Need Help Plz

[baro]

hello all im new this is my first post i just got a 93 lexus sc400 that needed a timing belt and a few other things . well i fixed the timming and every thing else it was running smooth but when i got on it it kinda jerked a few times . i looked on line and some ppl say its the maf so i cleand it and now it bogs when i give it gas but when i drive it it will bog a few times then takes off . after that it drives smooth and the cel comes off but when i stop the cel comes back on and it bogs . i rechecked the timing and everything is good im just lost and owner befor me said he got the maf changed at the dealership . any help would be great thanks .