new old guy

checked out this sight for the first time,this morning,because of a new stumble upon acceleration issue. Found a lot of helpful posts to help me narrow down this problem.
Anyway, my name is Steve,have a 91 2600i,5sp,2wd,extra cab [not the proper Mazda option term,I'm sure]lol,with a smidge over 90k original miles on her. Been totally trouble free,great running up until a week ago.Thanks again for a few items to check before taking it to the "pro's" to dwindle my bank account down..

Hi Steve,

Welcome to the fold
Let us know what you try and how you get on.
Someone else may stumble upon this site with the same issue as you in the future
90k original miles...... sweeet.
And since it's a b2600 stumbling on acceleration


Courtesy of our dear Earl from:

Thanks Jenko. Yes,I saw Earl's pictures and that is where I started. I popped the cover and saw nothing but a nice clean board,just like the pic above.Could the corrosion,if any,be on the bottom side of the board? Being 57,my first thought was the fuel filter,since the truck runs like a top,with the stumbles coming and going at 2500rpm or less,usually.