03 6.0L start up idle speed / smoke / injectors.
When I cold (sitting overnight, air temp doesnt matter) start my engine the idle speed stays normal for a minute or so. Later it decides to bump itself up a couple notches. I assume to warm up the engine. Why, on a cold start, would it not be reverse with the high idle and then slow down when warm? It does slow down if I depress the brake or put it in gear. Is this behavior normal?
3 weeks ago I went in for service due to blue smoke and rough idle on cold (sitting overnight) starts. The dealer said they replaced my injectors. Is this related to above? I still get a puff of smoke every morning but the idle is never rough. Is this normal?
2003 F350 4x4 6.0L 48k miles