2000 Mazda B4000 Q&A

2000 Mazda B4000 Question: I have a 2000 Mazda b4000 4x4. Lately it has been almost choking itself out.

If I try to go at a steady speed it will start choking. When it happens I pin the gas and it will stop till I try to get speed or go at a steady speed. I feel it on the gas. It doesn't do it all the time but is becoming more and more. I have cleaned my mass air flow sensor, changed my vacuum hose. Does this sound like a fuel/air problem or a possible throttle problem? The gear shifting(automatic)is a little rough lately too. -
Answer 1
have you repl fuel filter? if so do a fuel pressure test while driving under load to see if you are loosing fuel pressure -
Comment 1
Thank you. I will change fuel filter plus a pressure check. -
Answer 2
Check fuel pressure under load -
Comment 1
Thank you. Will do that. -