Emanage: low injector duty cycle - Page 2 - Tuning Forum

Forum Post / Reply
You must log in before you can post or reply to messages.
Re: Emanage: low injector duty cycle
Saturday, July 30, 2005 6:02 PM
Ok I'm really getting sick of this. I took the car out again today after double checking all settings and connections, STILL 10% normal inj duty cycle. On top of that, I have that stupid resistor installed and its great. I drove the car for an hour just now and the check engine light didnt come on once. Then 5 minutes later, start car up and check engine light is on. Code readers says!: PO107!!! WHY?!??!?!

Screw this emanage I want something else that actually works. Megasquirt looks like a bigger pain in the rear so someone help me out here...

Re: Emanage: low injector duty cycle
Saturday, July 30, 2005 6:07 PM
SAFC and FMU? If e-manage is such a pain, why not use devices that actully work for our cars ? that do the job just as good and is cheaper too?
Re: Emanage: low injector duty cycle
Saturday, July 30, 2005 6:13 PM
Ok cool.... i know nothing about the SAFC though. My pt turbo (hahn kit) just uses afpr and an fmu and its fine. Yea if this week I can't get it figured out, the e-manage is hittin ebay.

-Bob
Re: Emanage: low injector duty cycle
Sunday, July 31, 2005 12:40 PM
is anyone hooking the injector ground up????????
Re: Emanage: low injector duty cycle
Sunday, July 31, 2005 2:08 PM
Yes it was hooked up in mine.

I just bypassed my emanage and my check engine light is gone and the air fuel ratios are better so idk maybe my ECU, injectors, and emanage hate each other. Regardless I'm done with emanage. Its a great tool, but theres no support for us GM's.
Re: Emanage: low injector duty cycle
Sunday, July 31, 2005 2:22 PM
hmmm....with most cars a 12v signal is used to open and close the injectors. on GMs, the injectors receive a constant power and the computer sends the ground as the signal.
Re: Emanage: low injector duty cycle
Sunday, July 31, 2005 3:58 PM
I thought all injectors were triggered by the ground an not the power.




Re: Emanage: low injector duty cycle
Monday, August 01, 2005 7:49 AM
mohd's site has wonderful emanage manuals of all sorts. and what you can't find there you can find on the yahoo emanage group.

the only one problem we are facing, and only half of us (the low impedance crowd) is the injector pulse-width display. why is anyone suggesting an s-afc? the emanage is that and much much more. and s-afc at best is just an airflow converter, it will not extract an ounce more of fuel out of the injectors than the emanage. (much like the emanage airflow map, or injection conversion map, hell you dont need a laptop to turn the emanage into an s-afc). and fuel pressure adjustment (fmu or any rising rate afpr) will only get you so far.

so what is the real problem? do you really think pulling extra fuel by duty cycle is going to cure your lean fuel problems? i am sorry to disappoint anyone who believes this, but the GM ECU is already running injectors full open (~85, or close enough to it that there isnt much more to give.

those of you who are running lean with the injectors you own, need to reevaluate how much fuel is required, please run a fuel injector calculator to estimate the very minimum size that your application will require. i think some of you will be very surprised to learn that anything less than 400cc injectors will hold anymore than 225-250 crank hp. i dont know about your specific application but i make that at a measly 6-7 pounds of boost. (216whp at 6psi). hell my 550cc injectors at normal fuel pressure are leaning out at 13 pounds of boost!

what i am trying to say is there is no reason to be mad at the emanage because it cannot read low impedance injectors (which i'm sure if i cared enough to require those extra milliseconds of duration, i would have already found a resolution). rather i urge you to consider reevaluate your current fuel system and add more fuel that way.


emanage manuals


________________________________________________

...bone stock
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 10:45 AM
Thats not what people get the SAFC for. They get an FMU to raise fuel pressure when theres boost. The SAFC is to fine tune the fuel curve (by taking away more than anything). The people I've talked to tune the car fairly rich using the FMU, then take a little fuel away with the SAFC.

I was getting a check engine light with emanage (even with resistor in place, voltages were normal, still got it), it was only reading 10% of my injector duty cycle, the car idled like complete crap (even with the antistall setup), and I was quite annoyed with the software on the support tool. I WISH it was like at 1 psi of boost at 1000 rpm, do this. No instead its voltage and you have to convert it and it doesnt even end up going in increments of psi. I bypassed mine and the car ran like a dream... stock computer was doing quite well... car idled and ran perfect, no check engine light, good air fuel ratios up to 5 psi of boost so I still need to add fuel but it was worse with emanage hooked up. I didnt just give up I've been messing with this thing for 3 months and thats enough... I want to at least take my car to the track once this summer.

Good luck to all of you. The e-manage is a great tool theres just no support for us... at least not that I could tell. I'm not dissing the e-manage its just not my cup of tea.

-Bob
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 11:11 AM
geekd, I have bigger injectors but that's just a band-aid it doesn't solve the problem. I don't like spending $400 for the Emanage and harnesses to have it half work, what's the point from your earlier post it seems that you are only using it as an SAFC. All you are doing fuel wise is removing fuel(from your earlier post). I intend to figure this out and if I don't I'll get the JBody Performance reflash and get the MSD to controll timing.





Re: Emanage: low injector duty cycle
Monday, August 01, 2005 1:34 PM
mike: since when do purchasing bigger injectors become a band-aid? that is the entire point of purchasing an emanage, to bandaid your stock ecu to run bigger main injectors. and how does an emanage become only half useful when i can tune my entire fuel curve, on and off boost, as well as play with ignition timing?

mike if you believe running the additional injection map will squeeze a *magic* amount of fuel from the injectors by adding pulsewidth you are entirely mistaken. do keep in mind i have personally seen on a gm tech 2 diagnostics tool that dutycycle hits 85% slightly over 6000rpms. so go ahead and see how much extra fuel you can squeeze out with the emanage.

fuel injector calculator

the point of the emanage is INDEED to act like an safc, but on a much higher level! with a 16x16 airflow adjustment map, it is far more complex then an safc.

but mike maybe i'm not understanding your requirements with the emanage, or perhaps you have just yet to learn to to achieve the goals for your specific application, hell i learn @!#$ all the time on how many ways you can achieve a certain AFR with the multiple maps provided inside the emanage. but please do ask what ARE your SPECIFIC goals using the emanage? add fuel here, pull timing there... etc




________________________________________________

...bone stock

Re: Emanage: low injector duty cycle
Monday, August 01, 2005 1:45 PM
Bob: it sounds like the emanage is the cause of all of your problems? is that so?

go over all wiring, remove those resistors if they aren't doing anything, finally reflash the firmware and reset the emanage. if something is still wrong you are using an incorrect install diagram.

remove the anti-stall that will make things much worse.

please lets not mention silly solutions such as fuel pressure risers. if we need those, your injectors are much too small already.

bob, mike how big are these injectors you are working with to require additional fuel already? how much boost on what sized turbo are you running?


________________________________________________

...bone stock
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 3:11 PM
Uhm Geekd....are you on crack?



Re: Emanage: low injector duty cycle
Monday, August 01, 2005 3:21 PM
I tried all the above what you said. The resistor on the map wasnt working i tried several resistances. I don't like using the emanage its out of the car END OF STORY. I decided to do something different that I KNOW will work. I'll be doing something VERY similar to the HAHN stage II kit on my other car.

And, I have 320cc injectors, aeromotive afpr, t3/t4 turbo doing about 9psi. I know this setup will work fine with the FMU and cartech and wont require hours and hours of troubleshooting.

Thank you and good night
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 3:42 PM
I just seemed to find out that geekd is only using the airflow map....as means of tuning out fuel from having larger injectors....

Mike is correct...hes just band aiding the issue.....sureyou can use the airflow map but why when you can use the additonal injection map like so many already are....

Yes....you can read the injector cycle correctly thru a tech 2 but for a strange reason it isnt reading it correctly thru our emanage/laptops.....thats the issue at hand....

But honestly he seems to think he knows everything about it.....when like said before...hes only using the system for half of what it can do....



Re: Emanage: low injector duty cycle
Monday, August 01, 2005 3:53 PM
i guess i upset someone

if anyone can read my last post, you will see that there is no head room for additonal fuel injection. in other words using additional fuel injection cannot replace small fuel injectors as jay likes to believe.

oh by the way if you consider a nice 11:1 air fuel curve and advancing timing on 100 octane 'half' of what a, mind you, piggyback fuel controller can do, then sure i guess its only half.

i guess the other half is frying injector coils


________________________________________________

...bone stock
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 3:58 PM
Bob wrote:

And, I have 320cc injectors, aeromotive afpr, t3/t4 turbo doing about 9psi. I know this setup will work fine with the FMU and cartech and wont require hours and hours of troubleshooting.

Thank you and good night


i hope your not referring to the ld9, because 9psi on a properly sized t3/to4 should be ~250whp.

hey, math really works!


________________________________________________

...bone stock
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 4:01 PM
username / password : jbo


________________________________________________

...bone stock
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 4:11 PM
Quote:

Uhm Geekd....are you on crack?
Jay that is not nice at all. If there is anybody I seen that knows how to self tune the emanage on a Jbody its Dave. He had emanage on his car before just about anyone on this site.


<img src="http://img.photobucket.com/albums/v292/dragmyz24/shoppedcav2.jpg">
Rush Racing http://www.gettherush.com/
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 5:23 PM
You cant use that site without logging in. No I'm not talking about LD9 I have a super60 on my 3 cylinder metro and emanage wasnt cutting it.

LOL... regardless if I need I'll get bigger injectors. I don't care, e-manage was not for me, thats all IM sayin. I do understand what youre saying with the stock already givin 80% to the injectors, and what youre saying does make sense but like I said when I turned up fuel pressure to 40 psi even the air fuel ratio was well under 13 under boost, but like I said now I need something to correct idle if I go that route and I'd rather do the FMU so during idle I wouldnt have that unnecessary fuel pressure.

-Bob
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 7:05 PM
Hey bob, what pressure do you want your car idleing at. You do know that stock is around 43 psi. and you're saying you turned it up to 40.... That doesn't sound right at all.

Re: Emanage: low injector duty cycle
Monday, August 01, 2005 7:16 PM
Wont idle for crap with bigger injectors and fuel pressure up there. Idle fuel pressure right now is 33, when I hit gas it goes to 40.
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 7:30 PM
You must have other problems then, i run 42# injectors on my 2.2l ohv and it will idle just fine at 43 psi, granted for tuning reasons i have it at about 38 psi. i don't see any reason why a 2.4 wouldn't be able to idle fine with some 320 cc injectors. something doesn't seem right to me.
Re: Emanage: low injector duty cycle
Monday, August 01, 2005 8:30 PM
Well... that was with the emanage in. Tomorrow I'll turn it up a little bit and see what happens and I'll let you guys know.
Re: Emanage: low injector duty cycle
Monday, August 08, 2005 4:24 PM
So has anyone gotten their Emanage to show the correct duty-cycle. I was looking at the Greddy wiring diagram and it shows the red/black wire on the injector harness going to the Injector ground. I was under the impression that the injectors had a common power source and the ground was seperate. If I'm wrong let me know.





Forum Post / Reply
You must log in before you can post or reply to messages.

 

Start New Topic Advanced Search