Dirty MAF causing truck to not run right?
#1
Dirty MAF causing truck to not run right?
What is a good way to clean the MAF sensor? I was going to use those foam tipped q-tip's instead of the cotton ones, but was unsure what cleaner to use. I am having trouble with the truck stumbling at idle and knocking bad at tip in. My AFR is all over the place. I swaped MAF's with a friends truck and the truck worked great, then after the first rain storm its back to crap again.
My thought was the rain is driving through the k&N since its right behind the headlight. I bought a prefilter and was going to clean the maf and try the prefilter.
Also when I get on it hard and it goes into PE I get up to 5 deg of knock. My timing is set at at 16 on all boost conditions. My thought was the dirty MAF wasn't detecting the air comming in quick enough so it delays PE and then it actually does knock.
My thought was the rain is driving through the k&N since its right behind the headlight. I bought a prefilter and was going to clean the maf and try the prefilter.
Also when I get on it hard and it goes into PE I get up to 5 deg of knock. My timing is set at at 16 on all boost conditions. My thought was the dirty MAF wasn't detecting the air comming in quick enough so it delays PE and then it actually does knock.
#2
13 Second Truck Club
iTrader: (10)
DO NOT touch the little wires in the MAF with anything. Ever.
Pick up some MAF sensor cleaner, any local auto-parts store should have it. I know CRC makes some that works well. Just spray the little wires with the cleaner, and let it sit as per the directions on the can. Again, DON'T touch the little wires.
Pick up some MAF sensor cleaner, any local auto-parts store should have it. I know CRC makes some that works well. Just spray the little wires with the cleaner, and let it sit as per the directions on the can. Again, DON'T touch the little wires.
#3
Staging Lane
Join Date: Jun 2007
Location: Fort Worth TX
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Also the oil on the K&N filter might be causing the problem it gets on the MAF sensor and then that gives very small particles(that would usually not stick in the MAF sensor) something to hold on to.
#6
On The Tree
Join Date: Jan 2009
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lose the open filter. keep a box on it. the MAF is really sensitive to water, It works by how much juice it needs to heat the wires and if the wires get wet they do not heat/cool properly and you get a wrong reading which will throw off everything. Do not touch the wires! if you have to clean it I would try spraying a electrical cleaner on it. If not then you might need to replace it.
#7
lose the open filter. keep a box on it. the MAF is really sensitive to water, It works by how much juice it needs to heat the wires and if the wires get wet they do not heat/cool properly and you get a wrong reading which will throw off everything. Do not touch the wires! if you have to clean it I would try spraying a electrical cleaner on it. If not then you might need to replace it.
Also while crusing on the highway yesterday I was just watch LTFT for B1 and B2. B1 was about -4 through -6. B2 was +6 to +9. Which side is bank 1 on these trucks? I'm wondering if my exhaust leaks are screwing it up.
Last edited by PSM; 06-19-2010 at 11:39 AM.
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#10
CRC MAF Sensor Cleaner... can be found at any auto place, like autozone, etc etc...
http://www.crcindustries.com/auto/co..._ss.aspx?ID=90
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http://www.crcindustries.com/auto/co..._ss.aspx?ID=90
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