[mpower1201]

Please I need help car shook when started car in morning but next day started fine and driving fine I have 2003 MB C230K coupe. Just wondering why it did this? I hope its nothing bad

 

[zeet]

Any codes stored? Any check engine light?

 

[mpower1201]

no check engine light on and computer says no malfunctions,I thought it might be gas

 

[zeet]

Decent first guess. You have been buying top-tier premium, right? It's so little of a cost difference from unbranded gas and can avoid problems. Might throw in some HEET in case it's water in the gas, or Techron in case it plugged an injector.

 

[mpower1201]

If it was mass air flow sensor it would say malfunction right?

or anything else in the engine compartment right?

 

[2002c230]

Actually it wouldn't, and I had the same issue. Cleaning the MAFS seemed to correct the problem. How many miles does your coupe have on it? My MAFS finally gave out at 120k miles. All the signs are there of bad MAF, and still no CEL... Have a new one on order right now from Autohausaz. $250 dollars...

 

[mpower1201]

It has 56,000 miles on it

I just got it

 

[mpower1201]

where is mass airflow sensor located

Is it on the front or towards the back right side?

 

[Buellwinkle]

On your car it's behind the air filter box on top, center. Search the forum for pictures. Just don't confuse 2002C230 with your, different engine, different MAF.

What more likely happened is when you take short trips, the engine doesn't get a chance to warm up, it leaves moisture deposits in the combustion chamber and next time you start it you may see the water vapor in the exhaust and the engine may stumble a bit, all normal. Or it could be CPS about to go out, time will tell.