I got my ECU flashed by tuner months ago and everything was fine!

Then one day, I found something wrong with my car. Idle was rough and not good, sometimes it goes up to 1200rpm and back to 800. So I went back to tuner to get it fixed.

He tried to set the timing to be 14 at idle but when I logged the data I found that the timing is not 14, it goes up to 50 and down to -1.
He tried to fix it and sometimes it's fixed (timing goes around 12-17) but a few days later I got the same issues.

And at high RPM and High Boost (1.5bar WOT), car knocked many times (I heard the knocking sound)

So now, I'm ordering the cable to get it fixed by myself but I have no clues about this.

Could anyone help me what's wrong with my car.

Thanks!

 

Wow my timing is set to 7 at idle. So you are saying that your car is idling at 800 rpm with the timing set to 14? I would think that the idle would be much higher at that timing if no tps adjustments were made. What mods do u have right now?

 

There's a thread on here, search for it. It says "please post your fully tuned timing maps" and it has like a million different peoples maps and their mods and everything. That thread will give you a very good starting point on what to work with. Who tuned the car?? Just wondering.
Edit for tread url:
https://www.evolutionm.net/forums/showthread.php?p=11107941#post11107941

 

I have GSC S2 cam with spring and retainer ,3inch TBE and walbro 255.
Tuner was local here in Bangkok. Normally my car idles at around 900 but when the issue occurred it swings from 700-800 to 1200. Timing was not corrected with the tuned table (I log it with OBD and DashCMD App in my iPhone.) I'm wondering why the timing is not corrected with the table. <<<< I think this is weird
My tuner cannot fix this issue, he tried to flash stock 8mr rom in but the issue still occurred.
Please help!

 

Did your tuner do a boost leak test before he tuned it? I know everyone on here always says every problem is a boost leak but that's probably because almost every problem does end up being a boost leak lol.

 

Yea that sounds like a boost leak issue.