XplicitlyR

iTrader: (1)

Okay, I have 10+ hours on the dyno with my tuner trying to figure this out.

1. Sent EMS back to AEM for hardware update, fixed 3k ignition stutter
2. Re-gaped sparkplugs down to 19-20 (AEM recommendation)
3. disconnected knock sensors and everything not needed for the EMS (incase i was getting a bad signal)
4. still need to put new fuel filter in but tuner doesn’t think that could be it.


What it is doing:

When I go into boost 3-4psi it will kill fuel or ignition (it is not like a misfire/ blow out) it shuts down, I have to turn the ignition off for 5+ seconds and wait for the computer to come back online before it will start again. I think it is sensing a problem and shutting down to save the motor, but after logging runs and sending the tune and logs to AEM and the tuners buddies, everyone says it looks good.

I go back tomorrow for him to mess with the fazing on the distributer, he thinks it is dropping to much signal??

here is my set up

Holset HX40 turbo
AEM EMS v2 for NA-t
AEM UEGO wideband
AEM 3.5 map
AEM AIT
PH fuel pump 360lph
rx-7 550 injectors
stock ignition
stock fuel rail/regulator/lines
Tail WG/BOV

here is a link to the build
https://www.clublexus.com/forums/per...lset-hx40.html

and a reference picture

XplicitlyR

iTrader: (1)

Any ideas?

99SC42

iTrader: (44)

Is your tuner familiar with the V2?

Has he tuned 2jz with the V2 before?

Did you buy the EMS brand new?

If all those answer are Yes , I would send the Box back to AEM and let them deal with it, it's not fair to you.

Try to get them to send you a new box!

1JZPWRD

iTrader: (59)

Thats my same recommendations. It is so aggravating when you are this close and something goes wrong.. GL.

2slowsc300

iTrader: (1)

Mine came with a base map for 550cc rc inj should b very close to your setup have you tried it

cartmill

iTrader: (3)

this may be a stupid question, but have you checked the boost cut limiter?

i say it may sound stupid because that shouldn't shut your engine off completely, but it may be related.

does it happen ONLY with boost? or only with RPM, or a combination of both?

Vrank

iTrader: (4)

^ good question cartmill, does rpm play a part? This is a plug and play ems?

Btw, we hung out at the taco cabana after cupcake meet. I have the holset 1j Cressida. Bring it back to town and let's do the dance when you get this thing knocked out.

XplicitlyR

iTrader: (1)

Update

After the tuner took the dizzy out and re-set it (off one tooth) them he set the timming using AEM wizard it will do full pulls at 9 psi, but when I turned it up to 12psi it cut off agin.

I sent all your questions to the tuner. And am setting up an appointment as soon as some of his timer friends get back with him on there ideas as well.

Thanks guys for the input, FYI he wants me to go back to V1 but I like my A/C and cruise control.

XplicitlyR

iTrader: (1)

as for the boost cut limiter IDK, I'll look.

it's not really a RPM thing, I can creep up on speed and do fine, it's only when the boost comes on.

99SC42

iTrader: (44)

The A/C works with the V1, not sure about the cruise control because i always deleted mine.

XplicitlyR

iTrader: (1)

I finally got AEM to send me a new EMS, and all is good now..... Going to Noribuilt today to get the final tune......

99SC42

iTrader: (44)

^^ Very good ! I am 100% sure something is not working properly in the box. GL with the Tune.

Ali SC3

iTrader: (10)

I had an aem v1 box and the a/c and cruise control worked like factory. glad its working, but you dont have to spend the extra coin for a v2 for those features.

the v2 gives you 6 coil drivers for sequential ignition which is nice if you have 6 coilpacks like a GTE.
The V1 only has 5 coil drivers, so to run coilpacks it runs 3 drivers in wasted spark for 6 cylinders.
But since you have the stock dizzy you always have 1 coil with sequential ignition (distributor deals spark out in order) on both v1 and v2, so it doesn't make a difference.
Alot of us strongly believe the vvti coils are a better route than gte coils anyways, making the extra features on the v2 not worth it because tuners are less familiar with v2, although they have very similar tables but everything looks different.
The v2 does have some other features though which can come in handy, but that's a different discussion.

Studiogeek

iTrader: (6)

Bump from the dead!

Exact same issue here!

I hope they replace mine!