DFI Chart B1 - Restricted Exhaust Check
NOTE:
The following procedure will require a known good vehicle of same make, model and year to be used for comparison.
- Check for exhaust restrictions. Use Pressure Gauge Tap J-35314) with a 0-15 psi (0-1.1 kg/cm2 ) range pressure gauge. Block drive wheels. Apply parking and service brakes.
- Place vehicle in Drive and load the engine at a steady 1600 RPM. If there is a 1.0 psi (0.1 kg/cm2 ) or greater backpressure difference between tested vehicle and a known good vehicle, exhaust system is restricted.
CAUTION:
Total time which engine is loaded against brake should not exceed 20 seconds.