the above mentioned car exhibits all these symptoms and more. Codes 171/174 indicate lean mix left bank or whatever. I'm tired hearing about that shit; it seems they're not very accurate. It said possible causes were MAF sensor, upstream O2 sensors, and/or EGR sensor. So I replaced/cleaned all of the above to no avail. Car still ran bad. Funny thing is I also have an '02 Ford windstar minivan that did exact same thing with the same codes. I took that one to the shop and they replaced the coil pack and now it idles and runs like a champ but it cost me over three hundred dollars. That was the conventional coil pack. My Sable has the Coil Over Plug Ignition system and I would like to know if anyone out there has any experience with diagnosing which individual coils, if any, are bad and how to replace them. The front ones are easily accessible but as is typical with the transverse engine, anything placed towards the rear of the engine is difficult to get to. Thanks!
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12-20-2008, 01:32 AM
