i just bought a 91 4dr ef and the guy says he builds tons of hondas but i dont no much about motors so i wanna make sure this is all legit...he put a d15 in it (not sure whats stock), put a d16 distributor on there, and he was getting ready to boost it so he put on b18 turbo injectors. (the car is NOT turbo) im sure everythings good, but i figure with the injectors the motor would be running rich...I wanna no if its okay with those injectors in there with it not being turboed? and after a few minutes the car will idle up and down and itll idle so low that it sounds like it gets close to stalling, but it doesnt. i just give it some more gas and it goes away. some help? is this fine? normal? should i get stock injectors? what could the idle problem be coming from? is that from the d16 distributor and the its timing? maybe something dirty like the IACV (idle air control valve)? Also have a clutch question if anyone knows old hondas...i heard somewhere about a hydro clutch??? what is that and hows it work(if thats forreal)? if you can put it into words that would be cool... Cause when i put my car in gear, the stick just floats back to the middle, but its still in gear. even when i put it in reverse...idk y it would do that, never had an older honda. so its like i have to remember what gear its in.....i really appreciate the help, and hope someone has a few answers for me to get me on the right track.