The car will start out stong until u let off the gas and and get back on it then a stong vibration and big loss of power until u stop for a min it will idle rough then click and it runs good to do all over again. i changed fuel filter and spark plugs the coils were replaced not long ago. Any Help??
P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)
P2106 Throttle Actuator Control System - Forced Limited Power
P0355 Ignition Coil "F" Primary/Secondary Circuit
May be your car run normally now, but you must check and repair the fault in advance.
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MaxiDiag Elite MD802
SOURCE: Check engine light comes on. p0171 and p0351 codes found
From Lusty Kid:
I know the economy is bad, but change all of the plugs. Check your PCV Valve hose, 150 rottens them out allowing air to be sucked in, thus all kinds of codes.
Depending on mileage. Dismount the EGR valve and clean passages. If you are really good dismount the throtle position sensor body and clean out passages with Choke Cleaner., dismount where the EGR valves connects to the engine, clean out passages. Also check the hose thats behind this mounting to ensure is not clogged. If clogged clean it out. If not replace it. Is about 1.5 ft. long, connects to the PCV Valve Hose.
When is the last time you change your harness. Can't remember??? Replace it. Good Luck
SOURCE: 2003 Ford Expd. running rough @ idle -
There could be many issues. These codes read your engine is running too lean. Check : all your vacuum hoses for leaks, PCV valve and hose, MAF sensor. This may require an experienced technician to figure this out. Hopefully I help'd!!
SOURCE: 2006 Ford Five Hundred -- Where's the fuel filter?
right rear just in front of wheel. push clips back and remove old filter. apply new filter insuring flow is correct direction by arrow on filter press the clips back in place and you are ready. check to see if it is leaking.
SOURCE: 2005 Ford Taurus SE 3.0L V6 OBD Codes P0171 and P0174
The P0420 code is a Catalytic converter efficiency code check the compression.Swap the #1 injector to a different location to see if the code follows.Test the coilpak. A cracked exhaust manifold is the most likely cause p0171 and 0174 Induction air leaks, vacuum or some kind fuel restriction, weak fuel pump, restricted fuel filter etc.You also could have an exhaust leak near the upstream o2 sensor. If youtake it in they will probably use smoke to find out where the leak is.
SOURCE: codes p2106
I think you'll find it's a problem with your throttle you might need to talk to you local ford dealer but don't get talked into getting bit's replaced! I've been tld that you can put a recommended cleaner into your fuel tank and this can sometimes cure the problem - worth a go................
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