Link SD is owning me.

[tenn-gsx]

I can get a good idle but the thing wont stay running once I rev it unless I play with the throttle. I have no fiav or isc. I can use the biss to move the idle anywhere between 500-900 rpm. Lower and it wont run and it WILL NOT idle higher. Just look it over. I havent touched link in 2 years aside from trying to get this car running properly and Im failing. All comments welcomed and appreciated.

I know the trims are a little off. I have fixed that.

 

[snowborder714]

Can you post a log with the latest tune? Can you, in addition to the idle, include a bit with you revving it to show where the problem is?

Have you got the AirFlowPerRev and AFRatioEst in check, in addition to the fuel trims?

Are you aware you have a DTC code?

I see your target idle in link is 1100. What are you really trying to get?

 

[tenn-gsx]

Airflow per rev is a little high I THINK. Its about 36-40 depending on rpm. AFR est is pretty much dead on. How do you look at DTCs when its a saved log? No I did not know I had a dtc. EDIT I found the DTC and its not an issue. Im running the one wire saturn alt mod.

Im actually shooting for 900 or so RPM. I had messed with that to see if it would make a difference.

 

[snowborder714]

There's a DTC tab almost at the bottom of the window

I would definitely work on getting that AirFlowPerRev down to around .28.

You should also fix the Load Scaling value in the DA tables since you're running 2.3l engine.

 

[daplatano91]

Your going to want to adjust your tps as well. At idle you should have .63 volts and you at about .67 and its showing 1% throttle at idle. I also see your telling link that your using an omni 4 bar map sensor for speed density but you have a gm 3.3 in your pin assignment. Your going to have to bring your airflowperrev down to .25-.28 to see what else needs to be done to correct your fuel trims.
I can also see you being limited by link for those injectors. The max fuel adjustment is -75% when in fact the 2150s need -78%.

 

[tenn-gsx]

OK Im running e85 so 1800 is roughly correct for the dead time. I thought that when running a 2.3 the airflow pre rev should be 33-35? Again I thought that was the correct load scaling for a 2.3?

 

[snowborder714]

According to the change log, you can adjust properly for 2150's, unless I'm not understanding what you're saying. (see 3.21.109)
v3changelog [ECMTuning - wiki]

If you look at the sensor assignment for the MAP sensor, you'd notice the Omni sensor on the Baro input is the one that is used.

The load scaling (according to the notes at the bottom) should be 87%, or .87. It might also be 99.6% depending on what firmware version you have. You can read a bit more about this on the link forums.

 

[daplatano91]

Load scaling for 2.3 is 87%.
2.0/2.3=.87 or 87% that's actually quoted out of link in the description box.
I definitely missed the baro input when I looked.

 

[bsbllfit7]

i know this may be redundant but boost leak checks? You hadnt said i dont believe if you have performed a check or not so i was just trying to get that out of the way. Also your timing at idle in your log looks a little high. Usually you should see around 8-12 with base timing set to 5 degrees

 

[tenn-gsx]

Yea I read about load scaling somewhere else and just did my math the wrong direction.

I have done a BLT and snug as a bug up to 30 psi. Im running the EVO8timing map if that has much effect on the timing. Ill fix the load scaling tomorrow.

Besides I dont think a boost leak will effect timing much when running SD will it?

About the tps. When the car is not running but key on and logging it shows .63. Soon as I start the car it goes to .67. Is this from voltage being higher when the car is running or vacuum pulling the tb butterfly open a hair?

 

[bsbllfit7]

so couple things i noticed from the log, 1. car wasnt at full operating temp (just to help us determine what the ecu is really seeing), 2 the timing seems to be rather high, 3. combinedFT is a little higher then it should be, and 4. loadscale needs adjustment

 

[tenn-gsx]

Car is at operating temp during the rest of the log this clip is from and it has no effect. I keep the fans on all the time and it keeps the car between 190-193. (at Idle) Fans off in a garage 120 deg it stays at 206.

Thanks so far guys. Keep them coming. Im not discounting things that your saying just thinking in type so that if my thinking is off you guys can catch it and correct me and ill understand better.

So far as I thought........ my SD tuning skills are trash.

 

[bsbllfit7]

what CAS are you running. A 1g or 2g?

 

[tenn-gsx]

1g no cps. Timing is dead nuts 5 deg before.

 

[bsbllfit7]

hmm i wonder whats throwing it off then because in the DA tables its going between cells with 5 and 12 shouldnt get higher then that. Im just thinking out loud for the real pros on here.

 

[tenn-gsx]

Could it be the load scale being off? Since thats off I probably have my sd idle tables lower than they should be which will add timing wont it?

 

[bsbllfit7]

wouldnt add timing it would pull/add fuel if anything. The SD cells are basically showing the engine how much air is coming in at a certain point. Adjusting that number down will decrease the amount of air the engine sees and pull fuel. Increasing fill increase the amount of air the engine thinks it sees and add fuel. Thats how we start to calibrate the system is by adjusting those cells so that afratioest and actual air fuel ratio match up as well as your map sensor and boostest.

the only things that affect timing are base timing and your DA timing tables

 

[tenn-gsx]

And the da timing tables use airflow calculations as well. This much I know. That is why using an afc causes your timing to advance. When you scale down the airflow reading to dial in injectors the unfortunate( or fortunate if its what you want) side effect is that your timing advances beyond what you would expect to see.

Im pretty sure that once I get the load scaling fixed and the sd cells re adjusted that the timing will come down one or 2 degrees.

 

[bsbllfit7]

haha only one way to find out! Change the load scale and report back with a new log!

 

[tenn-gsx]

I do want to say thanks for the help. You guys found some things already that I was sorely missing the gist of. Hopefully my idle recovery works out better tomorrow after I implement these changes.

Im going to ask again. Why would my tps reading increase by .04v and 1% when the car is running?

 

[bsbllfit7]

.04 with it running or with it not running? Either way you need to adjust your tps so that the voltage at idle is .63v. That will give you the low idle for sure. I know this because i just replaced my tps. After you have it at .63v then with the car off and a log running go from 0% throttle to foot to the floor. Once that is done click anywhere on the graph and do tpsadjust. It will make the necessary changes to the throttle position sensor for your engine! Hope that helps

 

[tenn-gsx]

I know the method. The tps shows .63v and 0% when key on not running. Then .67v and 1% anytime it is running. Tpadjust does not fix this. Unless I start lower than .63v.

 

[bsbllfit7]

i would loosen the tps screws and get it right at .63 at idle and just manipulate the tpsadjust settings tell it goes down to 0%, or just do the tpsadjust process with the engine running and see what happens

 

[tenn-gsx]

So then not running the readings can be lower with no issue. Cool thanks.

 

[phunny]

Looks like we have close to the same setup minus the turbo. If you had version 3 I could give you my tune and it would probably get you to a closer start. Let me know if you want to try it. Do you run speed density?