Isx cm871 chirping at idle

[Rawze]

if it has been deleted.. then you also need to have the program reviewedto ensure it is not causing any harm.

copy the program out of the ecm and e-mail it tome for a review.


Could it be the fuel pump chirping?.

Maybe a worn out valve or injector?.

could be several things including a cam bearing slipping.

It can even be one of the injector lifter spacers wearing out and catching the arm ... although that is not common.

Maybe a valve seat or valve spring wearing out.

is the crank case filter a maintenance free one, or drilled out?. -- As any crank case fumes pressure buildup will starve the top end of oil.

Maybe a worn out valve or component in the IFSM?.

it can be a lot of things.

is it an OEM head?... or something else?.