Norcal wrench530
Active Member
Working on a 1993 Kenworth with a 3406C, having power loss issues intermittently, runs like a raped ape then feels like its got 50horses to quote the customer. Im not too familiar with this older system I did however find that Code 23 is related to the timing position sensor if what I found is correct?, now what i'm after is are there any ways to test this sensor and if necessary replace it? I did stumble upon that it looks like the old ECAP machine is required to calibrate sensor position. hoping you CAT guys out there might have a trick or two to throw my way. thanks!