Ok I just fired the beast 5 min ago. It idles real rough and i know it's missing cause i don't have a timing light yet but i have to give it throttle to keep it runnin. Could 02 sensor and vaccuum lines be part of the problem? im still waitin on wire for my o2 sensor so i ran it without the o2 sensor. I tweaked the timing and it got better but not timed. could somebody tell me if an 02 sensor will affect how it runs, i know it will but not how much.. or if the o2 sensor has more affect on a high hp motor. It idles real rough and i know it's missing cause i don't have a timing light yet but i have to give it throttle to keep it runnin. Also i looked in the manual and couldn't find out wut other sensor is not hooked up. It sits on the back of the intake manifold and has a 2 prong plug. Manual says it is a coolant temp sensor but i got one in the front. Is there 2 coolant temp sensors on an 88 k5? I will have pics in couple weaks and maybe a soundbyte. Oh yeah y can't i post anywhere else besides garage? Says i need to have somebody activate account? How?