wont run with maf plugged in, in need of help!!!
09-03-2013, 09:01 PM
#1
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wont run with maf plugged in, in need of help!!!
hey guys ive got a problem i cant figure out. I bought a used K&N air intake for my 2004 f150 5.4l. when my mass air flow sensor is plugged in the truck will start but idle rough until it dies. when i unplug the sensor it runs fine other than my cruise does not work. ive tried un hooking the negative terminal to reset the computer. idk whats going on i need help!!!
09-04-2013, 10:26 AM
#4
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Noooo...
Don't touch that sensor! Internally it should have two tiny and very fragile wires - get some "Mass Airflow Sensor" cleaner (CRC makes some - grey bottle I think), and just *spray* clean those things, hit it over and over inside that little hole and outside on the body - just don't spray the stuff into the electric clip. If you damage the wires, it can be an expensive part to replace (try $168 for mine - ouch).
It is like an alcohol based spray, so it drys very quickly but be (sure* that it is dry when you put it back in the air cleaner. You will likely need a T20 star wrench to unscrew the MAS (at least that is what I needed for my 2005 Lariat). Treat it like a fragile wafer of goodness, and you will be fine.
It is like an alcohol based spray, so it drys very quickly but be (sure* that it is dry when you put it back in the air cleaner. You will likely need a T20 star wrench to unscrew the MAS (at least that is what I needed for my 2005 Lariat). Treat it like a fragile wafer of goodness, and you will be fine.
09-04-2013, 03:08 PM
#7
You don't have to disconnect the battery just make sure the ignition key is in your pocket, that way you know the engine control system is off.
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09-07-2013, 12:02 PM
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Does the engine/maf run fine with a non K&N air filter?
I've been told that the oil based lubricant used with K&N filters can over time gum up the MAF sensor wires. Cleaning the MAF is a good idea, but I would recommend getting rid of the K&N all together. For the small HP it provides it is not worth it.
I've been told that the oil based lubricant used with K&N filters can over time gum up the MAF sensor wires. Cleaning the MAF is a good idea, but I would recommend getting rid of the K&N all together. For the small HP it provides it is not worth it.
09-07-2013, 12:14 PM
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Yes it did run before but i think when i switched intakes it broke but i Will try cleaning it. Is there any spray i can use other than maf cleaner? I.e. Electrical connection cleaner, brake cleaner?