Hi, got a CAT308E, runs fine for months, then randomly cuts back to idle...... nothing I can do to make it rev up, then randomly picks up and revs flat out. Was pressure-washing it few days ago, on tickover, then all of a sudden it kicks in and revs full bore with the throttle on idle. Anyone give me an idea what is causing this? would it be a sender unit? wiring fault?
Do you know how to get into the monitor panel and retrieve fault codes? Here is a video that shows how your monitor works. At the start it shows getting into the service menu but doesn't give you the code for it. It is either FFF2 or 9992. They don't show anything else for that but you can search around in there for event codes and fault codes. Post those up on here and maybe someone can tell you what is happening.
Sounds like it is doing a regen to clean the soot out of the exhaust filter. We have two 308E2 and they do it every couple of months. Does it run at high idle for about 20 minutes and then comes back down to low idle? Let it do it thing, we had an operator shutting it down every time it tried to regen and eventually plugged the exhaust filter, which put the machine in safe mode and had to replace the exhaust filter, luckily it was under warranty, because they are not cheap.
Depending how old your 308 is you may not be able to retrieve fault codes on your monitor and will require Cat to hook up a lab top.