C15 Acert Help (w/ cat et results)

is this engine under warranty? if so make them do it. if they changed out the vva housings and it is still doing it. with everything else you have done. then yes it is the harnesses. they will not throw codes like they claim unless it is a dead break in a wire or complete failure of part. there has been many, many issues with the harnesses on the a-certs. the harnesses under the covers are a good weekend afternoon job. you may have to loosen the fuel and water lines that run up over the front cover to remove the riser plate. you don't have to remove the vva housings. there are two harnesses inside a front and back harness. does the plugs on the side of riser plate have oil in them? that is a dead give away that the harnesses are breaking down.

 

the gasket for the riser is rubber one pc. if it is a nxs it will be a one pc like a huge o-ring with a rib in it. the mxs has a roll of square strip that you will have to cut to length. and when you place the ends together put a dab of silicone adhesive on the ends to help seal. other than that nothing else I can think of you will need. unless your valve cover rubbers are leaking then replace them also.

 

i'm on the road and don't have my book with me. someone else can chime in on specs. if the o-ring is still flexible and not brittle and wasn't leaking before yes you can reuse it. be very careful tightening the nuts down on the injector solenoid's. you can snap them off and then you are replacing injectors.

 

I never have. just be careful when you bend the wire looms and don't cut into the new harness. also make sure the don't touch anything when you install the riser.