Ive been having some idleing issues with my k2500 tbi350. It seems if i set the tbi up as per the intitial set up thread it wants idle around 1000rpm. the tps and iac are in the correct ranges at this point. id like it to be more around 650. it slams in gear when idling at 1000. i see in the bin the c/l idle settings are set to 650 already. ive checked for vacum leaks but found none. if i back out the throttle blade screw it will then idle down to 650. in fact when the iac is set closed for intitial setup adjustment the engine will idle all the way down to 350-400 and stay running. any suggestions?