RX7.0

Well, I figured out the root cause of all my tuning issues....

I got the E8 wired.
Stabbed the CAS.
Faught timing issues.
Scrapped with the notorious staging bar stumble.
Tuned all the A/F and Timing as well as correction maps
And after working out all those issues (plus 20+ hours of tuning), I STILL had no power from the engine.

The car would pull pretty good until 3K RPMs and then it was like I was riding a moped. NO powa!! WTF?

After lots of troubleshooting and triple checking everything, I resorted to the thing I should have used first....

Datalogging!!!!!!!

After logging all the variables I could think of, (in various driving conditions) I found that around 3k RPM, my "trigger since last home" would fluctuate.

I had already found the most reliable settings on my filter and gain, so I just replaced the CAS with one of my spares. Eureka!!!

I got powa!!!
It's never run better!

Lessons Learned:
1. Trust your tools, not necessarily the procedures. (in my case, stab the CAS per HITman, use his settings as a default, and trust your timing light to get the best numbers)
2. Research! (most default maps are a starting point, and NOTHING more. To fix my staging stumble I followed the logic of a guy on teamfc3s and set the stage bar to 13, not the 11 in most default maps. Mind you, I did some work on the extra load bar too)
3. DATALOG (you can't catch everything with the tuner page and the map) datalog everything and you will likely find your problem.

RX7.0

Also,

Please no ego posts.
I'm sure plenty of you knew these things.

I'm merely documenting my mistakes so others can avoid them.

crispeed

At least you were honest to admit your mistakes. Most others would not and blame everything or someone else.
For that you have my respect!

The extra load bar is what all the older Haltech ecu's were missing to make staging perfect. The extra load bar is very easy to tune if you use a dyno with an innertia brake that way you can actually load and hold the motor exactly where you want to tune it.
And you're 100% correct about datalogging. That's what tuning is all about.

slo

iTrader: (1)

Hey I'm just curios on this one. Did you initially hook up the CAS wrong, and give it 12v, by hooking it up like an E6k?

Could that have damaged it?

RX7.0

No,

I verified the connections on this forum and Haltech's before wiring it up.

In fact, you posted in my thread where I confirmed the wiring.

Anyway, I should have known that there was something up with the CAS, since I had to set the gains/filters excessively high to get a clean signal.
What I DIDN'T do, was verify that clean signal at higher RPM and that's why I went through all the heartache.


I don't know the exact answer to your 2nd question, but I would say, "I don't think so"
The only damage I could imagine would be to the Haltech if it couldn't handle a near-12V signal for the home or trigger(depending on how you hook it up)

slo

iTrader: (1)

Hey there is a procedure for testing the cas in the FSM. I think off hand that it is looking at resistance.

javrosario

iTrader: (5)

You know, the cas can be adjusted too. You ca n move the triggers sensors inside of it closer. Sometimes they are out of specs. I did that to my friends and it fixed a lot of problems it had.

RX7.0

OK, in that case, I won't throw away the old one.

Were his symptoms the same as mine? (good trigger and home at idle, but not above 3k RPM)

rx7lover0147

where can i find how the hitman style info?

RX7.0

For the E8:

https://www.rx7club.com/showthread.p...49#post5565849

See the first and fourth posts.

davedge

Good work. The E8s have both "Common Mode" staging, where it uses the previous methods(E6K/X series) where it will go up to the staging bar and the secondaries will turn on regarless of the previous ms of the primaries... now with the "Primary Hold" mode, the ECU will continue to fire the primaries through the staging point, and that is where the additional load bar comes into play. You can start firing the secondaries at a very low ms time, and bring them in for a very "seamless" injector staging... also, you can tune the primary disenrichment, where you want those primaries to begin "tapering" off, once the secondaries kick in...

Also, try using the Injection split angle. At lower air velocities, the time it takes for the secondary injection to catch up with the primaries will be increased... so what we have provisions for, is to fire those secondaries advanced before the primaries so you will have a more controllable A/F mixture...

Using the E8, there is no longer any reason that you should have a stumble once your staged injectors come on...

javrosario

iTrader: (5)

it didnt' rev too good after 6k, it hit like a wall, and it detonated a few times. We hurt the mtor trying to figure out the problem.