My friend owns a 1992 Acura Vigor...it used to run perfect until recently. Occasionally, more often than not, when he pushes the accelerator from a dead stop, theres no response. It's like theres a lag, it takes a few seconds for the engine to come to life and rev up to get goin. Needless to say this is dangerous at stoplights and pisses people off behind him.. It's not the throttle body or cable, the TB does open up, we put the car up on a lift and checked, the damn thing was at WOT and no engine life. Just sits there at idle for a few seconds and then roars up. I'm thinkin its a feul problem. Not injectors, it doesnt make sense. Maybe the fuel pump or a clog in the tank/filter/lines? Although we changed the feul filter so its not that...Sometimes it works normal, most of the time it doesnt..i'd really appreciate some help so i can fix whatever the hell is wrong. Maybe some pointers on what to check out and what not. Thank ppls!

EDIT: We also changed out the TB/TPS thinking it was that, and no change. I think its something mechanical, he thinks its an electrical thing