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1992 Ford AEROSTAR 3.0L Poor Idle Quality, Hesitation, Surge, Stall
Customer replaced timing [...] Then vehicle runs rough and scan tool shows it is very lean exhaust.I replaced 02 sensor,checked all grounds and vacuum [...] induced will make it smooth out. MY question is if customer got valve timing off will it cause this...
FIX posted 3/22/2000
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Related Documents & Media 
| VIN | 1FMDA11U8N |
| Engine | 3.0 L / 6 cyl |
| Emissions | FED |
| Symptoms | Poor Idle Quality, Hesitation, Surge, Stall |
| Occurs | Always |
Trouble Codes
| 172 | no ego switch runs very lean |
Message Closed w/FIX
Vehicle Data
1992 Ford AEROSTAR
| VIN | 1FMDA11U8N |
| Engine | 3.0 L / 6 cyl |
| Emissions | FED |
| Symptoms | Poor Idle Quality, Hesitation, Surge, Stall |
| Occurs | Always |
Trouble Codes
| 172 | no ego switch runs very lean |
Video