Truck sat for year no batteries I purchased replaced oil cooler did egr delete , STC Fitting, blue spring kit , back pressure sensor, cleaned up turbo , icp and ipr . Ipr Kosovo 14.83 cranking immediate 84.5% pulled new ipr screen caved cleaned ipr replaced screen flushed. Hpop till clean oil flowed. Reinstall ipr also while doing oil cooler flushed inside of motor and pan with diesel to clean out old debris, before refilling with fresh oil. Still getting 84.5% at cranking instant and only 15 to 20 psi at icp. Disconnected icp shows 1350 psi and 55% at ipr still no start. What should voltage be at ipr connection Koeo and cranking.