LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 1983 >> DL 2D Hatchback >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> EGR Function Testing >> System Testing >> EGR System
April 5, 2026: LEMON Manuals is launched! Read the announcement.

EGR System

  1. If both EGR valve and thermo vacuum valve are functioning correctly, apply about 8 in. Hg vacuum to EGR valve with hand vacuum pump. With engine warmed up, either rough idling or engine stall should occur.
  2. If engine idle does not change, check EGR pipe and gas passages for clogging and leaks. Clean or replace if necessary.
NOTE: On 2WD Federal models, engine must have been running 8 minutes or more before performing this test.
scientia non olet · About LEMON Manuals