NO CAT , gutted cat, and CAT's guts blow out the tail pipe end or lost inside some unknown muffler to the rear, mean.
Back pressures normal are gone and now indeterminate.
YES CAT the back-pressures are 100% known and the brain
inside the MOD valve, is modeled after this fact, 2PSI max we think, as measured at the O2 bung port.
We know this because 1: we do the pressure readings to find melted CAT and then see it 2 times, once bad, then good. 2psi WOT.
We know this because FSM says so and we find missing cat guts all the time and the EGR LIVE TEST FAILS and we can replace the MOD vaLVE 10 times an not cure the MOD valves wrong outputs, doing the tests the correct way. we learn that.
see this EGR page out of 96fsm and then annotated for older. this answers all your questions as to when and how.
http://ge.tt/6gvplbp2/v/32
![[Image: p.jpeg?fv_content=true&size_mode=5]](https://previews.dropbox.com/p/thumb/AAng1uiR2-Etek6m0MZbP29OPXjSVZmno5380MEixEIb4ELZX6Sj_xOqg5u8BswnUqS5PLAVflPLE51z_ddf2yMMM8n4pG_pAZrofsCyLlLH0mVdOhPH22xR8oA_aecYymqk-sqBN34QXe2UXfGUYp2hNk7jbJVBtK3snr121vwaHRGYlc5ZBb_jYSPGV47ketaQmFo7NI1pU4P61Nle-HT_-v7BJw_2hU1k-4yzgVkFG3EooxLLkYXxgGXNdxoyUNAAnTS1mm4bracIPYPJDnUcgQA3TdEc0a39AWBPL7NTl3Q941hlrlAWgEYsN6P_d9o8zkfMp-oULGaLZjoPzo6i/p.jpeg?fv_content=true&size_mode=5)
Back pressures normal are gone and now indeterminate.
YES CAT the back-pressures are 100% known and the brain
inside the MOD valve, is modeled after this fact, 2PSI max we think, as measured at the O2 bung port.We know this because 1: we do the pressure readings to find melted CAT and then see it 2 times, once bad, then good. 2psi WOT.
We know this because FSM says so and we find missing cat guts all the time and the EGR LIVE TEST FAILS and we can replace the MOD vaLVE 10 times an not cure the MOD valves wrong outputs, doing the tests the correct way. we learn that.
see this EGR page out of 96fsm and then annotated for older. this answers all your questions as to when and how.
http://ge.tt/6gvplbp2/v/32
http://www.fixkick.com