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Steve
Steve, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 553
Experience:  Air, Drivability, Engines, Electrical
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1995 Mercedes C220: it cuts off if a gas pedal...If..engine runs

Resolved Question:

I purchased 1995 Mercedes C220, 70000 miles about a week ago. The car was owned by older man and it is in very good condition in and out. It run perfect couple days, than engine stalled at idle.The motor starts, but it cuts off
if a gas pedal is released.If gas pedal is released about 10 secend after the start, the engine runs at idle but it is not smouth.When I step on gas pedal and hold it ,the
rev needle starts bouncing up and down. In 1000 RPM range moves up and down beetween 1000-1200. The vacum lines look good and tigh.Electrical wires, cables and
connectors look like new. The throttle linkage is fine. What coud be the problem?
Submitted: 5 years ago.
Category: Mercedes
Expert:  Steve replied 5 years ago.
The Idle air control vale is the most common cause of this problem. However if the car stalled it should have tripped a trouble code in the computer, If you can retrieve this code it will give us somthing more to work with.

Steve
Customer: replied 5 years ago.

The ODB2 code reader shows 0 faults.

A car did not stall. I noticed problem first time, when tried to started it.

Expert:  Steve replied 5 years ago.
"than engine stalled at idle.The motor starts, but it cuts off"

You understand my confusion then?

Steve
Steve, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 553
Experience: Air, Drivability, Engines, Electrical
Steve and 5 other Mercedes Specialists are ready to help you
Customer: replied 5 years ago.

I have been working on the car.I cleaned the butterfly flap in the throttle body with carb. cleaner and replaced a foul filter. Now the engine runs fine at idle, but its speed still bouncing up and down(pulsating), when press the gas pedal, till gets to about 3000 RPM.

Tony

Expert:  Steve replied 5 years ago.
bench test the AFM MITCHELL 1 ARTICLE - H - TESTS W/O CODES 1995 ENGINE PERFORMANCE Mercedes-Benz Trouble Shooting - No Codes - Gasoline

MISFIRE OR ROUGH OPERATION

Test the following:

  • Using a stethoscope, check each injector for clicking at idle.
  • Fuel supply.
  • MAP sensor. MITCHELL 1 ARTICLE - 1994-2000 ENGINE PERFORMANCE Mixture Formation - 202 Chassis

    Missing or sluggishness during acceleration - AF07.11-P-3101AA

    ENGINE 601.912 as of 1.2.93 in MODEL 124 with TRANSMISSION 716, 717

    ENGINE 601.913 as of 1.7.93 in MODEL 202 with TRANSMISSION 717

    Damage code Cause Remedy:
    07 001 53 ARA adjustment path too high. 1 Remove/install injection pump

    Have following work performed by Bosch service
    ra07016010200x
    2 Remove/install ARA solenoid (Y22/3).
    3 Change ARA adjustment path by machining brass washer.
    See table for tightening torque.
    AF07.11-P-3101-01AA
    4 Check and adjust full load quantity on injection pump test bench.

  • Oxygen sensor.
  • Crank angle sensor.
  • Throttle position sensor.
  • Ignition output signal.
  • EGR system.
  • Vehicle speed sensor. MITCHELL 1 ARTICLE - H - TESTS W/O CODES 1995 ENGINE PERFORMANCE Mercedes-Benz Trouble Shooting - No Codes - Gasoline

    LACK OF POWER

    Test the following:

    • Brakes binding.
    • Fuel supply.
    • Emission controls.
    • MAP sensor.
    • Crank angle sensor signal (TD signal).
    • Coolant temperature sensor.
    • Atmospheric pressure sensor.
    • Vehicle speed sensor.
    • EZL/AKR ignition control unit (LH-SFI only).
    • Knock sensors.
    • Fuel injectors.
    • Air intake system.
    • EGR control system.
MITCHELL 1 ARTICLE - 1994-2000 ENGINE PERFORMANCE Mixture Formation - 202 Chassis

Missing or sluggishness during acceleration - AF07.11-P-3101AA

ENGINE 601.912 as of 1.2.93 in MODEL 124 with TRANSMISSION 716, 717

ENGINE 601.913 as of 1.7.93 in MODEL 202 with TRANSMISSION 717

Damage code Cause Remedy:
07 001 53 ARA adjustment path too high. 1 Remove/install injection pump

Have following work performed by Bosch service
ra07016010200x
2 Remove/install ARA solenoid (Y22/3).
3 Change ARA adjustment path by machining brass washer.
See table for tightening torque.
AF07.11-P-3101-01AA
4 Check and adjust full load quantity on injection pump test bench.



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