So these injectors don't seem to be the most popular as trying to find data on them is very difficult.
I spent the summer tuning the car and with everything set in the log I have linked the car idled great and it cruised great. This was all done following the guide "tuning a 1g sd car with no maf"
The car is still cruising great but the idle is really rich, afr is sitting around 12.
Before I go adjusting the SD table with CombinedFT I was hoping to get some comments on my injector setting. Oh and my front02 sim is not cycling.
Global = -48.8 and deadtime = 45
https://www.dropbox.com/s/qylj50qtfgg1unx/log.2013.12.28-01.elg

I have not had a chance to look at your log but your dead time at 45 sounds very alarming to me. The larger injector the more dead time it needs. For example RC550 needs about 180 so your 1000cc needs to be way above that mark.

looks like you need a firmware update. check out this thread:

ecmlink firmware thread

The [CombinedFT] and [LTFT LO] suggest there are problems in your tune. I would most likely blame your injector deadtime for this since it mostly affects low RPMs. Things get better as your RPMs go up and [LTFT Hi] are at normal -2.5%. [CombinedFT] and [LTFT LO] are dangerously low at aprx -13% to -30% at lower RPMs. Negative means ECU is pulling fuel away from your injectors which means you are spraying way too much fuel. I think max is 20% in both directions on what it can compensate.

Lets start with your deadtimes. why 45?

Hm ok I will do the update later, i didn't think I was that behind.

That's what I got to when tuning, if your STFT Lo is negative that means I need to lower my deadtime. I even started my injectors in the 350 range and after tuning ended at 45.
I got to my global through wot tuning, so either these injectors don't flow anything near what they do. That's why I am getting frustrated with them.

Just noticed my SDAirflowPerRev, so I am thinking I can go ahead with make the SD changes. I just want to know if anyone else has the same issue I am having with big injectors.

I recommend you stay away from WOT tuning until you get idle/cruise straight out first. I am also running big injectors similar to yours as well as Terry S. I've noticed your pump is set always on. why?

Overall I think your setup is complex to start with. You have SD and front O2 simulated from wideband. Do you have an option to use stock MAF just to get things under control again?



That's why I always recommend to start with idle/cruise first. Your ECU can compensate your tune mistakes so you can't blow it up easily. At WOT fuel compensation is disabled. As said many times before, mechanical problems will cause tuning frustration. You'll need to be absolutely sure your fuel system is working properly and there are no major boost/vacuum leaks. Faulty FPR, FP Gauge, or leaky pump o-ring will cause fuel problems.

I would first reset your SD table to defaults (use stock MAF if you can) and start tuning only with Global & deadtimes.
You want your [CombinedFT], [LTFT LO], and [LTFT Hi] stabilized first and than you fine tune them with SD table. Try getting them within 5 to 7%(+-) average first.

I had idle/cruise down great during the summer. Just for starting purposes and for when I want to check fuel pressure.

I am thinking about putting in the stock maf or Terry has offered his 3" so I may do that and setup the table using those.

Ok looks like that the best option so far, will look into getting a maf hooked up and setup my SD table like that, when I originally made the switch I just did it cold turkey.

Is your idle always at 12:1?

My idle is at 12:1 a little after initial startup, then after driving, the idle goes to where it should, around 14.7-14.8:1.

Also, on my first pull, the afr's go to about 10.0:1, but are fine thereafter.

Do you get that too Bryan?

It is now, but in the summer everything was perfect.

Is it your tipin?

Could be the tip-in. I was playing with the adjustments and its been getting slightly better, but after the first pull, it's fine. Have to fix the exhaust before I do anything else though.

Your fuel trims are out to lunch. And your airflowperrev needs some work.

Have you actually had those injectors flow tested? I can get them done for your for like $40.

In that log you global fuel is set to -48.8 = 879cc.That's way lTFT LO is at -12.5%. So put the right value for 1000cc injectors and start raising global dead time . As for wot after idle is set properly (fuel trims) you have to make changes to SD table. You do not tune to sd table .

No I haven't Stephan, I don't have my 450s anymore so I don't have anything to run with if I take these out.
I think I might just take the maf route, it's going to get my SD table perfect(at least I hope) and in the process my fuel trims should be setup well too.

Jroslaw, if I didn't spend hours tuning my car in the summer to line everything up I would agree with you. You don't make changes to the SD table if it means that the SD table is going to have values well over 100.

Do you have a log of when it was running well to compare with?

Yeah give me a few hours, I will go through my logs and link one.

Bryan, did you check this? There are several spots in your posted log where the injector pulsewidth is constant 1.3ms.

The end of this log shows the car running well in the summer.

https://www.dropbox.com/s/n6sgfoqywgmlb2t/log.2013.06.03-02.elg

Thanks Rob and Nick, I didn't realize this was an issue. Rob thanks for calling me on that one, haha.
Will do an update today before I head out and then go for a cruise and see how it looks afterwards.

ok upgrade is done, will let you all know how today goes.

Any updates? New log? The new firmware will let your ecu use injector pulse widths less than 1.3ms if required, but doesn't explain the low airflow numbers etc.

I didn't end up going out last night, I will probably head out in a little bit and post up the log.
Thanks for the help guys.

Should be fun in the snow

Your global and dead time are very different in those two logs. Why did you change it?

I think I did a return because my STFT wasn't around 0 anymore
I think today I will be doing some tuning, and enjoying the snow

Alright here is the log from today.
https://www.dropbox.com/s/6mu4pww7p7dbrau/log.2014.01.25-01.elg

two things I'm going to suggest to start with. It looks like you have a vacuum/boost leak. Idle is high and surging with ISCpostion at 0. It would be best to fix that. Second, contrary to that article written by highboost, the loadscale should be 100% for a 2L. If you follow the history of where the 114.8% number came from, you'll see that a bug was found in the code, and when the bug was fixed, they needed to put that value in there to prevent people's tunes from changing during a firmware upgrade. Anybody starting from scratch with the newer (bug free) firmware should just use the proper value.

You said you adjusted global fuel based on WOT which I agree with in general, but it looks like you may be compensating for a fuel delivery problem with a global fuel value that is too large (less negative). this may explain the low deadtime and low airflow/rev at idle. Do you have any way to monitor or log fuel pressure?

You have your idle switch enabled and simulated by tps should probably fix that. Get just an idle log set up idle before you start cruising.

Nick the boost leak is the throttle body so I am going to get that fixed soon cause I keep putting it off.

Hm, I am hoping that it's not my fuel pressure regulator, I have not been having much luck with them. I currently don't have anything to log it and was searching for a way previously to do so with link but it seems not many people have done this.
The other thing I can think of is the issue with broken studs on the sending unit, but from what I can tell when filling up the tank, it is sealing.

Ok I will disable the idle switch and just have it simulated. Ok will grab an idle log and see how that looks.

Only reason I brought up the fuel delivery is because as Stephen mentioned, the settings from last summer are quite a bit different, so I figured you must have changed it for a reason. Those settings from last summer appear to work better at idle and also look more "normal".
If you can't log fuel pressure, you can at the very least test the AFPR once you set it by applying both vacuum and pressure to the nipple and make sure fuel pressure raises and lowers accordingly. (I'm assuming you have an AFPR with gauge)
What's your fuel setup?

Good call nick, I will give that a try and see if that work, will need to figure out a way to add some air pressure to the afpr, in a controllable way.

ECMLink lite
RC 1000s
Fuel lab AFPR
-6 an tank to rail (with aftermarket filter)
Walboro 255 hp

Ctc.... search vacuum pump. You can probably find them at PA aswell. But make sure it does pressure and vacuum.

Well I just tested with just boost, using the compressor and everything looks good.
I will go take a look at CTC for a vacuum pump, also going to start fresh today and see how that looks afterwards.

Ok well i just did a search and this is saying they should be what I have (let me know if I am reading it wrong)
http://injector-rehab.com/shop/lag.html

Also found this
http://www.dsmtuners.com/forums/newbie-forum/381281-rc-1000cc-global-deadtime-settings.html

Vacuum is easy.... start the engine.

And only if they flow right. Were they brand new?

LOL well than I am good there!

No they weren't brand new but I was told there was only 5000k on them, there were from Sven.

Also I remembered why the logs I gave you were different. After that summer one I was doing a bunch of WOT tuning and trying to get my AFR lined up with the est, the global that it's at now did that.
Maybe when the roads are nice and clean I will do another WOT and see if that is still the case.

Do you have a log of thoses pulls?

Here is the last log of the month the pull at the end lines up through the pull but there are still miss matches through the rest.

https://www.dropbox.com/s/ap1nw4i6vuobp8f/log.2013.06.17-04.elg

The one thing I can't quite figure out is why both logs from the summer show injector pulse widths of about 1.4ms to maintain idle, but the one from a few days ago shows 1.2ms. That's a big difference. The cold weather might have some effect, but I wouldn't think that much. Is it possible your wideband needs calibration? Do you have a good factory o2 sensor you can put back just for idle and cruise tuning? So you've confirmed from the tests above that fuel pressure drops by approximately 10psi when the vacuum line is hooked up to the AFPR with the car running?

Yeah it's possible that it needs calibration, I can do it tomorrow and see if that makes a difference.
I am not sure how to wire it in if I did that, I cut the line for the stock o2 to put the wideband in.
I will double check again it drops about 10 (it's supposed the be a half psi for every hg of vacuum right?)