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1998 Mercedes Benz 190e Poor or Difficult Acceleration

Tiny
TAURUS1948
  • MEMBER
  • 1998 MERCEDES BENZ 190E
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
Start ok, idle ok, when accelerating from idle it is no acceleration / hallow.
When full throttle, petal to the floor it takes of to fool RPM ok.
Driving it is difficult, you have to play with the throttle a lot.

Just added fuel antifreeze and drive it 10 m or so not much improvement.
I am in Hamtramck MI and it was pretty cold last night, car is parked outside.
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Saturday, January 17th, 2009 AT 2:33 PM

1 Reply

Tiny
GFIMOTORCARS
  • MECHANIC
  • 673 POSTS
This sounds as though you may have a faulty Mass Airflow Sensor. At idle the sensor is working fine but as soon as you try to accelerate it is loosing it's voltage signal causing unmetered air to enter the engine. Since this component measures the air going into the motor when it fails the Engine Management system has no idea how much fuel to add to the air coming in. Thus causing poor acceleration, decreased fuel mileage, and possible stalls.
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Monday, January 19th, 2009 AT 3:10 PM

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