Tuneless watches your Holley Sniper's sensors in real time, runs you through a guided road tune, and writes corrections back to the ECU with automatic rollback if anything goes sideways. Built for the engines big-cam owners actually have — not the textbook ones.
The base wizard got the engine running. It didn't get it running well. You don't want to pay $400/hour for dyno time. You don't want to spend weeks learning a 250-page manual. You want it to drive right.
30 minutes, a safe road. We walk you through idle, cruise, throttle, decel and cold-start with big-text driving prompts. No spreadsheet required.
Type "stalls when warm" or "bogs on throttle". Get the likely cause, the table that controls it, and a one-click AI fix.
The O2 sensor lies at low RPM with aggressive cams. We measure your specific threshold and refuse to learn below it. No false-lean death spirals.
Every AI write is a snapshot. If AFR diverges >2 from target within 60s, the change reverts automatically. You stay in control.
The question Holley software never answers: am I done? Tuneless gives you a single 0-100% number with a plain-English explanation.
DRIVE for novices, INSPECT for curious users, EXPERT for tuners. Same app, same data, three reading depths. Free tier gets DRIVE plus a read-only INSPECT — see what's wrong without the fixes.
Plug your USB-CAN adapter into your laptop. Open Tuneless in Chrome. Click connect. We talk to the ECU directly — no drivers.
Displacement, cylinders, cam profile (plain English: "stock", "lopey", "race"). Takes 60 seconds.
Idle. Cruise. Roll-on. Decel. Cold restart. We read every sensor at 10Hz. Big text tells you what to do next.
The AI proposes specific cell-level corrections with reasons. You check the ones you accept. We write them, watch for trouble, and roll back if needed.
Most people dial their build in once and they're done. So we sell tunes, not subscriptions.