Racerguy,

In my 98 F-150 4.6L, do I have to remove the MAF before cleaning, or is it possible to just open the airbox, move the filter, and zap it in the tube? Will the cleaner evaporate, or will it hang around in the intake tube? I just put a K&N filter in and I was going to clean my MAF after a thousand miles or so to make sure that some oil didn't get on it. I beleive that since putting my K&N filter in (and making a poor man's CAI), and installing a Flowmaster 40 series muffler with a single 3" out, my gas mileage actually did go up, I am excited about that. But, I have heard of some folks losing some milage and performance after dropping in oiled-type air filters due to gumming of the MAF.

Thanks for your time.

mwkatm