Just tested IAC, it's fine. Went and had codes scanned, here is what it showed:
DTC172 ( o2 sensor fault, lean)
DTC 213 (SPOUT circuit open)
DTC 332 Insufficient EGR flow (had hose off to test EGR vacuum)
DTC 538 Insufficient RPM change during KOER
DTC 632 Overdrive trans cancel switch
we pulled the short bar out of the SPOUT wire harness, checked timing. 10BTC. Put short bar back in & checked timing again, still 10BTC.
Seriously stumped as what to check next.
Sunday, January 15th, 2012 AT 9:04 PM