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If you like how she's running, no need to upgrade the HPOP - just run her. 320K on the original injectors? They are probably tired if so. I'm still running my 286K injectors, as they are doing pretty well, with just some cold start smoke. WOT ICP for me was 2200psi using a PHP 80HP DD tune, now 2500psi with the upgraded HPOP. I've since dialed back to a 65DD tune with even better ICP results.
If you intend to stay with split shot injectors, an HPOP upgrade not a bad idea, with small to moderate tunes (80HP or less). I did notice some mid-range RPM power increase with the Adrenaline HPOP. The T500, and CNC Fab stage 1 or 2 are good options too.
They're not the original injectors. I replaced them somewhere around 265k. So they're relatively "fresh".
I don't mind the way it runs at all. It's actually one of my best vehicles. But, I wouldn't mind making it even better. I'm progressing into a situation where I'll be towing 15-20k semi-regularly. A new truck simply isn't an option, and I believe the 7.3 is up to it, running as it is or better.
Check the IPR first, specifically the magnet on the IPR. Believe it or not, it's a wear item. I've had replace mine on two IPRs that were thought bad. As soon as I replaced them, the truck ran awesome again.
If after swapping the IPR for a new FORD or MOTORCRAFT part (please don't use aftermarket) and the issue persists, get yourself a Terminator T500 HPOP and keep on truckin'
Thanks John, i'll be taking a look at those when I get home this afternoon.
Something else crossed my mind though, is it possible for them to get stuck? When I got the truck 20 years ago it already had over 250,000 miles on it, and maintenance hadn't been kept up on very well. I had to fix and or rebuild a lot of things. I'm wondering if in those first 250k miles the IPR developed a wear pattern and is physically incapable of closing more than 65% or so? I'm not sure if that's possible but if it is it would make sense.
Thanks John, i'll be taking a look at those when I get home this afternoon.
Something else crossed my mind though, is it possible for them to get stuck? When I got the truck 20 years ago it already had over 250,000 miles on it, and maintenance hadn't been kept up on very well. I had to fix and or rebuild a lot of things. I'm wondering if in those first 250k miles the IPR developed a wear pattern and is physically incapable of closing more than 65% or so? I'm not sure if that's possible but if it is it would make sense.
I am new to the 7.3L,
but I collect documentation religiously, as you can see with the link.
Here's a couple videos showing how to disassemble and clean the IPR valve. Not a difficult job really. The hardest part is probably getting the damn thing off the HPOP in the first place. It's definitely worth a try, just a few months ago had a member gain 500psi of injection pressure just from cleaning his IPR.
Just so I can put some numbers into this thread. These were the readings during a WOT run from about 55 up to 90mph. The IPR topped out but injection pressure never really got any higher than 1600-1650.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
