Patriot Motor Sports USA
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- Messages
- 86
- Reaction score
- 102
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- 18
After my three attempts to get dealerships to replace my in-tank lift pump due to fuel contamination causing repeated issues with the ECU putting the truck into "limp mode"... I decided to replace it myself. I also decided that since FCA is failing to keep up, there is no need for me to believe my warranty will offset any future problems. I have installed the EZLynk tuner and run it for a week with all emissions in-tact, then deleted the DPF exhaust and made another 3000 miles roundtrip with even greater results in MPGs, power and driveability. I have the SOTF option and saw a slight MPG gain running the 150hp setting with my truck unloaded, cruising at 70mph to be a negligible 16-17 MPG with full intact or running without the DPF. Where I saw the biggest gain is driveability around town, where my MPGs are typically 12-14, probably due to all the shifting the Aisin does between 1-4th gear, I now see a 17-mpg average. Hauling a 13,000# boat, I switched between 50-150hp while watching EGTs and more... ultimately just leaving it on the 150hp setting, netted me 11.5 MPG where earlier in the week, hauling a similar boat on the same trailer was getting 8.7 MPG, cruising at the same 65mph.
I think the tuning for the HO is in dire need of updating compared to that of the SO engine. I have been searching all the parts individually between the two and reached out to several aftermarket engine parts suppliers to realize the Camshaft is the same for both engines as are the pushrods and rockers. The new 2019+ configuration for the HO carries new part numbers for the Pistons and Rods as well as their crankshaft bearings. The fuel systems also require different part numbers for the #1 cylinder hard fuel line which is different. What is really nice is that the head bolts have been enlarged so the use of the ARP studs is not needed for power levels exceeding what the <2019 trucks needed to upgrade from 12mm to 14mm bolts or studs when running >50psi of boost. I have not seen many here deleting their HO trucks... so stay tuned, I am having great results with mine so far!
Since having truly clean fuel is a key component of not having these issues in the future, I built a "Fuel Polishing System" like what we have in our dual 900hp Volvo diesel boat... but on a smaller scale.
Here's a quick YouTube Short of what I did and it works great! I have now run 15,000 miles trouble-free and zero complaints!
I think the tuning for the HO is in dire need of updating compared to that of the SO engine. I have been searching all the parts individually between the two and reached out to several aftermarket engine parts suppliers to realize the Camshaft is the same for both engines as are the pushrods and rockers. The new 2019+ configuration for the HO carries new part numbers for the Pistons and Rods as well as their crankshaft bearings. The fuel systems also require different part numbers for the #1 cylinder hard fuel line which is different. What is really nice is that the head bolts have been enlarged so the use of the ARP studs is not needed for power levels exceeding what the <2019 trucks needed to upgrade from 12mm to 14mm bolts or studs when running >50psi of boost. I have not seen many here deleting their HO trucks... so stay tuned, I am having great results with mine so far!
Since having truly clean fuel is a key component of not having these issues in the future, I built a "Fuel Polishing System" like what we have in our dual 900hp Volvo diesel boat... but on a smaller scale.
Here's a quick YouTube Short of what I did and it works great! I have now run 15,000 miles trouble-free and zero complaints!