Diesel Data: Automotive Repair

DR-32B Checking Idle Mixture


This test must be performed with engine at normal operating temperature.
1. Remove heated air sensor-to-three way connector hose, then attach propane supply hose.
2. Meter propane flow until maximum RPM is achieved. Models with 4-97/1.6L, engine speed should increase 150---250 RPM. Models with 4-135/2.2L, engine speed should increase 25---125 RPM.
3. If increase in engine speed is satisfactory, proceed to Step C.
4. If increase in engine speed is unsatisfactory, adjust as per Propane-Assisted Idle Set Procedure.