Check the fuel filter and that you're getting proper fuel pressure. Check the vacuum hoses for any leaks or breaks. You can clean that out with some brake cleaner just be sure the MAF is dry before you reinstall it. Oxygen sensors, EGR system, Mass Air Flow sensor, check for dirty or clogged air filter which can clog up the MAF. I had this one for a while on my 2000 Taurus and there's no real damage to the engine it just inhibits power and cuts down on mpg a bit if not taken care of because the engine will try to compensate for the lean codes. These parts can be had online for around 20 dollars This is a picture of the correct parts needed for the job. This will eliminate the codes and restore a smooth idle and better gas mileage. Get a pair of 90 degree needle nose pliers to be able go grab the PCV valve and turn it counter clockwise to get it to come out.Īttached the new hose assy and then put the upper intake on using new gaskets. Pull the wiring harness up and out of the way.
Take the upper intake manifold off and disconnect all hoses, electrical plugs and fittings off. Some people may be able to fix it differently than I did but the following procedure is they only way I could do it and I am a fairly Decent wrench. Many parts stores have this PCV valve listed wrong. You also need the PCV valve which is motorcraft part number EV-243 It is about 23 dollars at the dealer and 12 dollars at the online ford places. YF1Z-6A664-AB which is a rubber and steel hose assy available only from Ford. These are the parts needed to fix the car. This causes a vaccum leak which triggers the lean codes. The rubber tube that connects from the upper intake manifold and goes down into the PCV valve deteriorates ,gets a hole in it and collapes. On wednesday my car started running rough when I started it in the cool morning and has been doing it every morning sinceĪfte doing some research and then acquiring the parts to fix this It has pretty much been agreed to by other people that have had the same problem. This means that both banks are showing lean I cleared it and ran 5 or 600 miles and then threw P0171 and P0174.
Another Taurus forum I frequent has been having a lot of these codes lately on 2000 and newer modelsĪ couple of weeks ago I threw the P0171 lean code.
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