Detroit DD15 chirping noise

[simon999]

There is coming chirping noise out of engine and when push accelerator that noise comes and truck cab/ engine shakes abit. Does not happening when idling only when pulling load. Ussually just before going uphill.
I thought it was bad fuel so changed fuel filter and didnt help.
The truck is factory emmission intact all stock cascadia with DD15 430,000miles. Any ideas where to start looking?

[RollinCoal]

Combustion seal on the bottom of 1 of the injectors,
Atleast it was on the last couple I heard a chirping in

[simon999]

(04-03-2022 )RollinCoal Wrote:  Combustion seal on the bottom of 1 of the injectors,
Atleast it was on the last couple I heard a chirping in

Thanks
Thats what I thought.. or cracked injector

[tsolson]

check your CAC boot clamps. I've had mine leak and chirp or squeal a bit when its under load.

[simon999]

Replaced injectors and problem is gone.

[RollinCoal]

Ouch... Glad it fixed it