Medium and Heavy Trucks
Have Truck Repair Questions? Ask an Expert
hi im alex, could i get your engine SN please
ok thank you, ***** ***** are you getting?
have you checked the fuel pressure?
so the boost is dropping off? or it just thinks it is?
ok so it is actually dropping, have you pressure tested the CAC?
yes charge air cooler
ok does it smoke when it starts acting up?
have you tried with a trailer?
ok perfect sounds to me like you have a fuel restriction under heavy load i would get a fuel pressure gauge on and drive it
ecm cooling plates like to plug on these
i only have what you tell my to go off of please remember that, if it starts missing under load and you take it out of gear and has no load and then clears up sounds like a fuel issue to me, i would get a gauge on it to be sure, low boost wont make it miss it would just have low power, but if you have low fuel pressure you wont make boost
have you checked intake and exhaust restriction?
this all started right after the inframe
well with no codes it will be hard to tell other than swapping it with another ecm
yeah i would really get a fuel pressure gauge could be a damaged fuel injector o ring just to be sure you are not chasing your tail rule all the easy stuff out sounds like you have checked it over pretty good
no could be just under heavy load when engine is pulling fuel hard
i have never heard of that or done that, i always just use insite, i still feel you should get a fuel pressure gauge on it just to be sure, here is the low boost troubleshooting go down that and see what you have or havent done