Mercedes, kompressor, ROUGH start

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  #1  
Old 09-28-06, 04:38 PM
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Mercedes, kompressor, ROUGH start

Mercedes Benz SLK230 Kompressor 1999

Said car has a very rough start and some white smoke (not a lot) after being parked overnight. This lasts for a few seconds. Ambient temp doesn't matter, engine temp does, when warm no problem.
However several, times when starting rough,(within seconds)I will shut it off and restart it, Starts normal.

No check engine light. On the computer temp sensor is within range. Have had the air intake bypass valve out and cleaned as best we could. All plugs have been changed, some looked fouled.
Feels very similar to a miss fire, but no lasting signs.

(New dealer installed super charger last year)

Any ideas? Thanks Lee.
 

Last edited by lectriclee; 10-01-06 at 06:34 PM.
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  #2  
Old 09-28-06, 05:41 PM
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The easist and cheapest thing you should first due is bring your car to Autzone and have them hook up there OBDII code reader to your computer to see if your car is giving them codes. It's free. Even though your CEL is not on, you can still have codes. White smoke out the tail usually means a fuel issue. Also, did this start to happen after you changed your plugs?
 
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Old 09-28-06, 06:50 PM
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Thanks for the reply.

The smoke arrived with the problem,after cleaning the AIBV, I then changed the plugs.

I did use the automotive code computer,A friend has a garage, but neither of us are that familiar with the Benz. No codes recorded.
 
  #4  
Old 09-28-06, 08:22 PM
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I hate to disagree, however, white smoke out the tail is oil, fuel is black. Depending on the number of miles on the vehicle, if it has high mileage it is usually worn valve guides if the smoke is there when cold and goes away until it set overnite or sets long enough to cool down. Have a nice day. Geo
 
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Old 09-29-06, 03:28 AM
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Also, white smoke is indicative of 1) incomplete combustion or 2) coolant.
 
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Old 09-29-06, 05:45 PM
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Thanks for the help.

48,000. Miles.

I "lean" Towards an incomplete combustion.
Back to the "air intake bypass valve" .
Oil= blue, No?
Fuel=Black?
White= coolant?

Should I invest? $500.00 ( new AIBV)


But Why? Once started the car goes like a R--ed A-e.
No delay on the GO.Or warm.
 
  #7  
Old 09-29-06, 06:03 PM
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Drive it, save the $500 until something goes wrong. Have a nice day. Geo
 
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Old 09-29-06, 07:15 PM
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Lightbulb

Originally Posted by geogrubb
Drive it, save the $500 until something goes wrong. Have a nice day. Geo
WOW!! Love your logic.
All I got to say about that!!!
 
  #9  
Old 09-29-06, 09:56 PM
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Originally Posted by lectriclee
WOW!! Love your logic.
All I got to say about that!!!
I'm old and cheap, however, I did retire a 54. Have a nice day. Geo
 
  #10  
Old 09-30-06, 04:41 AM
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Smile

I'm cheap too, But with this car, I have found it only gets MORE
exspensive if I wait.

I do appreciate the help, Thanks Geo.
 
  #11  
Old 09-30-06, 12:06 PM
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Being a Kompressor its probibly got a supercharger right? I have worked on some Mazda cars that have problems with the supercharger seals leaking a bit. They have the same complaint that you have.
 
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Old 09-30-06, 07:42 PM
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Right, the Kompressor is a type of super charger.

so, you would recomend the seals?

MB dealer, replaced the super charger last year.

These seals, is it a major job?
Are there any other perifials to be worried about?

I have the lift and tools.

Thanks.
 
  #13  
Old 09-30-06, 09:42 PM
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don't really know on the MB but on the mazda we just replaced he supercharger assembly. couldn't service the seals seperatly
 
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Old 10-01-06, 07:14 AM
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Thanks, I''l see what we can find.

Trying to avoid the dealer.
 
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