For example- I had an 07 that had a miss fire. Customer didnt state when. No miss on start up, no miss going up hill under load, wide open, or slight throttle, when i pulled the CMDTCs out of it, the miss occured at 92 miles per hour on cyls 7 3 and 2 engine load of 40% eot was 223* ect was 221* and had 3 warm ups since the failure meaning it was driven to operating temp then shut down for a cold soak (possibly shut off when they got to work then started at 5 then shut down when home then started and went to work). also happened in 5th gear APP (throttle pedal) was indicating held to the floor (possibly in an attempt to get to work fast or blow it up)
Its hard these days to be a shady person and place blame on something or someone else when you are responsible for the truck. It would be like me if i had someones truck to do on the side, and i went and installed a EGR delete kit oil cooler and did a coolant flush and oil change and turbo cleaning, i take the truck down the road find a long steep hill and hold it wide open and once i crest the hill it loses power and starts to lightly smoke and a head gasket burst-that would be my responsibility. But if i did all that and it turned out a different result such as a failed injector-thats not my responsibility thats a totally different failure in no way related to the coolant component upgrade.