Just bought a 2004 6.0 and already problems
I just got a 2004 6.0 with 97,000 miles on it for my wife and it's already giving me a headache.
It started when I was out of town, apparently it started running "bad" and the check engine light came on, she took it to the dealed and was told they could'nt look at it for a week so she had a local diesel shop pull the codes, she did'nt write down what they were but she told me that he said he thought it was the map sensor since it was throwing a variety of codes (Low boost, and some sensor codes). He took it for a test drive and of course it ran fine, so he cleared the codes and sent her on her way. When I got back home i drove it and it's been fine for a couple weeks now untill yesterday, we were pulling out of a parking lot and had verry little accel and I noticed I could'nt hear the turbo, so i put it to the floor to see if it would either kick down into a lower gear or start making some boost, but it acted like i had'nt done a thing, just slowly accelerated. once we got up to about 55 I again tried to get it to shift down or accel and nothing just slowly accelerated. No smoke and no check engine light, so I pulled off the highway and shut it down for a while. Started it back up and she ran like a champ. The only thing that is a constant that is kinda weird is that it don'nt seem to make boost untill it shifts into second gear, like if will pull and then shift and then bam you have a ton of boost. So any sugestions from the stroke experts on here would be greatly appriciated.