spn 157 fmi 18

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(01-18-2023 )tree98 Wrote:  If there's a bunch of air in the fuel system that could trigger a 559 code, although it should go inactive not long after startup if everything is working right. You need to run a leakdown test on it with insite. Personally I would take the head off the high pressure fuel pump and inspect for damage. That code means the fuel system is not making the level of pressure that the ECM is asking for.

Ok, so my question is could the injectors not being calibrated right cause the ecm to not see the requested pressure?

I’ll call and have him have the fuel pump pulled. I’m not in the area and I have no easy to to travel back 300 miles to do it myself. Anything else to look for or at?