Fuel Pump Feedback

1990 Pontiac Grand Prix STE, 3.1 VSECTION Fuel Pump Feedback

On some models, the fuel pump circuit between the relay and fuel pump is monitored by the ECM. This enables the ECM to determine when the fuel pump relay is energized and voltage is being delivered to the fuel pump. A failure in this monitored circuit will result in the setting of a related trouble code in ECM memory.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.