Hi All,
I installed a new 80mm throttle body + bored out LS6 intake manifold about a month ago, since then I am having problems with rolling idle..... If I sit at the lights after 5 seconds the idle drops to 1050rpm (desired = 800), but as soon as I start rolling the idle goes to 1800rpm.....
I know its not a vacuum leak as Ive tripple checked and it also is fine if I am stationary for long enough....
I am running COS3.... any ideas?
One thing I did notice is that the butterfly has a hole drilled out, but it looks like the drill bit did not make it all the way through (looks like a realy bad countersink).... Any thoughts?
I dont had a look at the throttle cracker/follower details in the idle section, but I dont really understand what it is they do exactly......