Cummins isx headache

[Edin]

Ok sorry for late respnding yes , it's happening above 15 rpm in upper gears I pulled yesterday out of Laredo,Tx like 43 k lbs all good to a speed of 67 68 mph , no problem climbig up small hills here in Missouri no problem start up hill with 64 on top Im at 60 61 mph . But as soon as I step on gas pedal gives me instantly stop eng light. Yes the shop I took it to they have in site cummins comp, NONE of the codes no Active Aand No innactive codes are stored . I Moderated it like 16 months ago and no problem untill now , Could it be bcz of fuell pressure , oil pressure I changed oil pressure sensor too it was faulty and changed it . Beggining to think what could give me that stop engine light but none is stored in Comp. Just wish to get down to Atlanta but afraid how Im going climb that Mount Eagle .