Has anyone experienced this? I searched and it looked as though this happened on a few GM cars but no work on it taking place with a Chrysler product.
A customer came in with a truck that previously had been tuned for a cam and heads setup. He bought the truck with a blown engine and went back to a stock setup. I pulled a stock truck file from the tuning repository and went to work. Once I had his tune finished, I flashed the truck's PCM and cycled the key a few times as instructed. Then when I went to crank, nothing. No starter turning over, no clicking or anything. I flashed the truck once more and had the same result.
As soon as I put in the original tune, it turned over and fired right up.
As far as the modifications I made to the tune, I left the other tuners shift points but increased the rev limiter a few hundred RPM. Then I made the necessary fuel/air/spark adjustments to put the engine parameters closer to stock. I also elected to disable SKIM and turn off some DTC errors because of long tubes etc.
Did I simply not wait long enough before trying to crank the truck? I see some people have to wait 15-20 seconds or disconnect the battery to get the tune to finalize on some Camaros. Is that the case here?