SR20DET won't rev past 3.5k rpm

[MJG]

I have installed my new DET3 and on the first test drive, after a few basic issues, I noticed the car missfired when trying to do a dyno pass. Some more trials and review of the logs show it just cuts out at ~3500rpm. With no load, clutch down and gentle reving the engine makes the familiar "bam bam bam bam" type noise, as if it was bouncing off an intentional rev limiter.

My settings are all identical to a friend who has an SR20DET, wiring is as-per the instructions, I have a wideband installed in analogue 3, analogue 4 is grounded. No spikes indicating a power cut. Sometimes the log shows a high AFR (18+) sometimes a low one (~11) immediately after the cut, but the constant is that the instant I feel a cut in power, the internal MAP sensor signal goes straight down to vacuum.

I've tried shuffling around the connectors and running either/or the CAS (cam angle sensor) or the MAF as factory, or through DET3, and have determined that it only does this when the CAS signal goes through the DET3 unit. If I run just the MAF through DET3, it runs fine.

If the CAS wire is broken totally, then the car doesn't even start up. So I know the connections must be OK and the engine gets some kind of signal through the DET3 to tell it to start and run fine. It just for some reason doesn't rev above 3.5k.

My launch control option is disabled, and nothing is connected to trigger it, but perhaps there's a glitch in the software and launch control is actually enabled? Perhaps if I "enable" launch control, then "disable" it again - it might jog the DET3 into coming out of this mode?

[MJG]

I tried re-enabling and then disabling the launch control. Still the same.

The launch control does sound similar to this issue though, as when I dropped the LC to 1500rpm or 3000rpm (below this particular issue) it did work as expected and make the bambambambam noise.

So I'm completely baffled! Hopefully it's just a simple wiring problem and shit connection but I hoped that'd present itself more obviously.

[MJG]

Tried another known-working DET3 unit with my project loaded, works fine. Tried my DET3 unit on a friends working car, with his DET3 project loaded - doesn't work properly (he has done MAP conversion too).

So I've confirmed there's something physically wrong with my unit.

The dealer is happy to accept the unit for repair but has asked (maybe he's on here?) for a firmware update first to check that's not the issue.

Is there a physical file with "firmware" on it? I've tried updating it so I'm happy with what buttons to click etc - but not sure what version it should be on for the latest, and I can't find any information on the firmware or what file to "open" when I try and update the firmware.

Any help at all?

Cheers

Mike

[MJG]

Just searched the forum and I was doing it right, does anybody have the latest (1.32 software beta) firmware number that should show up when looking in the "FW version" thing?

[Kisielisodd]

http://ecumaster.com/testVersions.html

[MJG]

Thanks for that - I found it now and was updating it right. I've just updated FW to v1.32 and no change - so unfortunately I have to send my DET3 back for repair/replacement.

I am very excited to get a working unit back though, even after limited experience with mine. I love it!

[MJG]

Adam, the DET3 supplier has fixed my unit and replaced an amplifier inside it. Now it works perfectly! yay!