MPV 2WD V6-3.0L SOHC (1992)
1.
Install exhaust backpressure tester in place of Oxygen sensor (or CO test pipe).
.
With engine idling at operating temperature, gauge reading should not exceed 8.6 kPa (1.25 psi).
3.
Increase engine speed to 2000 rpm. Gauge reading should not exceed 20.7 kPa (3 psi).
4.
If backpressure at either speed exceeds specification, a restricted exhaust system is indicated.
5.
Inspect exhaust system for a collapsed pipe, heat distress or possible internal muffler failure.
6.
If no obvious reasons for excessive exhaust system backpressure are found, suspect a restricted catalytic converter.
7.
After completing test, coat threads of oxygen sensor (if removed) with anti-seize compound prior to reinstallation.
Drop Test
1.
Remove converter. Hold vertically and drop from about 20 cm (8 in) on to a block of wood.
2.
Turn converter over and drop it on its other flange from the same distance.
3.
If a slight knocking sound is heard from inside converter, or if ceramic grid moves inside the housing, converter is damaged and should be
replaced.
