1991-Montero-Service-Manual · trouble shooting · страница 16 из 63 · Открыть оригинал PDF ↗
| Incorrect ignition timing Leaking valves Worn fuel pump diaphragm or piston | Reset ignition timing, See TUNE-UP Replace valves, See ENGINES Replace diaphragm or piston | |
|---|---|---|
| Intake Backfire | Improper ignition timing Faulty accelerator pump discharge Improper choke operation Defective EGR valve Fuel mixture too lean Choke valve initial clearance too large | Reset ignition timing, See TUNE-UP Replace accelerator pump Check choke and adjust as required Replace EGR valve Reset air/fuel mixture, See TUNE-UP Reset choke valve initial clearance |
| Exhaust Backfire | Vacuum leak Faulty vacuum diverter valve Faulty choke operation Exhaust system leak | Inspect and repair vacuum system Replace vacuum diverter valve Check choke and adjust as required repair exhaust system leak |
| Engine Detonation | Ignition timing too far advanced Faulty ignition system Spark plugs loose or faulty Fuel delivery system clogged EGR valve inoperative PCV system inoperative Vacuum leaks | Reset ignition timing, See TUNE-UP Check ignition timing, See TUNE-UP Retighten or replace plugs Inspect lines, pump and filter for clog Replace EGR valve Inspect and/or replace hoses or valve Check vacuum system and repair leaks |
| Excessive combustion chamber deposits | Remove built-up deposits | |
| Leaking, sticking or broken valves | Inspect and/or replace valves | |
| External Oil Leakage | Fuel pump improperly seated or worn gasket | Remove pump, replace gasket and seat rrl |
| Oil pan gasket broken or pan bent Timing chain cover gasket broken Rear main oil seal worn | popey Straighten pan and replace gasket Replace timing chain cover gasket Replace rear main oil seal | |
| Oil pan drain plug not seated properly Camshaft bearing drain hole blocked | Remove and reinstall drain plug Remove restriction | |
| Oil pressure sending switch leaking | Remove and reinstall sending switch |
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