Smarty Probelm

I did read your thread before I posted this one but I am having a little different problem than your case. I'm taking it to a dealer Thursday to have the can bus checked out and go from there.
 
I just got back from the dealership. They hooked it up and the CAN bus checked out good. Then we did the reflash and that was good. Went to load the smarty and the same error happened. So the ecm and can bus must be fine then, right? So what else can I try? I'm going to try to plug all of the sensors back in I guess and see if that has anything to do with it.
 
I'm still having issues. Has anybody ever had a truck that didn't perform consistently? Sometime I'll start it and it will run just fine but other times the thing will run flat. It will act like it doesn't have 100hp under 2000 rpm. Above that it will run again but I have to manually shift it to keep the rpm's up and can't let it shift to overdrive because it won't pull itself in that gear. Does anybody have any thoughts to what is going wrong now?
 
Did the original error cause a problem with my ecm? Or is something else? The truck still does the same thing with a different programmer and when it is flashed back to stock.
 
Bump. Truck is still having issues and still hasn't thrown a code to hint at what's going wrong. Could it be something to do with reading the throttle position or something with rail pressure or any other ideas?
 
Well I shimmed the rail and put a new rail pressure sensor in just to see but they didn't make any difference. Do I just go ahead and replace the ECM?
 
Yep and I had it dealer reflashed 3 times now. I've returned it clear to stock and tried to delete it again with different programmers but none of it makes any difference to how the truck runs after the first smarty download messed up.
 
I had the exact same problem. But I never could get it to flash back to stock, so after the smarty ****ed up I had to buy a new ECM. runs fine now but the Smarty still wont program. It wont even VIN lock

Did you ever figure anything out?
 
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