emission trouble help me

swfk44 · 10-23-2009, 11:38 AM

hello newbie here.
needing some help here to pas emmissions by nov 2, i got 4 codes to deal with and your help is greatly appriciate.

p0113
p0171
p0174
p0306

i heard something about a rotten elbow causing vac leak, which would cause lean error and misfire cyclinder #6.

i need a little guidance finding this elbow before i take it to get fixed and find out it was a ten dollar problem and and pay someone 200 to fix it.

i was quoted one time to replace 2 -02 sensors 600.00

thanks randy

Cuda_Jim · 10-23-2009, 12:09 PM

Year, Make, Model, Engine size, mileage, any modifications?

p0113 Intake Air Temperature (IAT) too high
p0171 Lean Bank 1
p0174 Lean Bank 2
p0306 Misfire cylinder #6

theoldwizard · 10-23-2009, 01:13 PM

Whenever I see P0171 and P0174 together I think vacuum leak, not oxygen sensors. Vacuum leak could also cause your P0306.

When was the last time you did a full tune up ? Spark plugs, air filter, fuel filter, PCV valve, hose and grommet. Any dried or cracked hoses should be replaced.

swfk44 · 10-23-2009, 01:25 PM

1999 ford e-150
4.2 v6
178000 miles
no mods

new wires and plugs about 20000 back
bought a used mfa awhile back no different than the old one really
never done anything with the pcv valve or hoses to it

Cuda_Jim · 10-23-2009, 03:08 PM

You can find a vacuum leak with a spray can of brake cleaner or any thing that is flammable. Spray around the intake manifold/throttle body/air intake hoses ect with the engine running. The idle will change when you're near the leak.

The IAT sensor might need to be changed. Look at the connector/wiring for corrosion bent pins ect. It should be located in the bottom half of the air filter assembly. It's a 2 wire sensor....Unscrew it by hand 1/4 turn.