Join Date: Apr 2008
Location: shreveport, la.
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Tunes trick the ECM into thinking icp is low, so yes that's most likely your sudden drop.
If it was a dying pump or leak (less likely on an 03), the icp would be real low and the ipr would be real high % trying to get more oil pressure.
03 cclb dually,6.0,arp studs,bpd oil cooler,bpd 6 phase ficm,bpd water pump,bpd all aluminum cac,all aluminum radiator,amsoil bypass oil filter,ipr high flow coolant filter,egr delete,livewire ts tuned by Vivian & tony,php ficm tuner,dc power 300-spx,Detroit trutrac,6" dual side pipes,07 front end,custom front bumper,shaved badges,led button roof lights,08+ mirrors,12 tailgate,13 rear bumper,13 tail lights,dropped I beams,custom rear 4 link w/bags,k5la train horn,24" alcoa's.
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