CM871 Timing Actuators

[Rawze]

Are you sure those components are being installed and properly torqued according to quickserv.com and not just slapped on there?.

- Is the correct amount of torque and engine positions used to set the injector rockers?. If someone is not setting them correctly, then it can cause a lot of issues including over-pressure of the IFSM passages due to back-feeding from combustion chamber(s).


Anyone bother to ensure the dampers (the diaphrams) on the back side of the IFSM were not worn out or packed with trash?.

Also, replacing the entire IFSM, and it still having the exact same issue = pointing towards the head itself, a slipped cam, or the injectors.

Could be a cracked head between the valve seats due to piss-poor delete programming causing damage too. More than 90%+ pf all de-mandate programming is absolutely harmful to these engines long term.

Check what I mentioned + Copy the program from the ecm and e-mail it to me for a proper review of what someone did in there. Does not matter how well you think they did. .. ensure it is not contributing towards engine/component failures.

also: What micron filter are you using for your fuel-water separator?. It should be 10 microns or less. It also should not be collecting any moisture in the bottom of it when the drain valve is opened and checked.