dinkstreet 300 i abs 1 Manuale-dofficina : Pagina 143

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          13. FUEL INJECTION SYSTEM                                            Downtown 300i ABS



 TROUBLESHOOTING
 Engine fail to start                           Backfiring or misfiring during acceleration
 · Intake manifold air leak                     · Ignition system malfunction
 · Fuel contaminated/deteriorated
 · Pinched or clogged fuel hose
 · Faulty fuel pump
 · Clogged fuel filter, throttle body
 · Sticking fuel injector needle
 · Faulty fuel pump operating system
 · Carbon deposit stayed on the fuel injector
 · Spark plug dirty
 · Fuel pressure incorrect



 Engine stall, hard to start, rough idling      Poor performance (drive ability) and poor
 · Intake air leak                              fuel economy
 · Fuel contaminated/deteriorated               · Pinched or clogged fuel hose
 · Pinched or clogged fuel hose                 · Faulty injector
 · Idle speed fail to adjust
 · Fail to perform PTS/ISC reset




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