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+--- Thread: ISX400 Tune (/showthread.php?tid=5694)
Pages: 1 2
RE: ISX400 Tune - Rawze - 01-15-2020
A). turning the power up past 475hp, 1750 torque is absolutely counter-productinve for fuel economy.
B). if the truck can;t pull a hill worth a damn,.. blame your terrible spec'd rear ends. <- 2.xx is quite bad. As far as the "why", waterloo explained it fairly well. I also made some comments on this just recently on here. Here is that post: http://rawze.com/forums/showthread.php?tid=5681&pid=48907#pid48907
C). ABSOLUTELY YOU NEED TO REBUILD THAT FUEL PUMP, IF IT HAS 400K MILES OR MORE ON IT.... IT IS A TICKING TIME BOMD JUST WAITING TO TAKE OUT THE WHOLE ENGINE WITH ZERO WARNING!. I DON;T CARE WHAT YEAR IT WAS MADE! - THEY ALL FAIL!, EVEN THE NEWEST ONE'S.
D)> It would be rather dumb NOt to pull the engine cover off that thing and inspect the overhead cam... Adjust the valves while your at it. <- if you value your engine.
E). GO THROUGH THAT THING AND REPLACE ALL THE EGR AND EMISSIONS SYSTEM SENSORS, TOP TO BOTTOM BEFORE PUTTING IN ON THE ROADS...--- Give it an EGR tune-up,.. a thorough one, or SUFFER THOSE TOWING BILLS AND $25,000 DOLLAR REPAIRS IN THE MIDDLE OF NOWHERE AT THAT RIPP-YOU-OFF INCOMPETENT OEM CERTIFICATED (drain your wallet and do half-arsse repair) REPAIR SHOP!.
F). INSTALL A BOOST GAUGE INTO THE DASH AND LEARN TO DRIVE BY IT--- 20 PSI OR SO MAX BOOST + DRIVE IT 63 MPH OR LESS IF YOU VALUE YOUR LONG TERM BUSINESS PROFITABILITY!