Thread: 2009 Colorado Engine Problem

They (common rail ) knock because they do small injection pulses before tdc
When injectors get worn these pulses are not controlled as they should be,
So more fuel before compression ignites and slaps the piston making a knock,
And yes all you Toyota lovers that rattling you hear on acceleration is rooted injectors

Most injectors are around 3-350 each, will need programming aswell

And an egr clean out, depending on kms could be a inlet manifold off job too

Gota love nice powerful common rail engines