I have four trucks same model that I'm guessing I'm having a pre ignition problem on all of them. The air filter housing lid is being blown off and braking the plastic tabs on the housing. there is non dts codes regarding this issue on this truck I'm trouble shooting but i need to check the other three. Is there any one else out there having this issue or anybody else that could lead me in the right direction with this issue. its a kuboto propane engine