Troubleshooting help - Printable Version +- Rawze.com: Rawze's ISX Technical Discussion and more (http://rawze.com/forums) +-- Forum: Big Truck Technical Discussion... (/forumdisplay.php?fid=1) +--- Forum: ISX Related Help (/forumdisplay.php?fid=68) +--- Thread: Troubleshooting help (/showthread.php?tid=4527) Pages: 1 2 |
Troubleshooting help - big_roy - 05-13-2019 I've got an 08 CM871 Serial#79252599 485/1650 W/@m*m^2 and it keeps throwing fault code: 0629 - Turbocharger 1 Compressor Intake Pressure - Data Valid But Below Normal Operating Range - Moderately Severe Level It comes and goes at random it seems like. Before this last round of tinkering there were 226 counts. I've also had 70 counts of 2288 Turbocharger 1 Speed - Data Valid But Above Normal Operating Range - Least Severe and 13 counts of 3348 Turbocharger 1 Compressor Intake Pressure - Data Valid but below normal operational range - Most Severe Level So far I've changed ALL the engine and turbo sensors, new air filter, and tried swapping with another known good ecm. Any help/ideas would be greatly appreciated. RE: Troubleshooting help - Moose - 05-13-2019 Has the CCV element been drilled out and both aftertreament can elements been "liberated"? Are you leaking oil profusely? RE: Troubleshooting help - Chamberpains - 05-13-2019 Is your air filter clean? RE: Troubleshooting help - big_roy - 05-13-2019 (05-13-2019 )Chamberpains Wrote: Is your air filter clean? Yes just put a brand new one in. RE: Troubleshooting help - big_roy - 05-13-2019 (05-13-2019 )Moose Wrote: Has the CCV element been drilled out and both aftertreament can elements been "liberated"? Yes yes and no oil leaks. RE: Troubleshooting help - Signature620 - 05-13-2019 Has it happened all of a sudden or ever since the ecm was reprogrammed? Sounds like the VG tables need adjusting. RE: Troubleshooting help - big_roy - 05-14-2019 (05-13-2019 )Signature620 Wrote: Has it happened all of a sudden or ever since the ecm was reprogrammed? Sounds like the VG tables need adjusting.It has be a growing problem, I want to say it started happening a couple weeks after it was reprogrammed, but honestly, it sat for that long before it was driven on a regular basis. I guess I could try a stock program and just ignore the other faults... RE: Troubleshooting help - Rawze - 05-15-2019 how much boost is it making? the symptoms you describe sound like an intake or exhaust restriction. After-market CAC?, Does get better power and boost when you have the exhaust disconnected from behind the turbo? RE: Troubleshooting help - big_roy - 05-15-2019 (05-15-2019 )Rawze Wrote: how much boost is it making? It'll make about 36-38lbs boost on average. The cac appears to be genuine Navistar but I can't say with 100% certainty. And there doesn't seem to be any noticable difference with the exhaust disconnected. I will say whoever did the dpf filter made a complete mess of things and I had to clean that situation up/out. |