Question about 1996 Ford Escort 4 Door

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1996 ford escort, p0171 code and replaced all vacuum lines,. bad injector maybe? one ticks louder than the others. i cant find anything wrong

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Hello, Its possible the noisy injectory is a problem. The code p0171 is a lean code. This usually means there is a Vacuum leak allowing more air into the engine than fuel. You can take a spray bottle of water and mist the engine while it is running. When you come across the part that is allowing more air into the engine, there should be a RPM change. Fix the part you find.

Usually the p0171 Code is an average of all cylinders on 1 bank of the engine. You could easily have a clogged Injector making the fuel mix lean. There are some kits in which you attach a tank of cleaner to the fuelrail and run the engine on the cleaner until it stalls. You will need to ask an Autoparts store if the kit is available.

In any case, reset the trouble light after making a repair.

Posted on Mar 18, 2011


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My check engine light is on and I have an error code of p0171 please tell me what is this error code and the resolution I changed all 8 coils and spark plugs and several days later i received and error...

A code P0171 may mean that one or more of the following has happened:
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first thing i would do is test cylinder 5 fuel injector
to do this unplug cylinder 5 injector
then using a multimeter (if don't have one borrow one or buy a cheap one ) check the resistance of the injector should be around 12-15 ohms but very for different motors check one of the other injectors and if cylinder 5 reads close to other injectors it fine but if reads high or low replace it

second check for a vacuum leak
get some carburetor cleaner spray around intake gaskets vacuum lines etc. if idle changes u have vacuum leak there

thirdly clean the mass air flow sensor the make special spray for it which i highly recommend and should be under $5.00 the parts store u can use carburetor cleaner on it but not recommend because the carb cleaner can leave a residue on senor that will destroy it

if all above fails do a compression check on motor if cyl 5 reads lower than all others then there internal damage (bad rings, or burnt value )

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1996 ford escort

Check the injustion pump for volumn. It sounds like it is supplying to much fuel to the injectors.

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