14 - Exhaust Restriction

14. Exhaust Restriction





Purpose:
To determine if the exhaust system is sufficiently restricted to cause a performance problem.

Recommend Procedure:
Use NGS Tester PID EBPA. An EBPA reading above 193 kPa (28 psi) indicates a restricted exhaust condition.









Alternate Procedure:
A thorough visual inspection will find the problem quickly in most instances. If an NGS Tester is not available and a measurement is necessary, measure voltage at Exhaust Back Pressure (EBP) sensor using a DVOM and ICP/EBP Adapter Cable D94T-50-A. Measure this pressure at wide open throttle, wheels blocked, and brake engaged.

Possible Causes:
- Collapsed tail pipe
- Clogged tail pipe
- Closed exhaust back pressure device
- Clogged catalytic converter
- Damaged muffler

Tools Required:
- ICP/EBP Adapter Cable D94T-50-A or equivalent
- New Generation Star Tester 007-00500 or equivalent
- 23 Multimeter 105-00050 or equivalent