for all those with surging idles...long

[avbcon12]

well, i just got to the root of my surging upon startups. i have been trying to tune everything possible in order to get rid of it. i knew my fuel pressure and timing were right on the mark...

so i then began to think that it had to be mechanical. i started to think about how i had my PCV system now then when my idle was smooth.

i had put a breather in place of the oil cap!

so then i was thinking that since i had the PCV still hooked up in the back of the intake there had to be a huge vacuum loss because i didnt have the tube that goes from the throttle body to the oil neck anymore. the PCV was just pulling air in through the breather i had put on. there was a HUGE vacuum loss!!

what i did was instead of putting the tube back on that goes to the throttle body. i just put a airflow control valve inline of the PCV. so i could keep the vacuum down so it wouldnt be such a huge loss, yet keep enough to evacuate the crankcase gasses.

that little valve solved ALL of my idle problems.
i just wanted to let you guys know because i know there are a lot of people out there that have idle problems...

hope it helps,
adam