TunersGuild

06/07/2026

Same broken sensor. Two different fault codes.

Plug a cheap OBD scanner into a Bosch EDC17 and it reads P2454. Take the same car to the dealer and the factory tool shows P148E — same wire, same fault, different number. It's not a tool glitch.

An EDC17 stores every fault as two codes, in two separate tables: DTCO (the generic OBD code any scanner reads) and DTCX (the manufacturer's own code the dealer tool reads). And the OBD table has gaps — a generic scanner can read clean while the car still has active faults living only in the factory layer.

I traced the whole thing on a real EDC17CP44 — the two memory tables, the internal checks behind the codes, and why clearing a code doesn't actually kill the fault:

👉 https://tunersguild.com/blog/edc17-dtc-table/?utm_source=facebook&utm_medium=social&utm_campaign=blog-edc17-dtc

05/06/2026

Find Any Value in ECU RAM 4 Methods No €10k Tools. Part 3

ECU chip tuning and calibration — explained by engineers who do it ...

03/06/2026

Reverse Engineering CAN From a Steering Button to Map Switching Part 2

ECU chip tuning and calibration — explained by engineers who do it ...

31/05/2026

CAN Bus Explained for Tuners: How Your ECU Really Talks. Part 1

ECU chip tuning and calibration — explained by engineers who do it daily.Diesel tuning, gasoline tuning, Ghidra reverse engineering, Winols tutorials, and EC...

21/05/2026

We just shipped Scrambler — and I've been waiting months to say this.

If you're a calibrator: you can now lock down your work 100% before shipping it to clients. The file still flashes and runs in the ECU like always — but nobody can open it in WinOLS afterwards and figure out what you actually did.

When you hand a calibration to a client, your know-how goes with it. Anyone with WinOLS can open that file later and walk through your maps — see what you changed, what your strategy was, how you tuned it. Three months of R&D, readable in fifteen minutes. Then a competitor's shop starts shipping a suspiciously similar tune.

How Scrambler works: drop the file in, get a scrambled version back. The file works in the ECU exactly as before — your client gets a clean, running tune, no compromise. But when someone tries to analyze it in WinOLS, they see noise: hundreds of nonsensical edits across the binary, no readable maps, no logic to follow. There's nothing useful to reverse-engineer.

One click. About thirty seconds.

Anchor price is €10 per protected file. First 5 are free — just an email, no card.

Try it, share it, tell me what's wrong with it — we're iterating fast.

Try it → https://tunersguild.com/tuning-tools/scrambler/?utm_source=facebook&utm_medium=social&utm_campaign=scrambler-launch&utm_content=ttt-fb-group

12/05/2026

Watch the vlog by Thomas

Can you really make money with chip tuning? Is it still a good business idea, or is the market already full of tuners?In this episode, I talk openly about wh...

11/05/2026

More power doesn’t automatically mean higher fuel consumption.
With proper calibration and optimized engine efficiency, a tuned engine can produce more torque and power while operating more effectively under load.

The real question is not just how much power, but how efficiently the engine produces it.

03/05/2026

26/04/2026

📚 Q&A Library — every Tuners Guild Q&A with Thomas, free inside your TTT account

How it works:

→ Past Q&A recordings — on demand. Q&A #1 (April 2026, 13 questions in 63 minutes covering Bosch EDC17, Delphi DCM, DENSO) is live. Each new session gets added after recording.

→ Future Q&A invites — Zoom link in your inbox 24h before each event. Sign up once, attend every future session.

→ Free TTT account, no purchase required.

Next live Q&A: May 19, 12:00 CEST. Open to everyone.

👉 https://academy.thomasteachestuning.com/course/open-qa-library?utm_source=facebook&utm_medium=social&utm_campaign=pinned-ttt&utm_content=qa-library-en

Got a question Thomas should answer live? Drop it in comments here or post in our Knowledge Base on community.tunersguild.com — that's how the Q&A backlog gets built.

26/04/2026

Tuners say 5-10% AirDesire for Stage 1. Thomas says 2-3% max — and here's why.

One of the questions from our first live Q&A in Tuners Guild — Marek asked about EDC17C74 AirDesire scaling for Stage 1. He'd seen "5-10%" in tuning communities and wanted to know where 3.5% fits.

The trap: that 5-10% range is a Euro 5 habit. Euro 6 changes the math. EDC17C74 already runs 19:1 AFR at critical load by emissions design. Even if you add 21% fuel, the mixture stays at 16.5:1 — comfortably lean. The air headroom you think you have isn't there.

Push AirDesire (DAMOS folder AirCtl_DesValCalc, base map AirCtl_mDesBas) past 2-3% and combustion efficiency starts dropping — you lose power, not gain it.

Full breakdown with the AFR math, the Euro 5 → Euro 6 baseline shift, and the symbolic-edit rule:

👉 https://community.tunersguild.com/t/how-much-should-i-adjust-airdesire-on-edc17c74-for-stage-1/95

Free to read. From Thomas's Q&A #1 in Tuners Guild.