When did you last clean the throttlebody and IAC system ??
Engines, Northstar, Cadillac Tech Tips or Google "cadillac forums northstar throttlebody cleaning".
The engine should cold start at 1200 for 20 or so seconds, then down to 900 for a while, then to 650 warm idle.
Engines, Northstar, Cadillac Tech Tips or Google "cadillac forums northstar throttlebody cleaning".
The engine should cold start at 1200 for 20 or so seconds, then down to 900 for a while, then to 650 warm idle.