Engine Performance problem
1995 Ford Taurus 6 cyl Front Wheel Drive 126000 miles
Car was running rough and cooling fan would not turn off when ignition was in the on or run position. Reviewed schematics and coolant temperature sensor was out of spec with respect to resistance test. Replaced sensor - didn't fix fan problem. Ran voltage tests at Control Relay Module and found EHC relay in closed position at all times. Replaced CRM and fan problem was solved. Checked EGR valve regulator solenoid and found it was bad - replaced it and engine now idles correctly and runs great but I still get a 558 code. Took the vehicle on a road test, accelerates smooth, lots of power, but at about 65MPH check engine light came on (it had not come on until the road test) andwhen I ran another OBD test I still get the 558 code but now a 332 Insufficient EGR flow detected code as well. EGR valve operates correctly under light vacum, verified intake port is clear, all vacum lines are intact. Any sugestions?
have the same problem?
Wednesday, October 1st, 2008 AT 11:24 PM