Originally Posted by warewolff
The first link referenced an international specifically 97-03.
it was a little confusing to me as it said navistar but when you selected the 97-03 it said powerstroke 7.3.. cant hurt to call or email them though..
gb does bring up a good point and thats to make sure before considering power-adders that your engine is running to its potential stock first..
im not sure if I'd just shotgun all 8 injectors unless i had a compelling reason to do so.. though I dont doubt that in my case 140,000 miles of whatever crappy deisel fuels are out there have probably degraded the spray patterms of injectors..
my bus is a year 2000 my Engine is a year 99.. and there are a couple TSB's out on it that im applying..
one being that injector knock you get at low idle(if yours does it)... sounds like an intermittent rod knock but only does it at slow or just off slow idle..
there is a fuel pressure regulator upgrade that was never applied to my engine to take the low pressure rail from 47 to 72 PSI..
some of the ford guys did this and noted a light bit of increased performance esp right at take-off.. im doing it just because the knock annoys me.. (even though its deemed harmless)...
be sure your ICP asnd IPR are doing their job... if your ICP is beginning to fail but hasnt all the way it can result in low oil pressure at the rail which would end up in lower amounts of fuel per injection shot.
the ICP is the HPOP oil pressure sensor that the computer uses to determine whether to tell the IPR (HPOP pressure regulator) to up the pressure or not..
a lot of people just automatically replace the ICP when they buy a used 7.3, thats up to you..
if oyu connect the computer up and notice that your Commanded HPOP vs acrtual HPOP vary or the IPR duty cycle is all over the place to try and maintain then thats a good indicator either the ICP is flaky or the IPR is unable to respond to the computer;s requests... that directly affects performance..
GB: where di you buy your injectors from, and did you get a decent deal on them? if I do end up having to rteplace my #8 (per the TSB) for the idle knock then I might consider replacing them all just because id already be in the mode of tearing things apart..
there are also reports of the Lube oil pump becoming worn at 150k or so and ending up in lower than desirable oil pressure... some of the ford guys replaced theirs and went up 5-10 PSI in oil pressure on average... the Melling m208 is what they have been using... it is Stock Specs.. but in all the cases i read about online, their oil pumps showed wear when disassembled..
replacing the oil pump is a relatively easy procedure on these.. maintaining good lube oil flow will help with longevity.... the only time it would affect performance is if you ended up with an oil deficiency to your HPOP reservoire..
these engines in effect have some built in protection against running them out of oil... since no oil will also mean the fuel injectors fail to operate..