I have a 1994 4wd ext cab V6 3.0, I'm having stumbling and acceleration issues. It doesn't sound bad on the engine side when it's Idling but when I rev it, or accelerate it , it really stumbles. I just replaced the following hoping it would take care of the problem but it still has the same issues. Replaced the exhaust, catalytic coverter, oxygen sensor. I used an OEM direct replacement O2 sensor (denso). A direct fit Magnaflow Cat. I'm getting new plugs today to put in it after work but I'm hoping for some input before I'm forced to take it somewhere. Thank you in advance!