Just had the same issue as the OP. Been on e85r. 50 miles to E. Swapped to FF. Car would start and sputter out. After about 8 starts I reloaded E85r tune and started right up.
Tune vs no tune cai. What most people think it means: No tune = no more fuel needed due to lack of additional air flow vs tune meaning additional fuel needed due to so much air flow increase. If you have a carburetor then this is the case but when you have a MAF sensor using a formula to...
Yes it can. May I ask why??? But you can tie up your exhaust valve actuators and leave them plugged in so you dont get any faults if you do replace with a non active
Your 305/35 or 30s have a larger contact patch than 275/40s. It may not be quite as long but the width is more mm. than you lose length wise. *&This is true at correct air pressures.