s65 cylinder misfire please help!
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From: SoCal
a few AMGs
s65 cylinder misfire please help!
Been going on for a while.. cant find the problem maybe you guys can help. Every time i accelerate fast car gets all rough, turn it off and back on it becomes smooth again, until i press the gas again pretty hard. Diagnosis shows that cylinder 2 is misfiring. Any one know what can be the cause? Any help will be great.
thanks
thanks
Newbie
Joined: Sep 2009
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From: Seattle, wa
1995 C36 AMG
possibly ignition coil? not familiar with that motor but if it is just coil on plug just swap that coil to a different cylinder and then clear your codes go drive it and see if the misfire follow that cylinder.
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From: USA
2018 S63, lowered
Nope- there's 2 coil packs on the 65, one for each side of the motor.....when 1 coil goes out, the whole "coil pack" will go bad, thus you will be hitting on 6 cylinders. This happened to me 2 weeks ago and this is exactly what my tech told me.
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From: REHOBOTH BEACH DE
88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
Been going on for a while.. cant find the problem maybe you guys can help. Every time i accelerate fast car gets all rough, turn it off and back on it becomes smooth again, until i press the gas again pretty hard. Diagnosis shows that cylinder 2 is misfiring. Any one know what can be the cause? Any help will be great.
thanks
thanks
My G55K has a similar problem but it indicates #4 cylinder misfire ( code PO304 ).
Occurs, not always, only on hard acceleration.
You'll feel the misfire, engine may stumble, but shutting down and restart eliminates problem.
There was a service bulletin issued in late 06 to resolve the problem on the G55K.
Ed A.
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From: SoCal
a few AMGs
Thanks for your replies! Busa did you change one of your coil packs? How much was it. And RBYCC after that ecu flash from the dealer it stopped misfiring? Also are are the s600 coil packs the same?
Thanks!
Thanks!
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From: REHOBOTH BEACH DE
88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
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From: Illinois
GL550, C55, 335i Coupe, vintage Mustang
Depending on the mileage of the car, it may be due for spark plugs. You will need 24 plugs plus 24 insulators that need to be replaced in the coil towers. It can be done in your garage if you are handy, but you do need to unbolt(not remove) the intercoolers and swing them out of the way and then you have to remove the $$$ coil packs out without damaging them. If it needs a coil, they are about $1000 each+-. If your car has an early ignition module(black plastic top) it should be thrown out as it is probably junk too. I have seen them cause a misfire on only 1 cylinder even though it is what charges the coil. Also, be careful because the coil primary voltage from the ignition module is 250V DC.
Nick
Nick
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Your worst nightmare...
Had the exact same issue on my CL65, had both sides of the engine bank misfiring, so had to replace both coil packs and while I was it replaced the ignition pack as well. it is tough to diagnose either the coil pack or the ignition box since you can't really pin point which is bad. Since I was selling the car I did not want the buyer to have headaches so ended up replacing everything. Each coil pack was roughly 1200 x2= 2400 + ignition box 750. it was a hefty bill but car felt like new.
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From: Chicago
GL550
Had the exact same issue on my CL65, had both sides of the engine bank misfiring, so had to replace both coil packs and while I was it replaced the ignition pack as well. it is tough to diagnose either the coil pack or the ignition box since you can't really pin point which is bad. Since I was selling the car I did not want the buyer to have headaches so ended up replacing everything. Each coil pack was roughly 1200 x2= 2400 + ignition box 750. it was a hefty bill but car felt like new.
what is the life expectancy on these things? I have seen a lot that went bad.
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Your worst nightmare...
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From: Chicago
GL550
also, other than misfiring, is there different symptoms that would lead one to believe something is wrong?
MBWorld Fanatic!
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Your worst nightmare...
Member
Joined: Dec 2009
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From: Chicago
GL550
does anyone have the maintenance schedule for this car? when is one theoretically supposed to replace the spark plugs. i just bought my car and actually still waiting delivery. it has 36k on the clock so i guess i would like to make sure i am getting everything done on time.
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From: USA
2018 S63, lowered
does anyone have the maintenance schedule for this car? when is one theoretically supposed to replace the spark plugs. i just bought my car and actually still waiting delivery. it has 36k on the clock so i guess i would like to make sure i am getting everything done on time.
Last edited by Busa196; Dec 22, 2009 at 10:16 AM.
