View Full Version : Turned truck on and no power/bad idle

July 9th, 2014, 10:18 PM
I'm not really sure how to diagnose this, I don't have a check engine light, or any other indicators. I turned truck on, drove to Auto Zone. Left, went to Advance across the street. Came out after a couple minutes, and when I started the truck, it acted like it was misfiring, just running VERY rough. After about 10 seconds or so, it would idle okay, but still rough. I drove home, which is about a quarter mile. No power. It sounds like the turbo is spooling, but probably not building much boost, if any. Definitely feels like a gas engine if it were missing. What's the first step in the diagnosis for this since there's no light? Thanks in advance!

July 10th, 2014, 12:18 PM
I pulled the codes, p0475 and p0603. Deleted codes, went back to stock tune and started truck. Still acts like it's missing horribly, and has no power. Throws P0475 with no light.

July 10th, 2014, 06:30 PM