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Why does nobody talk about how much weight a tuner adds to the ECU load on a 2015 5.0?
I was looking through my SCT logs last weekend and noticed the load values jumped by 15% after I flashed a 93 octane tune from a popular company. Checked the forums and found a thread where a Ford engineer broke down how these canned tunes push the PCM way past safe limits on stock fuel systems. Has anyone else seen these load spikes and just ignored them?
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shane65510d ago
Wait, 15% is actually normal? I thought mine was gonna blow up seeing that in the logs.
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annas8710d ago
That 15% jump is EXACTLY what I noticed on my own logs too. I read somewhere that a Ford calibration engineer straight up said those canned tunes push the PCM past safe limits on the stock fuel system, especially on a 2015 5.0. The load numbers are scary high once you start looking at them. A lot of people just flash the tune and drive, they never check the actual values the tune is demanding. The stock fuel system can only handle so much before you get into lean conditions or knock. People ignore it because they think "if it's from a big name it must be safe" but that's not how it works.
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alicecooper10d ago
I get what you're saying @annas87, but I think some of those "canned tunes" get a bad rap because people lump the cheap ones in with the quality stuff. I ran a Lund tune on my 2015 for over two years with zero issues, and my logs showed the load numbers were actually lower than the stock calibration in some spots. The real problem is when guys buy a generic tune off eBay that's made for a completely different setup and expect it to work. If you go with a tuner that actually does remote logging and adjusts the fuel trims for your specific car, the stock system holds up fine.
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