D01 Engine running irregularly (hesitant) (page 2 of 3)
- Make
- Fiat
- Model
- Seicento Factory Service Manual
- Year
- 1998–2010
- Section
- Engine
DiagnosisD01 Engine running irregularly (hesitant) · page 2 of 3
(Continued Engine running irregularly - hesitant)
| Step | Validity | Operation to be performed | Test results | ||
|---|---|---|---|---|---|
| OK | ⚠ | 🔧 | |||
| 3 | CHECK COILS | All OK | Problems found | Intervention | |
| With the diagnostic tool (Examiner or other tool) carry out active tests of the coils | Go to Step 4 | Ignition coil fault | Restore connection between coils and ECU, (Wiring diagram: E5030 "PETROL ENGINE ELECTRONIC MANAGEMENT") or replace ignition coils PROCEDURE OP. 5510C14 | ||
| 4 | CHECK LAMBDA SENSOR | All OK | Problems found | Intervention | |
| Check for correct operation of lambda sensor TEST 1080B test A | Go to Step 5 | Inefficient lambda sensor | Replace lambda sensor PROCEDURE OP. 1080B60 | ||
| 5 | CHECK ALTERNATOR | All OK | Problems found | Intervention | |
| Check for: correct operation of the alternator voltage regulator – connection between alternator and battery |
Go to Step 6 | Inefficient voltage regulator | Replace the voltage regulator PROCEDURE OP. 5530A22 | ||
| Incorrect connections | Restore the connections (Wiring diagram: E5010 "STARTING AND CHARGING") or replace damaged components PROCEDURE 5530B | ||||
(Cont..)
Parts & tools for this job For 1998 Fiat Seicento
- PARTEngine gasket setSearch: Fiat Seicento 1998 engine gasket set
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLFeeler gauge setSearch: feeler gauge set
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