1989-Mitsu-Factory Manual · fuel system · страница 6 из 53 · Открыть оригинал PDF ↗
I. .
FBC SYSTEM - Troubleshooting
| Symptom | 1 Probable cause | Remedy |
|---|---|---|
| Rough idle or engine stalls | Engine coolant temperature sensor -~ malfunction | Check by using checker (MD998406) (Check component and replace if faulty) |
| Vacuum hose disconnected or damaged. | Repair or replace | |
| Throttle position sensor malfunction -- | Check component and adjust | |
| Engine speed sensor malfunction | Check by using checker (MD998406) Check harnesses for continuity | |
| Throttle opener control system malfunction | Check system. If faulty, check components | |
| Harness broken/short-circuited or connector not connected securely -~ | Repair or replace | |
| tngine hesitates or 3001 acceleration | Carburetor Acceleration pump malfunction _ | Check pump discharge rate |
| Choke valve remains open-cold engine 1~ Choke valve remains closed-hot engine | Clean choke bore and link- Check chgke valve operation - | |
| Enrichment valve faulty | Repair or replace | |
| Main jet clogged | Clean up | |
| Enrichment jet clogged | Clean up | |
| Secondary valve operation abnormal | Check valve operation | |
| Auxiliary acceleration pump malfunction -cold engine | Check pump discharge rate | |
| FBC system Feedback solenoid valve malfunction | Check drive signal by using checker (MD998406) Check component | |
| Vacuum switch malfunction | Check by using checker (MD998406) (Check component and replace if faulty) | |
| Engine coolant temperature sensor malfunction | Check by using checker (MD998406) (Check component and replace if faulty) | |
| - Throttle position sensor malfunction | Check component and adjust | |
| Engine speed sensor malfunction | Check by using checker (MD9984061 Check harnesses for continuity | |
| Harness broken/short-circuited or connector not connected properly | Repair or replace .~ ~~~ | |
| ingine dieseIrng (runs ifter ignition switch is urned off) | Carburetor Engine idle speed too high _ | Adjust idle speed |
| FBC system Slow cut solenoid valve malfunction | Check component | |
| ‘oar fuel mileage | Carburetor Choke valve operation abnormal | Check valve operation |
| Engine idle speed too high . | Adjust idle speed | |
| Electric choke malfunction | Check choke body and valve operation |
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