Took a while to get to Mexico but got a lot of different runs in. 1/4, 1/2, 3/4, and full throttle. Most of my P300s came from part throttle for some reason. I'm happy to report NO CEL. My builder and I are perplexed, but for now it seems to have worked. The car actually feels more responsive as...
My Installer said the same thing about the plugs buy we are going to try what Vortech wants and see if that works. I'm not pulling my hair out chasing ghost so if this doesn't work a new tuner it is.
Everything is gapped correctly. Just going to go back to standard range plugs and see if it clears up. Made my Installer scratch his head too. Matt has been working on mustangs since Fox bodies but he said he's seen stranger things.
Just got off the phone with my installer. He talked to Vortech and had a very interesting conversation. He has always used a 1 step colder plug with a forced induction install. The tuner at Vortech is telling him that he shouldn't have done that. We need to go back to the factory heat range and...
Keep me posted. I've also heard False knock is a PITA also. My builder said even NA 5.0s get false knock and throw P300s. He said it shouldn't be a worry until it throws a specific code I.E P301, 02, etc.
I'm curious as well. I have the same setup on my 2020 GT and get random misfires. P300 as well. Check engine light use to stay on now it flashes and goes off when it happens. It seems to do it at part throttle. I'm wondering if it actually likes full throttle. I tend to back out before full...