Ok Im goin nuts... Ive got a 93 delsol SI with the d16z6 motor in it, I bought the car last october and it has sat in my garage getting modded wile im waiting for the snow to melt. I had not started the car in about a month and during that time i installed an obx throttle body spacer, dc header, hi flo cat, aem cold air intake and switched out the power steering for rack and pinion out of a dx coupe. When this problem happend the car will start and idle but at around 1500 to 2000rpm. After the car warms up then it will go between about 1250 and 1750rpm. I have checked all the vacume lines and run a vacume check, every line is at 22 psi vacume, i have run compression checks and come up with 170psi across the board with no fluctuation between four tests, (I like to be really thourough). I have even tried changing the IACV, map sensor, and even the TPS. I have gone as far as changing throttle bodys and no change has happend. If anybody could help me it would be greatly appriciated.