Engine Shutter/shake
I have a 2005 C230k with 58,000 miles. It runs great with no problems and no codes.... however. The only time this issue happens is when the a/c is:
A. First turned on and starting up/engaging while in park, but clears up after a few moments.
B. When a/c is on and the car is put in reverse or drive while braked.
C. When stopped at a stoplight or such with car in gear.
Symptoms:
In conjuction with any of the above the engine drops a couple hundred rpms and then the engine/car immediately begins to shutter/shake with the belt periodically screaching at points. This will continue until the brake is released and/or gas is applied. It seems to me that the a/c compressor is of course putting extra strain on the engine as usual, but the engine isnt recognizing this and compensating as it should. Could it be a vacum issue, sensor or the possibility that the compressor is failing. If the a/c is off the car runs 100% fine with no issues. Any help, thoughts or links to a similar thread would be great. Please let me know if there may be any additional info about the car needed. Thanks much

BTW... Serp belt has been replaced, a/c charge is good and throttle reset preformed.
In my opinion if the belt screeches when you engage the A/C, the A/C is placing a high amount of load on it. Sounds as if the A/C is binding or seizing.
If you place other auxilliary load on the engine eg all lights & turning the wheel without the A/C selected , does the engine faulter ?
I suggest removing the belt & feeling how freely the A/C pully spins when selected..Any bearing or binding noise ?
Did the symptoms occur after the A/C was serviced? . Maybe it was over gassed or too much oil added ?
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I just spent so much on new tires and breaks and am going to be bringing it in for my Cam sensor recall and I'm afraid the dealer is going to try to compensate for free work by saying I need this this and this done, "that will be $2000" bs
Has anybody heard of a recall or open service campaign for this issue?
I think from what I have read in these forums that ally of people have this issue.
I found this online http://www.ehow.com/about_6522620_ca...or-pulley.html
What do u guys think?
Last edited by yeabrah; Sep 8, 2011 at 11:02 PM. Reason: I added a link
When the problem first occurred the car was losing power while driving but I simply neglected it, after a few months or so one day when I tried to start the car the engine started to shake and backfire (not sure if I'm using the right term here). Long story short, in the end had to replace the fuel pump (the root cause), CAT converter, and the O2 sensor. Cost me around $5000 in total.
I have a 2005 C230k with 58,000 miles. It runs great with no problems and no codes.... however. The only time this issue happens is when the a/c is:
A. First turned on and starting up/engaging while in park, but clears up after a few moments.
B. When a/c is on and the car is put in reverse or drive while braked.
C. When stopped at a stoplight or such with car in gear.
Symptoms:
In conjuction with any of the above the engine drops a couple hundred rpms and then the engine/car immediately begins to shutter/shake with the belt periodically screaching at points. This will continue until the brake is released and/or gas is applied. It seems to me that the a/c compressor is of course putting extra strain on the engine as usual, but the engine isnt recognizing this and compensating as it should. Could it be a vacum issue, sensor or the possibility that the compressor is failing. If the a/c is off the car runs 100% fine with no issues. Any help, thoughts or links to a similar thread would be great. Please let me know if there may be any additional info about the car needed. Thanks much

BTW... Serp belt has been replaced, a/c charge is good and throttle reset preformed.
Last edited by tjts1; Aug 30, 2017 at 12:10 PM.




I still get a split second of rough idle when coming to a stop quickly while the AC is on, but haven't bothered to find the cause. Car doesn't stall or anything.
Last edited by slammer111; Aug 30, 2017 at 06:33 AM.








