1985 Mercedes Benz 300td smog

Tiny
MAXMARGAR.COM
  • MEMBER
  • 1985 MERCEDES BENZ 300TD
Engine Performance problem
1985 Mercedes Benz 300td Two Wheel Drive Automatic 150000 miles

exorst pipe bleck smog-only in low speed?
Saturday, May 30th, 2009 AT 8:38 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Sounds like its running rich

Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode
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Saturday, May 30th, 2009 AT 5:16 PM

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