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.

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.

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.

Have you considered going to speed density and getting rid of the MAF? Just looking at your list of mods, I'm guessing that you are maxing out your MAF anyways.

spray on contact electrical cleaner will work perfect

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.

That makes perfect sense

I have considered it, but the truck is my daily driver. I'm still learning how to tune with a MAF and don't feel comfortable trying to tune SD. I need to read the forums more a bout it.

I have used a MAF cleaner from napa on it and it does do alot better. I've had to use it a couple times though. I have no real love for the noise the open element filter makes, but I don't know of any enclosed filter that will flow enough.



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.

It's easier than you think it will be. If I can do it, you can also. :D

My truck is also my daily driver......when it has a transmission in it......:turd:

just wondering did you ever go sd?

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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