NefMoto

Technical => Diagnostics => Topic started by: pitercsg on July 24, 2023, 05:43:17 AM



Title: Wastegate dc not following idmx
Post by: pitercsg on July 24, 2023, 05:43:17 AM
Hi guys. Have a problem with my tune, when i was logging today sometimes my boost hits 1.2 bar at 5000 rpm and holds it steady, and sometimes it hits 0.7 bar and stays there. As you can see my wgdc in the 0.7bar log somehow changed, but i didn't touched any of the pid control maps. Between those 2 logs i made changes only in fkkvs, and lowered my load at 5500 and 5000 rpm by 5 units.  Is this software or hardware problem? Attaching logs


Title: Re: Wastegate dc not following idmx
Post by: terminator on July 24, 2023, 07:52:34 AM
The wastgate is closed so I don't think it's software related.

Sorry, I've just look at your csv log and wgdc is too low (60%). So it's a software problem.


Title: Re: Wastegate dc not following idmx
Post by: nyet on July 24, 2023, 08:09:38 AM
ldtv before/after missing, no PID output in your logs.


Title: Re: Wastegate dc not following idmx
Post by: pitercsg on July 26, 2023, 04:34:20 AM
Ok, had some time today and drove to take a couple logs. It happened again, but the boost is higher cause i increased wastegate preload. Wastegate dc in the restricted log semms almost the same as in the previous log. Also attaching a log when everything was fine - i know idmx there needs improvement. In me7 logger i couldn't find pid outputs, so i selected all PID maps that are there, should be enough.


Title: Re: Wastegate dc not following idmx
Post by: prj on July 26, 2023, 04:47:05 AM
Why the hell would you increase wastegate preload?

Unfuck your diagnostics in your binary, your ECU is going into limp mode, and because you probably disabled a bunch of fault classes you have no idea why.
Set anything that begins with CL back to stock.

Also obviously the rest of the tune is a complete mess. 0.7 lambda with massive amount of knock retard etc.
Good thing you're on an OEM ECU, on an aftermarket ECU there would be a hole in the block lol.


Title: Re: Wastegate dc not following idmx
Post by: pitercsg on July 26, 2023, 06:16:06 AM
Thanks prj.
I increased it because it wasn't strong enough to hold boost after 5500rpm - exhaust gas pressure opened it itself and turbo didn't want to boost more than 1.1 bar after peak. I didn't touched any of the diagnostics - only changed CDKAT and CDSLS to 0 and disabled 02's, sai and evap through ESKONF - AA   FF   00   F3   E3   FB   FC
I know about the knock retard - it don't exceeds 6 degrees. Basing on what nyet wrote, it's still acceptable. As you said, lambda needs improvement, but it's on the safe side.
Limp mode... Shit, i wasn't getting check light on, so i completely forgot about it. That's the point - i'm getting 16683/P0299 - all hoses all good, pressure tested my intake and everything seems fine. Is this faulty component in my hardware, or can be fixed in software? N75 seems to be working properly - before preload adjustment with proper idmx i had almost perfect boost curve.


Title: Re: Wastegate dc not following idmx
Post by: prj on July 26, 2023, 07:47:55 AM
Basing on what nyet wrote, it's still acceptable.
No.
Quote
As you said, lambda needs improvement, but it's on the safe side.
No, it's just not tuned.
Quote
Limp mode... Shit, i wasn't getting check light on, so i completely forgot about it. That's the point - i'm getting 16683/P0299 - all hoses all good, pressure tested my intake and everything seems fine. Is this faulty component in my hardware, or can be fixed in software? N75 seems to be working properly - before preload adjustment with proper idmx i had almost perfect boost curve.
Start with boost control linearization from scratch as described on the site. Especially after you changed the preload.
Your boost control looks like shit and most likely the problems are even worse on part throttle.

Also, when pressure testing, make sure to leave the intake manifold connected. If you pressure tested JUST the intake without the manifold connected then you could have a leak. Although the log does not suggest any major leaks, it is more likely the boost control is bad.