870 0482 code, low boost

[DCtruckin]

(01-10-2025 )Rawze Wrote:  If the vehicle is sluggish then it could be engine, but also it might be that you have too tall of rear ends in it for the application.

870's are a decent engine, and yes, they are naturally a bit slower on the up-take, especially at lower rpms, compared to anything more modern due to turbo lag, etc..

... Use the CT software to monitor the fuel control state to see if it is allowing full fueling at 100% loads. that and/or if you still don't think its making its advertised HP then have it dyno'ed/checked.
info: http://rawze.com/forums/showthread.php?t...3#pid58693

Also, at 475 HP, it should be cresting at about about 35-36~ish psi boost or so. It only takes 37 (38 max allowed) psi boost to make 600+ HP.

Many factors can make for lower (or incorrect) boost, including improper delete programming, clogged muffler, cac leaks, controller going bad, control arm hanging up, etc.etcv.etc.

If 'RR' did the programming, then that part should be ok.. as he knows the 870's very well... but if it is suspect, then monitoring fuel control state and other settings, as mentioned above, would reveal it.

This thread may also help...
http://rawze.com/forums/showthread.php?t...8#pid54418


and NO.. you should NOT be jumping CPL's and trying to use alternate programs in it.. that is a fast track to tearing something up. Have 'RR' simply change the power level .. Tier 2 CM870 will handle about 525HP, and about 1790 trq. .. maybe 1820 trq max. before those mid-tier injectors start getting hotter and wearing out sooner.

The motor is self is a Recon long block, about 125k miles on it is all. its got 3.90 rears which is perfect for the application.

Would I use the CT while driving the truck or idle?

The whole turbo system is newer(see post above)

By no means am I trying to jump CPL'S I was just curious since every other ISX model CPL is listed somewhere on the web with that info. What would you think the 8520 would be safe power level? Im seriously about to make the EGR work properly again and take it directly to Cummins. But ill try these things as mentioned first.