Engine Performance problem
2001 Ford Taurus 6 cyl Front Wheel Drive Automatic 156000 miles
My 2001 ford taurus sel (duratech engine, 24v, V6) has 156,000 kms on it. It has recently started to idle rough when at a stop. It takes about 4 or 5 seconds to finally drop to approx. 500 rpms at which point it starts to " chug". It sometimes will speed up to about 700 rpms. It only stalls when the A/C is running in the same conditions. I recently had the fuel filter changed. The trouble codes that appear are P0171 and P0174 which are bank 1 and bank 2 running lean. It does sound like there is a vacuum leak but I can not find it. All of the hoses appear to be in good condition. I have read so many different things in regards to what it could be but haven't tried many of them (fuel filter replacement is the only thing). There is a check engine light that comes on. Through my research, Ive found out that the light is an emissions trouble light meaning it can be various different components.
Any help you can give me would be fantastic.
Thursday, June 3rd, 2010 AT 3:39 PM