Having problems with your 1988 Volkswagen Golf ?

Fuel pump is staying on instead of swiching off and keeps sending fuel to cylinders all the time on a m2 golf 1.8 freg

Posted / edited by AnonymousUser on : 13-08-2018

Answers :

\012When the ignition switch is turned ON, the Vehicle Control Module (VCM) turns ON the in-tank fuel pump. The in-tank fuel pump remains ON as long as the engine is cranking or running and the VCM is receiving the distributor reference pulses. If there are no reference pulses, the VCM shuts off the fuel pump within 2 seconds after the ignition ON or the engine stops. Should the fuel pump relay or the 12 volt relay drive from the VCM fail, the fuel pump receives a supply current through the oil pressure switch backup circuit. The fuel pump test terminal is located in the driver’s side of the engine compartment. When the engine is stopped, applying the battery voltage to the test terminal can turn on the fuel pump. DIAGNOSTIC AIDS An inoperative fuel pump relay can result in long cranking times. The time necessary for the oil pressure to reach the pressure required in order to close the oil pressure switch and supply the necessary current for the fuel pump causes the extended crank period. If the fuel pump relay circuit checks out OK.The fuel pump and its connections needs to be checked.\012Remove fuel tank filler cap. Listen for fuel pump operation noise at fuel tank filler. Fuel pump should operate for 2 seconds after ignition switch is turned on. If fuel pump operates as specified, fuel pump is okay. If fuel pump does not operate as specified, go to next step. \0122. Turn ignition switch off. Remove rear seat or trunk floor to gain access to fuel pump connector. Disconnect fuel pump connector. Disconnect PGM-FI main relay connector. Connect a fused jumper wire between PGM-FI main relay connector FUEL PUMP fuse side terminal and fuel pump side terminal. \0123. Turn ignition switch on. Using a voltmeter connected to ground, check for battery voltage at fuel pump harness side connector. If battery voltage is not present, check harness between fuel pump and FUEL PUMP fuse. Repair as necessary. If battery voltage is present, check fuel pump ground. Repair as necessary. If ground is okay, replace fuel pump.\012Thanks. keep updated for any more query.you can rate this solution and show your appreciation.
Fuel pump relay is stuck on.
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\015\012I checked the labor and it's about 1 hour to do it, but they don't have any electrical schematics published for your vehicle on my online resources.
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\015\012The part costs $5.52 to $37.72 depending on where you order it online.
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\015\012If the fuel pump relay were operating correctly, turning the ignition key off would turn the fuel pump off.
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Repair Help & Product Troubleshooting for 1988 Volkswagen Golf

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