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1995 Mercury Grand Marquis LS 4.6L Poor Idle Quality
I have this Merc. that likes to surge the idle speed up and down about 100-150 RPM's at stop sign's [...] no difference if engine cold or [...] it will idle just [...] into throttle plate not much sludge buildup. I did replace IAC motor and no [...] if you tap...
FIX posted 12/10/2004
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Message Closed w/FIX
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17 Replies Received
17 Replies Received
Related Documents & Media | VIN | 2MELM75W8S |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality |
| Occurs | Idle |
Trouble Codes
| P0121 | Throttle Position Sensor Range/Performance |
| P0505 | Idle Speed Control System |
| P1124 | TP Sensor Signal Too High / Too Low During Self-Test |
Message Closed w/FIX
Vehicle Data
1995 Mercury Grand Marquis LS
| VIN | 2MELM75W8S |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality |
| Occurs | Idle |
Trouble Codes
| P0121 | Throttle Position Sensor Range/Performance |
| P0505 | Idle Speed Control System |
| P1124 | TP Sensor Signal Too High / Too Low During Self-Test |
Video