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Christiane 7/16/2012

1991 Mercedes Benz 300SL Base 6 Cyl 3.0L


After not having driven the car for 2 days, it starts fine but within 10 minutes, it starts to hesitate and cuts off.

After having not driven the car for a couple of days, the car starts fine, drives fine, bu then within 10 minutes it starts to hesitate and on occasions it will shut off. If I am on a hill it is even more difficult to get it to accelerate. It hesitates, jerks and cuts off, which is dangerous.

1 Answer


Jimm 7/17/2012

Possible Causes of Engine Hesitation or Stumble:

Dirty fuel injectors (cleaning the injectors often fixes this).
Dirty / clogged air filter element (change the air filter)
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil


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