First, I apologize if this isn't the right spot for this post but I need help.

I recently replaced my mass airflow sensor and it seemed to be an easy enough job but... it's worse now than it was before.

1. Does anyone know where I can find a step by step guide to doing this task so that I can be sure that I didn't miss anything?

2. Is it possible that I got a bad part?

Thanks

 

Following are detailed instructions for removal. I hope this helps.




Mass Air Flow (MAF) Sensor


Removal and Installation

1. CAUTION:
Do not tamper with the sensing elements located in the mass air flow (MAF) sensor. Tampering may result in unit failure.

Note:
The MAF sensor module and body are calibrated and serviced as a unit.

Open the air cleaner.

Disconnect the MAF sensor extension harness connector from the wiring harness.

Release the air cleaner clamp.

Separate the inlet side of the air cleaner from the outlet side of the air cleaner.

2. Cut the tape on the wire loom of the extension harness.

Peel back the wire loom from the extension harness near the grommet in the air cleaner.

3. Remove the grommet from the outlet side of the air cleaner and slide the grommet down the extension harness.

4. Remove the MAF sensor plate and the MAF sensor from the outlet side of the air cleaner.

5. Disconnect the MAF sensor electrical connector from the extension harness.

6. Separate the MAF sensor plate from the MAF sensor

Remove the nuts from the MAF sensor plate.

7. CAUTION:
The grommet used to seal the engine air cleaner housing at the extension harness must be fully seated. Failure to do so will result in unmetered air entering the engine.

Note:
Use the alignment notch to correctly align the inlet side and the outlet side of the air cleaner.

To install, reverse the removal procedure.

 

Any difference in removal for a '04 F-150 5.4?

 

I actually just replaced teh MAFS on my 93 Splash. The truck ran horrible before it was replaced. Very easy installiation and the truck runs like new. Instant fix with excellent results. You perhaps recieved a bad replacement sensor. Also try reinstalling it. If this dosn't work, get the truck scanned.... that is if you havent already. Hopefully this helps somewhat.

Pete

 

I'm not sure about the F150 but I can give a BIG heads up to Nav owners. It ended up not being my MAS. I replaced it with two seperate sensors and I still had poor engine response along with what I heard all along... a hissing noise. Come to find out after consulting a friend of a friend in TN (I'm in MN) he told me to stick my finger under the cover on the top of the manifold. I did... I had an air leak in my tubing. He told me that this is VERY common in the Nav's and everyone always thinks it's a MAS. It cost me $3.50 to fix!!!

 

Another thing to add to the procedure would be to disconnect the battery, wait 10 minutes and then reconnect. Sometimes you need to force the computer to relearn the sensors after changing.