the cylinder and see how high it would raise.
That brought it up to 90 PSI. I knew right away it was the piston
After I found out this great bit of info, I took the car to my mechanic and he tore the heads off and found they were not the real issue.
Next, he pulled the motor and low and behold, the compression ring on #5 was cracked all the way down. (Ill post pics when I get the piston from the mechanic) He also said this was the reason why I was noticing oil dripping down from in front of the transmisson and the rear main. The blow-by from the piston back into the crankcase was causing an oil leak.
Keeping the long story somewhat short, they had to order a M112K piston from Germany since they are nowhere to be found from MBZ stateside. (That took 7days to arrive) and he found another piston that needed a new set of rings so he ordered one of those too.
Also he had the valves grinded along with a new water pump.
If all goes to plan I should get my car back tomorrow!!!!!
Please dont ask how much this all is going to cost me!! Lol
I recommend putting blocks in front of the rear wheels and listening to the exhaust while in gear. Check for any panting noises
PS: Put the E-Brake on really well
#13
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C32 AMG, 2007 Chev Lumina SS, 2006 ML 320cdi
Sounds like my trouble. I don't know how you get away with replacing a piston and a few rings? This has happened twice to me and both times my engine had to be removed and sent off to an engineering firm who confirmed the damage to the cylinder walls required machining and an entire set of oversize pistons and rings (complete rebuild basically). The quote was so high that it worked out cheaper to buy a used engine from a wreck. Let me save you some time and money - sell your car immediately after it has been repaired! My second motor blew 4 months after I had it installed by AMG - exactly the same thing again. The biggest worry is that no-one can tell me why this has happened twice. My car ran standard mods - pulley, tune, exhaust, filters. My C32 is almost finished getting it's 3rd engine installed, but will not be coming home from AMG as it has to be sold on their floor because I can no longer afford to keep paying like this. Best of luck, but listen to someone who knows serious car pain - sell it.
#14
Senior Member
Hello,
My car has developed some issues which I am having no luck narrowing down.
Any help would be much appreciated! I have a friend who is a mechanic and we can fix whatever the issue is, just having a hard time deriving what exactly it is.
Miles: 160K
Year: 2003
Model: C32 AMG
Problems:
Extremely rough idle and
If i try accelerate any harder than what you would do say in a grocery parking lot, all power is lost, CEL comes on and blinks at me and engine shakes and wants to stall. If i stop and turn the car off and back on the engine goes back to what how it was before i accelerated and caused the cut out.
History of repairs:
IC Pump replaced at 80K miles
All plugs new
Error Codes:
P0120 Throttle/Petal Position Sensor/Switch A Circuit Malfunction
P0172 System too Rich (Bank 1) )
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0305 Cylinder 5 Misfire Detected
P0306 Cylinder 6 Misfire Detected
P0300 (Random Misfire)
Thanks again for any help.
My car has developed some issues which I am having no luck narrowing down.
Any help would be much appreciated! I have a friend who is a mechanic and we can fix whatever the issue is, just having a hard time deriving what exactly it is.
Miles: 160K
Year: 2003
Model: C32 AMG
Problems:
Extremely rough idle and
If i try accelerate any harder than what you would do say in a grocery parking lot, all power is lost, CEL comes on and blinks at me and engine shakes and wants to stall. If i stop and turn the car off and back on the engine goes back to what how it was before i accelerated and caused the cut out.
History of repairs:
IC Pump replaced at 80K miles
All plugs new
Error Codes:
P0120 Throttle/Petal Position Sensor/Switch A Circuit Malfunction
P0172 System too Rich (Bank 1) )
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0305 Cylinder 5 Misfire Detected
P0306 Cylinder 6 Misfire Detected
P0300 (Random Misfire)
Thanks again for any help.
Last edited by francoisisp; 05-12-2011 at 10:38 AM.
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2003 C32 AMG
Update and Another Question
Hello alls!
Replaced Wires, Replaced IAT, Replaced MAP.
All codes gone, 1 new code has appeared and idle very lumpy
P2016-002 Self-Adaptation of mixture formation for right bank cylinders is at limit value (at part load). Enleanment below permissable limit (P0172)
Additionally I never hear my supercharger anymore at all.
I feel like its not working.
Any ideas or suggestions much appreciated as always.
P.S. the MAP sensor is a P.I.T.A i tell ya.
Replaced Wires, Replaced IAT, Replaced MAP.
All codes gone, 1 new code has appeared and idle very lumpy
P2016-002 Self-Adaptation of mixture formation for right bank cylinders is at limit value (at part load). Enleanment below permissable limit (P0172)
Additionally I never hear my supercharger anymore at all.
I feel like its not working.
Any ideas or suggestions much appreciated as always.
P.S. the MAP sensor is a P.I.T.A i tell ya.
#16
Hello alls!
Replaced Wires, Replaced IAT, Replaced MAP.
All codes gone, 1 new code has appeared and idle very lumpy
P2016-002 Self-Adaptation of mixture formation for right bank cylinders is at limit value (at part load). Enleanment below permissable limit (P0172)
Additionally I never hear my supercharger anymore at all.
I feel like its not working.
Any ideas or suggestions much appreciated as always.
P.S. the MAP sensor is a P.I.T.A i tell ya.
Replaced Wires, Replaced IAT, Replaced MAP.
All codes gone, 1 new code has appeared and idle very lumpy
P2016-002 Self-Adaptation of mixture formation for right bank cylinders is at limit value (at part load). Enleanment below permissable limit (P0172)
Additionally I never hear my supercharger anymore at all.
I feel like its not working.
Any ideas or suggestions much appreciated as always.
P.S. the MAP sensor is a P.I.T.A i tell ya.