Nice day so i took the buick into town for a beer (87 GN) . ran great !! On the way home started to run like crap!!! light throttle surge smokes black, etc scan master not throwing me any codes. stopped in a parking lot and looked for obvious vacuum leaks but noyhing found. i did unhook MAF and it ran a little better so i had it towed home thinking MAF is bad new one coming tommorow. Sound right???????