I bought a 91' Suzuki Samurai JL a few years ago, manual 5 speed with a brand new clutch. a year ago it started acting up. it starts, and idols fine, but when I get going it loses power about half way through each gear. (loses power as in, sputters and falls on its face, does not die all together) I have checked distributor, coil, and even got a new computer, but the problems did not go away. so now recently I ran a fuel pressure test and it does not hold pressure drops immediately after I cycle key off. pointing me towards fuel system. I changed the fuel filter, and tested regulator which is fine. now I am replacing the fuel pump in thought that the check valve is shot in it. I have read that the timing could be off, if the new fuel pump doesn't fix ill take timing cover off. anyone have any input or direction they can point me in here? getting frustrated.