View Full Version : 2003 6.0L power lose?

2003 Superduty Bundy
April 10th, 2013, 01:22 PM
Over the last month or two during cold start up my truck doesn't have any throttle response until after it warms up and then the power just doesn't seem to be what it should. On hard acceleration it just lags and I get black smoke! once it warms up seems to get better but no balls if you know what I mean. I use a Superchips flash pack and recently got the following codes: (P0263), (P0603) & (P1000). Any insight would be appreciated!!

April 10th, 2013, 02:25 PM


P1000 simply means that not all required sensors have achieved readiness since the last memory clear.

You have injector issues. Not uncommon on a 6.uhoh. I'd recommend you detune it and put it back to stock for now, you may have a ECM issue.

April 29th, 2013, 06:25 PM
one of the worse things you can do to your injectors in your 6L is hop in and romp on it when its cold. i religiously let my truck warm up before i get in and drive it first thing in the morning. i let the EOT get to 100 degrees before i put it in drive(takes roughly 5 minutes). when i leave. what has your oil change schedule been? you should run 5w-40 full synthetic along with some rev-x

ive been filling my head with as much 6.0 info as i can ever since i started shopping for one...