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1999 Subaru Forester S 2.5L Poor Idle Quality, Hesitation, MIL Lamp on, Spark knock
Customer complaint: MIL on, Hesitation, low/rough idle. Had code PO170 stored and sometimes returns after a few drives. I have verified the running issues and noticed severe spark knock on medium to heavy acceleration. MAF signal was a little low @ 2500RPM. Re...
FIX posted 8/31/2006
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Related Documents & Media | VIN | JF1SF6556X |
| Engine | 2.5 L / 4 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Hesitation, MIL Lamp on, Spark Knock |
| Occurs | Always, Hesitation Only When ECT Cold |
Trouble Codes
| P0170 | Fuel Trim Too Rich Or Too Lean |
Message Closed
Vehicle Data
1999 Subaru Forester S
| VIN | JF1SF6556X |
| Engine | 2.5 L / 4 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Hesitation, MIL Lamp on, Spark Knock |
| Occurs | Always, Hesitation Only When ECT Cold |
Trouble Codes
| P0170 | Fuel Trim Too Rich Or Too Lean |
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