kellyf Posted May 4, 2010 Share Posted May 4, 2010 Had an 05 excursion come in complaining of coolant loss.Also had a complaint of intermittent no start.Found egr cooler and oil cooler ok but head gaskets wiped.This thing has a banks controller,banks pipes,banks everything.Well I guess that means nothing to prior approval!After completeion of head gaskets,Had a no start one Time.Cut off key and then started right up.Gave back to customer.Drove 9 miles and quit.At first I had no codes,Monitered all pids.everything looks good.Take full sample.not sure if good,so I run hose off of pump right into known good fuel.no start.Damn!After a while of capturing samples on ids.ran eec test.Found a p0341.Now go to check for rust concerns,change cam sensor run pinpoint test.wiring checks out.says replace pcm.That did no good.Now when I moniter pids.my crank pid always good ficm sync on and off on and off.What the hell try ficm no change from that.Hotline tells me to do everthing I already have.What the hell! Quote Link to comment Share on other sites More sharing options...
GregH Posted May 4, 2010 Share Posted May 4, 2010 I'll bet you have a bad engine control harness.. Can you scope the crank and cam signals at the PCM? If you can't afford to replace the entire harness, I've gotten away with making a shielded harness to overlay the crank and cam wiring... Quote Link to comment Share on other sites More sharing options...
Aaron Posted May 4, 2010 Share Posted May 4, 2010 Man the F-harness is gettin' to be pretty cheap... the killer is the labor to put the damn thing on. Quote Link to comment Share on other sites More sharing options...
kellyf Posted May 4, 2010 Author Share Posted May 4, 2010 I,ve heard if you move the harness around it may start Quote Link to comment Share on other sites More sharing options...
hitechmech Posted May 4, 2010 Share Posted May 4, 2010 I've had a simliar concerns and found it in the harness by the fuel filter, egr valve area Quote Link to comment Share on other sites More sharing options...
Mike Jeanotte Posted May 5, 2010 Share Posted May 5, 2010 I had one with a surge and cam sensor codes with headgasekt failure and a chip. I suspected wire harness I removed chip from truck and it ran good I suspect the antifreeze got into the module causing problems. Quote Link to comment Share on other sites More sharing options...
Aaron Posted May 5, 2010 Share Posted May 5, 2010 Pulling on the harness can make it start from time to time, yeah. Start wiggling it near the fuel filter bowl. You may have to get aggressive with it. It may or may not start. Quote Link to comment Share on other sites More sharing options...
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