what firmware do you have ?

 

ive been using version .99v iirc right now which is the very first when it came out.... my car will start up instantly or it may take 5-8 seconds to start ...

 

I'm using the latest firmware out. My ECU came with v1.14 already installed.

 

yeah i got the 1.14 damn a/c is getting on my nerves!

 

What serial number was your box? I have #029 and it came with v12... and I thought your serial was lower than mine which I find strange if it came with v14 and mine v12.

 

my box is 260 came with 1.14

 

I'm sure mine was one of the later boxes.

 

I have #017 and came with v12.

J. Church

 

Just to update.

AEM suggested I try a different cam sensor as it appeared mine was dropping the signal periodically. Looking at the internal log carefully I did see where this happened and the crank sensor would then have a small spike and right after that the car would cut out then come back on then cut again. I ended up using a cam sensor from a well running car and noticed the signal was cleaner with a constant swing up and down. I then tried a full throttle pull and no cut out and I tried several times and didn't get the cutout. I instantly purchased a new sensor for the car which was even smoother/less peaky than the one I used to test with.

NOTE I experienced no cutouts with Series 1 so it would appear Series 2 is more sensitive, arguably a good thing in this case.

Next is tip in misfire that I did sometimes experience with Series 1. I was hoping with the new found cam sensor issue that would go away but it didn’t. It is more pronounced on Series 2 than Series 1 so now I think something else may be going on; maybe the crank sensor has a weak signal. I’ve sent another internal log to AEM to analyze. This leads into the next issue…

Cruising in vacuum the car has a slight miss off and on (but fairly constant) that is quite annoying and causes drivability to suffer especially at lower speeds and lower gears. It does NOT do this at all in positive pressure which makes me question if there really is an issue with the crank sensor or is it the Series 2. This I did not experience in Series 1 at all (besides the well documented issue between 2000-3000rpms that some cars had). In Series 1 I can pretty much run out 1st and 2nd gear fairly slowly with minimal surge considering the big cams my car has. This I won’t try with Series 2 because a steady 4th gear it has a “bounce” to it randomly so a lower gear would most certainly end up fairly violent.

I still have to use the Series 1 calibration for the coolant sensor which is supposed to be wrong since there is a pull-up circuit of some sort in the 6310 & 6320 boxes. I’ve sent some information to AEM about the readings which didn’t match the two expected readings they said it should be.

Startup still just plain sucks 95+% of the time still even with the new cam sensor. When it does work as I have said before it is as good/better than stock ECU.

Lastly, graphing the car in VDR it is down considerably (60hp) on power from Series 1 running the same boost and timing but the curve is the same. I haven’t investigated this yet because the other issues are a more important than making the same numbers. I’m hoping timing sync is just a tad off compared to Series 1 but still 60hp is quite a bit to make back up.

 

Could you point me into the directions of the documented cases of the 2,000-3,000 issue. That is my problem and I cannot get rid of it, and like you said it makes lower driveability speeds SUCK.

 

"Well documented" was probably too strongly put, it's kind of a long standing word of mouth issue. David Buschur made reference to it in his Series 2 thread a while back saying it was gone in Series 2 when he tested it. I believe it's been mentioned on AEM Forums a couple times as well.

https://www.evolutionm.net/forums/ev...ing-video.html

My car has always done it on Series 1 and it was more of a leaning stumble type of thing on my car in the 2400-2700rpms the most. I do have one Evo I've tuned that doesn't to it at all on Series 1 but that’s the only one I've seen that way. It's always been dealable, just was a little annoying.

 

See mine never did it with Series 1, and numerous series 1's i have messed with don't either.

My series2 has done it since day one and i just don't understand why it's doing it. I have no sync issues or timing issues. I can't even see in the logs where it's doing it.

 

Stat sync for me turns off then back on occasionally in the logs while cruising. It was worse pre cam sensor change but it is still doing it.

Are you pulling an internal log to check, because I thought the USB logging being so much faster (and it's visually noticable compared to Series 1 serial) I simply looked at that and it still wasn't fast enough to catch the stat sync and cam abnormalities I was having.

 

Anyone hear any news from AEM about when we can expect the next firmware update that addresses the idle motor issue? It's been over a month since I picked up my Series 2 box from them at their HQ in Torrance, CA. At that time one of the AEM engineers said they were going to release in a couple weeks... it's been over a month now.

 

Yes, I just started running it for testing purposes. Initial results are looking good. My car has fired up every time I try to start it and idle needed retuned from the V14 firmware. I noticed idle was a lot more stable and turning A/C on needed a lot less compensation. I tried several on off cycles without letting the ECU power down and the car fired back up every time. I am taking the car to work today to test more but so far I really like what I am seeing...