rotor_veux

iTrader: (3)

Hello, wondering if Apexi users would know, if I'm getting the proper readings on throttle.

I have mine connected to the pinout on the apexi diagrams, I'm also getting 4.9XX volts roughly the calculated 5V when i am complete off the throttle.

My problem:
Side note: S5 JDM T2 N374 ECU >street ported (stock)
What do we set it to? Is it simply as 4 Cylinders with throttle arrow up?

Testing I get N/G

I cannot find a writeup on 2nd generation issues besides for models before N350(s4).

arghx

iTrader: (3)

From the old SAFC instructions...

rotor_veux

iTrader: (3)

So, Their is a remaining issue but when I do "open" throttle I'm not visually seeing a change in voltage neither as it's a solid 5v, but once again as people on this site do is give me a link to the apexi neo diagrams just to show me exactly what I already know.

So if anyone could give me the easiest thing for N374-N370 S5 usage:
Does anyone know the color of the wire that is used for throttle at the ECU pinout.

I'm using Pin-16 Forth from right top row (In from top right corner) for Throttle.
I wouldn't even attempt Airflow because I'm afraid of the same result if it's wrong.
http://www.apexi-usa.com/manuals/ele...eo_diagram.pdf

Example.
(FC3Spro.org was incorrect the Red/Green works for both S4/S5 models for Speed(cruise control) The S5 n370/n374 both use Green/red in same pinout even though they have different connectors, it still uses the same wire, but even Apexi has the wrong diagram pin-out. (Opposite). *Product was a blitz ID-Power meter*

I Will try 4 Cylinders at Downward as you suggested... Much appreciated will attempt now.

rotor_veux

iTrader: (3)

It's still a no go, but it should change voltage either way, when fully open or closed but im getting a solid voltage, meaning it most likey isn't on the correct throttle pin off the ECU.

So I trace the Full wideband TPS (S5), Id asume their isn't much else I can do for my N374. *Apexi write up is for an N374 but *N/F/G*.
Black/Green - Signal (Full range), to my fingers crossed it should meet up at ecu harness as such, both short/full meetup.

rotor_veux

iTrader: (3)

Update: So, throttle full range is black/green stripe on ECU it's the same but I'm getting the usual 4.93(2) volts with constant appearance of steady voltage on and off throttle. *Asuming this is a non-compatible piece* Only thing left to do is the Air/flow Input and Out-put, once again showed on the Diagram with proper pins. Don't believe this function worked for s4/s5 either.

arghx

iTrader: (3)

The Pin you are looking for is 2G according to the S5 turbo fuel and emissions control service manual section. The diagrams from Apex'i agree with the diagrams from the service manual AND the wiring diagrams.





So all that seems right.

arghx

iTrader: (3)

Here's one that really gets people... did you hook up the two grounds exactly like in the diagram? Where you have two splices on one ground wire?

rotor_veux

iTrader: (3)

Well, asuming a ground is a ground if it isn't 100% grounded! you are screwed...

So we can asume one of the two grounds I did with "tap", type connectors is not 100% complete!

I had been told as well as instructed to disconnect the ground anyway to "reset", the ecu! which may been the correction required.

This is for a N374 ECU... but the only difference is effected though the second rotor and isn't related to throttle signal.

Well, I'll modify the harness completely being that as you said the secondary ground is 100% required. POOP

But I will say this, the rpm signal only works off the coil packs not from the ECU, this has been different from almost everyone I've asked.

1. Replace tap with full integration with soder.
2. reset with ground (gotta remove anyway...)

Thanks, if this doesn't work I'll make sure to say that N374 isn't apexi friendly.


*My A/F Ratio does reach 17, and idles at 11.5-16 (Street port)*
Only good thing about the N374 it's smart enough to run your car safely but soo rich your wallet hurts.

rotor_veux

iTrader: (3)

http://s23.postimg.org/hite81onv/DSC_0021.jpg


Pictures of exact wiring as instructed plus my handwork.
All connections tested with solid tone and readings off meter giving indications of good connections. Will connection this weekend with Results.

rotor_veux

iTrader: (3)

The Apexi Neo has worked, but! Now I need to figure it out why the Apexi Neo will not auto-correct and will cause limp / hesitation with turbo as well as harsh/stutters when leaned and viasa versa.

So in-other words, I need to do some reading beacuse Hi throttle doesnt compensate.
Good thing I used those twist connectors, as once the input and output are removed and stock goes back, it is 100% KOOL and hi throttle is corrected.

arghx

iTrader: (3)

wat

rotor_veux

iTrader: (3)

Breaking it down, with the neo installed you get driving, nothing new then you get around 3,000rpm and you hear and feel chug. Follow by lack of boost then 10.0 on the Wide-band: this is seen in all gears on nearly all pulls low and high throttle.

I Disconnect the apexi Air flow, and re-connect the stock and I get a mild learner correction that allows boost to come on slowly without chugs.

SO, without it's a stock weak boost while with the Neo on +0's it's a stronger pull followed by chugging and low rpm gain followed though by a larger gain and uncomfortable boost feeling. Which is shown as VERY RICH mix at 10.0 <> compared to stock ECU which feels moderate at 12.4 and 11.7.

Attempting to correct this results in constant 10.0 readings during opening of tuuuurbo. "3,000RPM".


In the FACTS:
Stock leaner boost
NEO, FULL blown 10.0 on the wideband and harsh with no fuel cut just pure limp and then boost, you attempt to boost as your mixture is fully maxed with FUEL.

arghx

iTrader: (3)

Are you sure your Neo is totally "zero'd out" ? There should be zero effect on anything if there is no correction set in the Neo at every speed and load points. If there is an effect happening to your engine from a "zero'd out" Neo, you've got an electrical issue.

Remember, an SAFC/Neo/whatever is nothing more than a potentiometer or a voltage clamp or whatever you want to categorize it as. All it can do in this application is intercept the airflow meter signal and modify it according to your settings.

rotor_veux

iTrader: (3)

Only things that could cause this are: Motor being Street ported
Stock Fuel pump
Knight Sports Fuel cut Dfndr
Stock Injectors.
Stock boost .5bar
Idles at high 1,500RPM 1,300RPM once warm 1,000 with accessories (Street port)
Fuel pressure regulator 40 PSI start 35 Idle

With my ECU being straight, no Neo on airflow it runs leaner and pulls weaker at a 12.4 A/F ratio (MAX 100% throttle)

With my Neo on input and output on the N374, it runs richer in Hi throttle as the Neo doesn't give me the option of turning ON the high throttle correction. *THIS DOESNT MATTER AS ITS NOT A THROTTLE PROBLEM 1% or 100%*

All throttle is the fine so it doesn't make sense: because it only is effected at 3,000rpm when it chugs at a 10.0 A/F ratio.

If I wired my Airflow Input in correctly it wouldn't idle as it effects the MAF directly:
and if disconnected the car will run fine()( in the parameters of the stock ECU)().

Only thing I could have done wrong is in a "setting", on the Apexi Neo, I selected my car and have it at 4 Cylinders going up. on EASY

Whatever the problem is it's feeling and visible at 2,900-3000 RPM when the Wideband shows 10.00 at it hits hard with no warning just a straight 12.4 or 14-15.0 DROP! 10.0 CHUG CHUG CHUG then your silly boost.

arghx

iTrader: (3)

Go into the monitor screen (or whatever they call it on the Neo) and view the airflow correction. Do you ever see it at any number besides 0%?

rotor_veux

iTrader: (3)

I re-initialized and such, but I looked and asked around for more input on the wiring, but doing exactly as the Neo diagram shows, raised more.

I honestly understand the situation but; my wiring was completely to the book, as well as my tests, but the thing acts like a turd. Unless my airflow wiring isn't sufficient I could only speculate it, as if one of the grounds is poor I would get no throttle or constant power.

In the experience of myself and "experts", Why is the grounds attached to the same source? being a questioned raised, but we knows the thing runs mint without the air signal.

Reason for that is the computers ground source, and if it runs without the neo It can run with it on that ground.

I'll buy some good connectors for the air signal soder them on wrap them heat shrink them and go again, but it does dial-in response when adjusted, so again
no problem. Maf works without it so clean their again.


I'll check in again with voltage on signals and see if theirs a drop as well as change all the settings and return them off again, as this should reveal whatever the result is.

If nothing is their I'll rip it apart and look for defects or damage to the board as that will be the only thing left to check.