How to Clean MAF in 97-03 F-150's
#18
#20
maf sensor
hi guys......i noticed you said that the truck has a rough idle . mine does the exact same thing , rough idle but not all the time .......and only when its cold .....i just bought this truck used ,but very clean , it has a 4.2, reg cab shortbox flareside.......btw it shows no codes........ im not really worried about it , but would like to know if u guys think it is the maf sensor ? thanks btw your pics on this were perfect .
#21
hi guys......i noticed you said that the truck has a rough idle . mine does the exact same thing , rough idle but not all the time .......and only when its cold .....i just bought this truck used ,but very clean , it has a 4.2, reg cab shortbox flareside.......btw it shows no codes........ im not really worried about it , but would like to know if u guys think it is the maf sensor ? thanks btw your pics on this were perfect .
#22
#24
#25
Excellent post, Chris91LX. I followed the procedure this morning on my V6 1999 F-150. All went well, truck runs good.
I would add, however, to the instruction:
"Gently pry the cover off the housing to access the back of the MAF sensor."
something like:
"The cover is held by four plastic (brittle) clips that snap into place when the cover is on. When removing you may need to use multiple screw drivers to release and hold open each clip in turn."
I used CRC 05110 -- Mass Air Flow Sensor Cleaner (spray can)
( http://www.crcindustries.com/auto/co....aspx?PN=05110 )
It worked fine, was very convenient, and cost about $8 with tax.
But after noodling around a bit I've read posts where people claim to have cleaned it with lacquer thinner (the CRC stuff above smells like LT to me), and even high concentration alcohol. But whatever solvent used it can't leave a residue, and you must avoid touching the wires.
I would add, however, to the instruction:
"Gently pry the cover off the housing to access the back of the MAF sensor."
something like:
"The cover is held by four plastic (brittle) clips that snap into place when the cover is on. When removing you may need to use multiple screw drivers to release and hold open each clip in turn."
I used CRC 05110 -- Mass Air Flow Sensor Cleaner (spray can)
( http://www.crcindustries.com/auto/co....aspx?PN=05110 )
It worked fine, was very convenient, and cost about $8 with tax.
But after noodling around a bit I've read posts where people claim to have cleaned it with lacquer thinner (the CRC stuff above smells like LT to me), and even high concentration alcohol. But whatever solvent used it can't leave a residue, and you must avoid touching the wires.
#26
Help!!
I've cleaned, cleaned Replaced MAF, ditched my K&N gone back to paper and after a few days again my "service engine soon" light is on. I'm headed to Autozone to have them read the code again ( they recommended a $100 MAF Refurb initially) to see if code is same or ???
I've noticed that the SES light comes on during the hot part of the day/noon hour after trk has bee driven 10 or so miles.
Just back from auto zone and a code of po171, oxygen sensor now...maybe...
I've cleaned, cleaned Replaced MAF, ditched my K&N gone back to paper and after a few days again my "service engine soon" light is on. I'm headed to Autozone to have them read the code again ( they recommended a $100 MAF Refurb initially) to see if code is same or ???
I've noticed that the SES light comes on during the hot part of the day/noon hour after trk has bee driven 10 or so miles.
Just back from auto zone and a code of po171, oxygen sensor now...maybe...
Last edited by SWITZERSLAND; 08-22-2011 at 01:56 PM.