I have 93 Del sol Si. It's got the 1.6 Vtec motor. I'm having a hell of a time getting it to idle. I have no C.E. lights or anything. It starts and surges from 2k to 3k. then it settles down to about 2100 rpm till it works up and idles at 1500-1700. I have the idle screw all the way closed and I still can't get it to idle. I've adjusted throttle cable swapped out the IAC, brand new IAT. TPS works. Even swapped it for another one I have. Nothing seems to be making a difference. any suggestions????

 

Vaccum leak buddy..had the same problems with mine when I did my y8 intake manifold swap! Best of luck finding it!

 

i agree, I currently have the same problem from a vuccum leak

 

thanks for the heads up. I'll go through it with a fine tooth comb this weekend. I am greatful. both of you.