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Message: [QUOTE="Charles, post: 1314504, member: 103"] The first program I wrote I had never written a single program for an AEB PCM. I had to set all the scalers on all the maps and simply set the map values to points that made sense, sight unseen. The truck ran great. As it turns out, pw is pw and icp is icp. Only problem with that program was that I had way too much power for a stock trans and PMR, and I had left the icp a bit steep off idle and it would romp on a cold start for a minute when it was cold outside and the MFD got up onto the steep part of the map. Neither of which needed live tuning, both issues would have been the same on any other truck running that injector on a stock engine. On the flip side, the program I'm running now would run down the road clean and strong on any truck running a 200 nozzled hybrid on a stock engine. If there was something really weird with an oil system you might need to change something there, but.... in my experience.... NO. The same programs I ran on my red truck with 400/400's on a single stock 15 degree OBS pump run great with a BTS dual pump or a Gen 3. Drama queens would like you to think things are more complicated than they are. If your program's F'ed up, then yes. It will vary depending on the hardware you pair it with. If the program's calling for logical values and not depending on the hardware to max out to mask issues, then no, it will not struggle with hardware changes. If you set your indoor thermostat to 120 degrees with a 3 Ton unit in a large house you're probably not going to have any issues. Now if you install two 5 Ton units because you'd like it to be a bit warmer then yeah...... bingo..... you're gonna have a hard time. Instead of blaming the two nice HVAC units you just installed that are way more efficient than the pos 3 Ton trying to heat that whole house, why not just try setting the T-stat at 68??? If you call for dumb pulsewidth a 30% nozzle will mask that. And when you up the nozzle size to something that does what it's told like a 200, you'll be found out. Smoky pile of fail. Maybe just fix the file, and let the more efficient nozzle do its job. [/QUOTE]