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1999 Mercury Grand Marquis GS 4.6L MIL Lamp on
Customer had no complaints other than CEL on. Ran codes and got the common 171-174 lean both banks. Did the MAF clean, check vacuum leaks, replace PCV,oem part. Checked for vacuum at crankcase with PCV plugged and no negative pressure. Cleared codes, test drov...
FIX posted 3/8/2010
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Message Closed
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34 Replies Received
34 Replies Received
Related Documents & Media | VIN | 2MEFM74W5X |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Intermittently |
Trouble Codes
| P0171 | Fuel System Too Lean (Bank 1) |
| P0174 | Fuel System Too Lean (Bank 2) |
| P0300 | Multiple Misfire Detected |
Message Closed
Vehicle Data
1999 Mercury Grand Marquis GS
| VIN | 2MEFM74W5X |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Intermittently |
Trouble Codes
| P0171 | Fuel System Too Lean (Bank 1) |
| P0174 | Fuel System Too Lean (Bank 2) |
| P0300 | Multiple Misfire Detected |
Video