LS/VTEC Help

[billyhoe]

hello all i have a 92 civic hatch with a lv/vtec. heres my problem, when i start the car it idles up to 3,500rpm then bacc down to 1,500rpm with the IAC unplugged it bounces between 1,300rpm and 1,400rpm. I tried 3 different IAC's so thats not the prob. COULD THE PROBLEM BE MY ODBI GSR UNDERDASH WIRING HARNESS MATED TO AN ODBII GSR WIRING HARNESS?

 

[92civicb18b1]

IMO you should have gone with OBD1, but since you used obd2 check the wiring to make sure it's right.

 

[1fast5gen]

what year is your motor? i have an obdI lsvtec in my 92 hatch with the gsr wiring harness and have no problems... let me know

 

[kaoskustoms]

make sure that your coolant is full if not fill it up and ry again if so let me know
kaoskustoms@yahoo.com

 

[lsvtec]

This has nothing to do with coolant level. Your wiring harness could be the problem you could also have a vaccuum leak.