Looking for any suggestions or similar problems with this. I have a 04 ram Hemi QC with 18XXX miles. I recently put on 24" wheels and tires. I run 93 octane in it only, and tried octane boster. The first bottle worked fine. After i filled up with gas, and put the second bottle in, when i got home and came to a slow stop, the engine stalled, and cut off. Now, it seems that after I fill up with gas, and have the A/C on, it will stall, or idle rough, when a come to a slow stop. Also, ever since I've had my HEMI, the cruise control wont work right. Once I set the cruise, if I tap the decel. button, nothing happens. If I hold the decel. button for 2 or 3 seconds, the cruise will cut completely off. I've taken my truck to the dealership 4 times to fix these problems.
1st time- Flash the pcm
2nd Time- Flash the pcm
3rd time- dealer says 24" rims are throwing timing off in pcm and cruise control;pcm was programmed for 17" tires; put in program for 24" tires
4th time- "could not duplicate cutting off; informed customer not to overfill vehicle, can send gas into evap system and flood engine on hard stops. Cruise control-vehicle has oversized tries, found pinion factors different in pcm and cab modules. Programmed pinion factors into pcm and cab modules 634 revs/mile"
Will this fix the problem, or is it something else?

 

Well, you've defintely exceeded normal wheel size, but if I had to place a wager, I'd be looking at your choice of octane.

WAY HIGHER THAN WHAT YOU NEED.

My WAG is that the excessively high octane, COMBINED with you choice of oversize wheels, is the root cause.

If I was in your situation, I'd do the following.
Revert to stock. (which would also mean 89 octane and ZERO additives.)
Make 1 mod, and drive for 2 weeks.
Make another mod, drive for 2 weeks.
Etc.

This will allow you to find the root cause, and with input/help from the dealer, make things right.