Shudder during Acceleration?

[ward105]

I have a '91 Mazda Navajo and have noticed a recent shudder while driving at normal speeds. Any ideas as to what would cause this?

 

[explorer pilot]

I have the same thing on a '94. I have changed spark plugs, wires, coil pack, MAF(although this had check engine light), TPS, three bottle of gas drier, two bottle of injector cleaner. Mine happened right after I changed my MAF and replaced the vacuum modulator on tanny. still researching PM if you find anything.

 

[Glen4X4]

I am not saying this will be a fix but after you had replaced the maf and all that did you reset the computer by unhooking the negative battery terminal for 10-15 minutes?