Today cleaned out the entire intake, dissassembled, reassembled. Changed out all those little hoses with new ones from shosource. All fit great. Put new accel wireset on, the X2J computer from a 93 sho manual.
Started a little rough. Couldn't idle very well. Found out hard way can't use a different IAC. Cleaned old one from 90 and put in. Idle was still a little rough but smoothed out to perfect.
Drove it, what a difference!! Not so much in performance. Speedwise was abt the same. But smoothness a definite notice. I have digital dash and notice the gas milage at any point higher then with the 90 computer. I dont think cleaning out the manifold made that much a difference as what the ECU swap did. It controls the rpm much better, especially during shifts. Idles much better especially when slowing down, doesn't go up and down at all, stays smooth. Doesn't seem to stall as easily or drop rpm suddenly when accelerating normally. With 90 computer had to accel a little harsh to get it moving. Have a stage 1. When decelerating from say any speed all the way down to 35, instant mpg stays at 99mpg. Old 90 computer would give a number usually between 65mpg and 95 mpg. usually never at 99. Meaning its not putting fuel in the engine when your decelerating. Saves brakes and gas. An ecu swap to a X2J is definitely worth it in my opinion.
With all that positive comes the negative, my sho still does the same thing, cuts off every now and then. Mostly during heavy acceleration. Its so annoying!!
