That is very cool! Of course it doesn't work with the T4 kit I just put in!Ultra Series high performance high flow oval down pipe This 4in down pipe offers the highest flowing down pipe on the market for your 7.3l power stroke. The oval tubing offers a compact design that helps the tight clearances between the engine and firewall. The 4in tubing lowers exhaust back...ultradieselperformance.com
I’m prettty sure this was it.
Pretty pricey though.
I should add, no other codes, and anything over 3000rpms it sounds like its backfiring sort of. NO SMOKE whatsoever, not even in the race tune! And will even still build 32-35psi of boost.That is very cool! Of course it doesn't work with the T4 kit I just put in!
I just drove it 15 miles and it is not getting any better. I got home, did a buzz test, all passed. Then I did a CCT and it failed cyl 1. I checked fuel pressure and is rock solid at 56-57psi. No visible leaks. Pulling each of the 4 valve cover harnesses resulted in roughly the same results of rougher running. Unplugging the ICP sensor didn't change anything. When driving, HPO will peak 2800-3000psi and IPR % will follow like it should. But for some reason its showing my Inj Pulse Width is very sporadic, jumping from 1.8ms to 1000ms at idle? It does this while driving as well.
What would cause sporadic pulse width?
The engine was rebuilt, over 50,000 miles ago. When they did the rebuild, they machined too much off the head/block mating surfaces, so we were forced to go with .030" shorter pushrods, as they said that would prevent Piston-to-Valve contact. Maybe they did it wrong? But I put a camera in cylinder 7 a few months ago, and saw no apparent contact on the piston itself.Did you rebuild the engine? First thing that comes to mind from my personal experience is piston protrusion. Otherwise I have never dealt with that on the 7.3s myself.
Yeah the only aftermarket set I can really find is CSD, and they want $2500 for them! Ugh.Dan, I believe there have been a few issues with rocker arms on these engines that others have talked about. There isn't a whole lot that can be done. IIRC, there is an upgrade for stronger ones. Most will just do springs, pushrods and rockers all at the same time.