r/ECU_Tuning

Just installed catless long tube headers on my 5th gen Camaro SS, added a wideband, and removed the rear O2 sensors. I’m trying to get rid of the CEL using an MPVI4 with the latest version of HP Tuners.

From what I’ve read, older HP Tuners versions supposedly allowed you to disable the rear O2 codes, so I tried going that route, but I ran into another issue the older versions of VCM Suite don’t seem to communicate with the MPVI4 interface.

Has anyone with an MPVI4 found a working solution or workaround for this? Trying to figure out the best way to handle the rear O2/heater circuit codes on the

I just got a lightweight flywheel installed and now I have false misfire codes coming on.

I have Ktuner, what should I do to fix the issue?

Totally new to this. I am okay with how to ECM works, it's functions, etc. but not the files, bin, strategies, etc. Not the tuning parts.

I am probably on a different task path than most of you so there isn't a lot of searchable data on what I am trying to do.

I have a 2003 Ford E350 van, 5.4, 4r100 auto trans. PCM is totally stock.

What I am going to try to do is swap the transmission to something more modern like and 8 speed 8hp70. The physical isn't an issue with adapters and I will run a Maxxecu standalone controller for the trans. My issue is making the Ford PCM NOT throw trouble codes/check engine light for the missing trans data it will expect to see. This is an automatic fail for state inspections.

I have bought the Moates Quarterhorse and Tunerpro RT. I also picked another PCM for my vehicle from a wrecking yard that had the same part number.

My plan is to pull the bin off the stock PCM using the Quarterhorse and Tunerpro RT through the USB and then flash that to the junkyard PCM, which will then be the PCM I put in the van. I will go through the various transmission relate functions and turn them off in Tunerpro. I will save the stock PCM in a safe place just in case for later if needed. It's pretty worthless anyway.

Anything I should anticipate? Flaws in my thinking? I'm an idiot because...............?

Any thoughts pro or con would be helpful. I don't have anyone to bounce ideas off outside of Claude or ChatGPT and can't always trust them.

NOT looking to "tune" anything by the way. Just stay stock

Thanks in advance for any help

So I've got a ford fiesta mk5 (or 4 facelift) zetec s, 1.6 has 100 hp, well, I was just thinking how tuneable are these ecu's I live in the UK so not really viable for me to import a j3 chip from Australia, but I was wondering if there's a way to read/write the ECU on the cheap, either over obd or j3.

Looking for a stock time for a 5.0 tune for a 2000 Explorer.

what are the best tuning programs (including software, diagnostics)

including similar applications such as vcds, autodata, davinci

Hey everyone! For the past 5 months, we've been building and refining a marketplace for ECU tuning. The concept is simple: Sellers apply to sell on our platform (easy application process), we check your credentials, reviews, and overall standing. If everything looks good, you are listed as a "verified tuner" on myECU and buyers can look up your tune or remote tuning services based on make/model/ECU type!

We take care of payment processing through stripe, and we act as a layer of protection between tuners and customers for chargebacks, faulty tunes, and user error.

For the entire month of may, we are not charging any commission on your sale, and we do NOT have an upfront listing fee. What you sell is what we base our commission on.

Apply for free at https://www.myecu.co/verify and join us on this ambitious journey to open up tuners to new markets around the world!

TLDR: ECU Tuning marketplace is live, use the link to apply as a seller, no fees for the month of May

I need help. I’m new to the world of ECU remapping and repair, and I’m starting from scratch. I want to avoid common mistakes and not waste time going down the wrong path.

If you could give me one key piece of advice based on your experience, what would it be to progress faster and make fewer errors?

Hi, I'm brand new to the speeduino and I'm looking to cut the ignition and injector signals simultaneously with a single button. I'm aware flat shift does something similar to this, but as far as I can tell it is only spark. Any help much appreciated!

This is for a Honda GX50H, my ECU is a Speeduino NO2C.

Preface, I do not regularly use AI nor am I an AI evangelist, but I am a VW/Audi nerd who loves engine swaps and found an interesting use case for AI.

2 years ago I built a TDI swapped B6 generation Audi A4 wagon (doner engine was a 2.0l BHW TDI out of a Passat). I worked with 2 different reputable TDI tuners to try and get the engine happy while also making sure the rest of the car was happy (cruise control, electric cooling fans, ABS...etc). In the end I was left with the following solutions/problems:

• Passat BHW tune which would not work with the Audi cruise control, ABS, or factory cooling fans
• BPW (Euro B7 A4 2.0l TDI) tune which could not talk with the B6 chassis.
• BKE (Euro B6 A4 1.9l TDI)/BHW hybrid tune which worked with the Audi chassis, ABS, fans...etc, but never made good power like the native BHW Passat tune made, resulting in an overall sluggish tune with mediocre fuel economy.

After essentially running into a brick wall with both tuners, I ended up just using the BKE/BHW hybrid tune which the car was happy with, but left a lot on the table when it came to power and fuel economy.

A few days ago I had a hairbrained idea to use Claude AI to analyze the Passat BHW tune and the BKE/BHW hybrid tune to identify all of the differences to try and finally get this thing running correctly. Short story long, it was able to identify all the differences and generate a new hybrid tune using all the BHW engine parameters while maintaining all the needed BKE parameters to retain cruise control, ABS, and the factory cooling fans from the Audi.

I uploaded both the native Passat BHW tune file and my new AI modified Audi BKE/BHW hybrid tune file to an online tool used to estimate HP/Torque values, and the charts were identical.

Power is way up, power band is much more usable, engine runs/idles smoother, and I gained 3-4mpg to boot.

I am not recommending anyone vibe-code a tune themselves, but in my case I was able to utilize AI to generate a new tune based on some already proven base maps and I am 110% happy with the results.

I have a 2001 bmw 325i with a ms43 ecu flashed to ms430069

I’m trying to use tuner pro to log data to get a baseline before I start tuning ignition timing and I cannot for the life of me get tuner pro rt to work.

I loaded the correct xdf, adx, configured the cable to the right COM port

When the cable is connected to the car it tests ok, when it’s disconnected it’s not detected???

When everything is connected and ready to go nothing happens. Car is running at idle, dashboard doesn’t move at all.

When I select “acquire data” DA changes from “Not Connected” to “Connecting” and doesn’t change for a very long time until it sometimes goes back to “Not connected”

I’ve spent hours on this I’m pulling my hair out

and people like him.

Community is about helping people out, I responded to his post asking how to get started, this is a really common question, asked multiple times a week. Now I know why ... because people like _brendov delete their post after they feel they got the information they wanted ... why ? wtf

My mechanic whom I see fairly often and have pretty long, in depth conversations with recently suggested I could work for him. He works in dyno, tuning, and makes most of his income analysing and dealing with DPF issues.

I was sharing with him my career stagnation and mentioned my experience and study, amalgamating roughly around engineering, sensors and computer-stuff (to save for detail) and he said he would love to have someone with my background on board who would be willing to learn WinOls and further into ecu mapping, etc.

Genuinely open and very curious as to what your comments might be on learning the ropes, the craft itself and so on.

Cheers everyone.