Low tone whistle 2000 150 4.2

I've sensed I'm down 10 or so HP since this started. Runs a bit rough at idle for the first 10 minutes after re-startup as well - the original start-up and idle are good. It hasn't done it for 2 days now however the last time I said that it came back the next time I drove it.. It's a weird sound and blowing across a beer bottle is a fairly close description. Was your sound constant or did it go away as the truck got to normal temperature? Does the MAF cause it to do it every time the truck is running or intermittently? Thanks for your input, I'll check the MAF when I get some time off next weekend if possible.

It only takes a few minutes if you have a "security torx" driver. You could grind a slot across the top of the screws with a dremel tho.

I took one apart and cleaned it with contact cleaner, my son had used up all my carb cleaner and didin't know it. :/ Anyway, I thought I had it clean but wanted a closer look for the fun of it. I use an eye-piece out of binoculars (fipped around and used backwards) for looking at stuff up close. That sucker was still dirty as anything, both "wires"!

Sure enough made my girl friend's car run better after cleaning. :) '96 T-Bird.

Alvin in AZ

I've got my dremmel ready to place a few slots in the security screws, the only thing is, my cheapy service manual for my truck points to the MAF on the 4.2 where it ISN"T . I know where it "has" to be so will go from there. Thanks for your input guys!