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Home >> Mercedes Benz >> 1986 >> 190E 102.985, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Cis-E System >> Component Testing >> Fuel Delivery & System Pressures >> Visual Check - Fuel Leak
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Visual Check - Fuel Leak

  1. Remove air cleaner and check for any visible fuel leaks. Remove fuel pump relay from relay board. Bridge terminals No. 7 and 8 long enough to establish fuel pressure. Push airflow sensor plate down manually.
  2. Uniform resistance should be felt throughout travel after slight amount of free travel. No binding should be felt if sensor plate is released quickly. If upward movement of sensor plate is slow, resistance from control piston closely following adjusting lever should be felt. No binding should be evident.
  3. Push airflow sensor plate completely down and hold there briefly. Slight fuel see page past control piston is acceptable. If no fuel leaks have been found, go to next test.
Fig 1: Mercedes-Benz 190E Fuel Distributor Use these ports for delivery volume testing procedures.
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