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If Ford and Roush want to pay for new long blocks every 5000 miles because cant fix it or choose not too, that's fine by me. My plan is to remove the cats all together when the factory warranty is up or when I get tired of having it in the shop all of the time.

Check out this thread for more info on cat issues. I was getting the sulfur smell and muffled sound but also a P0300 and P0430 code under heavy acceleration. My 2023 RCSB with Roush supercharger is back at the dealership now and they are telling me I will need a new long block...

I'm just glad they were thorough enough to take a look inside for damage.

I am definitely going to make sure they contact Roush and ask about a new tune. I mentioned that to the service manager today. So far I feel like they are being fully transparent and listening to my thoughts about the issue as well. he said he had tried reaching out to Roush a few times today...

Apparently valve overlap. Kind of makes sense. if the exhaust valve is still open on the intake stroke it would suck air in from the exhaust and intake manifold.

I had the same thought as well. In order for something to make its way back into the engine the exhaust would have to have negative pressure right? I did find an article online that said along with back pressure, steps in the exhaust system also create negative pressure waves that travel back...

Yeah I have been chatting with David about it. I also sent the service manager a link to his post in case he wanted it for whatever reason. Maybe to use in building a case with Roush if they determine it was their tune that caused it. I imagine its the tune or just poor quality control on...

Dropped my truck off with dealership last Saturday. They called me today and provided a picture of the inside of the CAT. He said they scoped the cylinders and inside the engine to make sure none of the material made its way into the engine but he said it had. They saw scoring on the cylinder...

Good to know that cat replacement fixed the problem even though it may only be temporary. I am still waiting on my dealership to call me and let me know they have the cats in stock. I will let you know how my experience goes.

Roush recommends using a 6510 plug, one step cooler than stock.

Can you explain?>

Oh I could pull the plugs and check the gap. I could also install headers and aftermarket cats myself, but I have a 3/36 Ford warranty and a 3/36 Roush warranty that should take care of it. My biggest issue is that my local dealerships aren't willing to work on it. I am currently waiting on...

Its just a stock Roush tune that was provided to the dealership with the install, I doubt they did any kind of data logs. probably just loaded the tune and called it good.

Yeah i have a P3 V2 Gauge installed. They have pretty much said they aren't happy dealing with Roush for the warranty or they have had experiences in the past where they weren't able to resolve issues with P0300 and P0430 coides. One dealership said they had an issue with a mustang giving the...

I messaged Roush tonight explaining my situation and asked "what am I supposed to do?" It will be interesting to see what they say. I also thought about contacting Ford about it as well, but i am a little afraid of them forcing a dealership that doesn't want to work on it to fix it. The last...

I would like to think pretty average for a 40 yr old with a 700 HP truck. I'm not flooring it from red light to red light if that's what you mean. I'd say 90% of the time its normal driving that barely ever gets into the boost. But if a diesel truck or scat pack pulls up, I'm giving her the...

Im going through a CAT issue right now I think. 2023 F150 RCSB with the Roush 2650 S/C. I have 4400 miles on the truck. S/C was installed on the truck brand new. Started getting P0430 code a few days ago. Now I am getting P0300 and P0430. Took it to 2 daelerships they wont touch it...

Roush SCed trucks get no love. Everyone on the Whipple Train

Those are Ford Performance wheels. They call them the "Sinister Bronze" wheels. I think they are the same wheels that come on the Expedition Limited but bronze finish instead of black.

I need those seat skins in my truck