Fuel Delivery System Too Rich During Cranking (Subaru)
What does P1182 mean?
The P1182 code means the vehicle's onboard diagnostic system has detected: Fuel Delivery System Too Rich During Cranking (Subaru). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Engine flooding during cranking
- Strong fuel smell at startup
- Black smoke on startup
- Spark plugs fouling frequently
Probable Causes (Ranked by Likelihood)
- Leaking fuel injectors (dripping into cylinders) Very High
- Fuel pressure regulator stuck closed (high pressure) High
- Coolant temperature sensor reading incorrectly cold Moderate
- EVAP purge solenoid stuck open Moderate
- ECM fuel delivery calibration error Low
Step-by-Step Diagnostic Procedure
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Check fuel pressure -- should be within Subaru specifications
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Inspect spark plugs for heavy black carbon deposits (rich condition)
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Test fuel injectors for leaking by pressurizing the fuel rail with engine off
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Check coolant temperature sensor reading at cold start
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Test EVAP purge solenoid for proper operation
Frequently Asked Questions
What causes engine flooding during cranking?
Leaking fuel injectors allow fuel to drip into the cylinders while the engine is off. When you crank the engine, the excess fuel floods the cylinders, making it difficult to start. The engine may smell strongly of gasoline.
How do I unflood the engine?
Press the gas pedal fully to the floor while cranking. This signals the ECM to cut fuel injection and allow more air in. Some Subaru models have a clear flood mode that activates when the throttle is fully open during cranking.
Can fouled spark plugs cause P1182?
Fouled spark plugs are a symptom of the rich condition, not the cause. However, once plugs are fouled, they make the starting problem worse. Replace fouled plugs and then address the root cause of the rich condition.