Hi! I have a second hand 2004 Chrysler PT Cruiser LTD with a Mercedes 2,2 liter CRD diesel, manual 5 -gear, with which I have a problem with excessive exhaust. The engine is 121 hp . The car has gone about 70,000 miles.

When cruising at any rpm (1700, 2000) and in any gear, after giving just a little more gas, my car omits a substantial cloud of dark brownish exhaust.

I have had the car checked at two local dealers. None of them were able to find anything faulty on their computers. They did however change a switch in connection with the brakes and also changed the mass air sensor. None of these things helped. I hope someone can give me a suggestion to what this might come from. Maybe somebody has experienced this in a Mercedes?

Regards, PT-owner, Norway

Awesome!!! A diesel cruiser! My sister would love one of those! Alas, we live in the stinkin' US........

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-Matt

EPA Section 609 Certified MVAC Technician
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Oil Burner Kartel Member #10

Ahh the smell of Diesel Fuel, it's like coffee in the morning!

My Car:

1982 300SD Turbo Diesel (231,500 miles!) RIP

1984 300SD Turbo Diesel Custom (235,500 mi on driveline.) - On Road!!

www.icsrepair.com

embrace the smoke...

A redish brown smoke is an indication of just a little too much fuel for the air available to burn right. So a bad mass airflow sensor is a good guess, but as you said it wasn't the problem. The computer should limit the amount of fuel the engine burns to amount of air brought in. If this car is turbocharged you might have an air leak. Check the EGR system. Excessive EGR will create smoke. Other than that the only thing I can think of is it would be a problem with the injectors injecting too much fuel.

Is it possible the previous owner put a performance chip in it?

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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png

The new Fords, Dodges, and GM diesels do the same thing a WOT.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Can you give me any references to this rrgrassi?
And what is WOT ?

Wide open throttle. Has it been consuming more fuel than it normally does lately or anything?

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1985 CA 300D Turbo , 213K mi

Well, I bought it second hand, so I do not know if it using more than usual. But I measured the consumption to be 0.7 liters per 10 kilometeres (33,6 mpg), which is only slightly above the announced urban consumption (32.8 mpg).

I find it strange in a forum like this that nobody else has had the same experience with the Mercedes 2,2 liter or other diesels!

That's because this forum is predominately American. The only small Mercedes diesels being sold here are in the ML/GL/R/E320 CDI, Mercedes/Dodge/Freightliner Sprinter and Jeep Grand Cherokee CRD. The 2.2L CDI has never been over here in any form.