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Home >> BMW >> 1987 >> 535is Automatic, 4HP22H >> Repair and Diagnosis >> Engine Performance >> System >> MOTRONIC CEC System >> Testing >> Test 1: Fuel Pressure >> Fuel Pressure Too Low

Fuel Pressure Too Low

Check for fuel feed restriction. Check for kinked, bent or clogged fuel line. Repair or re-route as needed. Check fuel filter for excessive restriction and replace if dirty. Clean filter screen in fuel intake. Check pressure regulator operation and replace if defective.