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Home >> MG >> 1968 >> MGB Base, Not Available Trans >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> S.U. Hp & AUF 300, 301, 303, 306 Electric Fuel Pumps >> Trouble Shooting & Diagnosis >> No Pump Operation When Ignition Turned On

No Pump Operation When Ignition Turned On

When the ignition switch is initially turned ON, one or several pump impulses should occur. If no pump action is noted, proceed to test for current supply at the pump as follows:

  1. Remove the feed wire at the pump terminal and check for current availability with a test lamp or voltmeter.
  2. If current is available at the pump terminal, remove the pump bakelite cover to make a check for contact point continuity.
  3. With the feed wire connected to the pump terminal, short across the points with a jumper lead or suitable conductor. If the pump then makes a stroke, the points are either burned and pitted, dirty, or out of adjustment.
  4. Fold a piece of emery paper and slide it back and forth between the points. Follow this operation by sliding a piece of paper between the points to remove any residue left by the emery paper.
  5. If the pump is now operational but the points are burned or pitted, it is recommended that the pump be removed from the vehicle and new points be installed and adjusted.