F1 EXHAUST EMISSION CONTROL SYSTEMS The air distribution manifold should be installed Tachometer after the exhaust manifold assembly is torqued 2 Vacuum Gages to the cylinder head The recommended procedure for exhaust manifold assembly installation is as Pressure Gage 0 10 psi follows Clean the mating surface of both the Car 1 Angl I w l1 M t r manifold and cylinder head Install the exhaust Ignition Timing Light manifold to the cylinder head using a new gasket Engine Exhaust Combustion Analyzer Tighten the manifold to cylinder head attaching Compression Tester bolts down evenly Finish torque tightening to 29 to 35 ft lbs 3 4 a 4 8 kg m FI 24 REPLACEMENT PARTS FI 23 REQUIRED EQUIPMENT Parts necessary to repair and or maintain the Each Station licensed to perform repair and main Exhaust Emission Control System are available tenance on the Exhaust Ennssian Control System through eoy Jeep SALES CORPORATION were must be equipped with that equipment necessary house for major engine tune up analysis which shall in clude at least the following or equivalent FL25 WARRANTY Ignition Analyzer Oscilloscope All parts of the Exhaust Emission Control System Ammetef are covered by the Manufacturer s Warranty as Ohf m f 1 stated in the Warranty Service and eep Quality Voltmeter Maintenance Plan booklet F1 26 EXHHUST EMISSION CONTROL SYSTEM DIHGNOSIS GUIDE Pump Noisy Pump Inoperative Hoses Touching Other Parts of Eugiue or Body Loose Belt tighten belt do nut pty on housing Hood Filter Plugged replace Note The air pump is not completely noiseless Under normal c0nditi0 S Puml ROISO TISSS ih Pitch Exhaust Backfire as engine speed increases It 1S also desirable to allow for normal breakin wear cf the pump prior Check for vacuum leaks correct as necessary to replacement for excessive noise Check air filter for excessive restriction replace as necessary Pump Seized Check anti backfire valve replace as necessary Replace pump Leak In Hose Induction System Eackfire l I Check for leaks using soap and water tighten V fY engme timing eod drstuhufor dwell clamps or replace hoses Verify accelerator pump charge 146