ECMlink Adjusting global and dead time settings with DSMLink

[lazyazzdaddy]

Alright I have been searching for a few days to find out how to properly adjust global and dead time settings in DSMLink. I recently upgraded from PTE 680 to PTE 880cc injectors when I installed my new turbo "holset hx35".

I know from reading that my globals should be set at aprox 45% and my dead time at 420 with my fuel press set at 43.5. Now my problem is that I am reading my LTFT low and mid and both are right at 15.5. I understand the they want you to adjust the globals to try to get them to as close as 0 as possible. I have tried changing the global setting and nothing seems to change.

Now my question is first, which way do I want to take the global to try to fix this, do I want a higher # or lower#? Also as far as dead time goes I'm a little confused as well as to what I want to do there.

As of now I have it set to 48% global and 405 dead time and it seems to be better than the suggested values of 45% and 420 dead time but it's still giving me some issues like when idling I can definitely hear it "pop" intermittently. I would imagine this is due to running rich but I'm not sure how to fix it.

Also when driving "normal speeds" not WOT it hesitates pretty good when I'm taking off from a dead stop until I get up around 3500rpms or so.

If anyone could please give me some insight it would really help. When I bought the car it already had the 680's in it and was set up for them so I never had to do this aspect of it before. thanks in advance
Rick

 

[snowborder714]

Have you done your idle and rev tuning? This will change your LTFT Low and Mid once the ECU learns the new airflow settings.
http://www.jeffgst.com/gmafcalibration2.html

I had a similar problem in that my AirFlowPerRev was high (it was about .32 and should be .28 at idle). I posted on the link forums and Dave said to increase deadtime by almost 100 and to lower the 50Hz airflow slider (as they work as opposites - when one goes up, the other goes down). So I'm running 1150cc injectors with a deadtime of 480, whereas the DSMlink wiki says the deadtime should be 330. So I'd say to do your tuning first and then try messing with the deadtime. I haven't messed with the global yet so I'm not sure how it'll react.

 

[1992awdlaser]

Post a log.

 

[lazyazzdaddy]

Have you done your idle and rev tuning? This will change your LTFT Low and Mid once the ECU learns the new airflow settings.
http://www.jeffgst.com/gmafcalibration2.html

I had a similar problem in that my AirFlowPerRev was high (it was about .32 and should be .28 at idle). I posted on the link forums and Dave said to increase deadtime by almost 100 and to lower the 50Hz airflow slider (as they work as opposites - when one goes up, the other goes down). So I'm running 1150cc injectors with a deadtime of 480, whereas the DSMlink wiki says the deadtime should be 330. So I'd say to do your tuning first and then try messing with the deadtime. I haven't messed with the global yet so I'm not sure how it'll react.

I was actually reading that post a little while ago.. my only problem is that i dont have a gmaf Im still running the 2g mas. as far as wot tune i have it pretty good with 11.1 almost dead on across the board. I just for the life of me can not seem to get these injectors dialed in right.

Post a log.

I'll do that! anything specific you would like me to log?

 

[turbosax2]

Ltft lo, ltft mid, stft, mafraw, wideband, throtpos, timing, boostest.

 

[1992awdlaser]

I'll do that! anything specific you would like me to log?

Everything that turbosax mentioned plus g/rev, coolant temp, and tps volts.

 

[lazyazzdaddy]

ok just ran to the store and did a quick log.i did'nt log every thing you guys had asked for because i left befor i got your reply.. but i can always do another. I'll try to post this log hopefullyit will work.

 

[turbosax2]

Click on Display > Values and in the list on the right go through and adjust the Props. You should change the props for boostest (altitude), hp (if you have aftermarket wheels/tires), and a/f ratio (880cc injectors). Log MAFRaw instead of MAF. Your coolant temps are pretty high, work on getting them lower.

 

[1992awdlaser]

For the tps volts just turn your key on but don't start the engine. Open dsmlink and make sure the tps volts read .63 volts. If not, adjust the tps sensor.

First two things I noticed is intake and coolant temps are high and need to come down. As it sits right now your ecu is pulling 1 degree of timig for the coolant temp and 1 degree for the intake temp.

I would adjust the global some to see if the fuel trims get closer to zero. They are maxed out right now. I think you would lower the global but I'm not positive since I didn't have to do this.

Am I the only one that can't open the airflow adjustment section and a few others?

 

[turbosax2]

I can't open the airflow and other sections either.

 

[1992awdlaser]

Also, is your fuel pressure at 43.5? Do you have an adjustable regulator?

 

[lazyazzdaddy]

Also, is your fuel pressure at 43.5? Do you have an adjustable regulator?

yes i do have a afpr

 

[turbosax2]

You forgot to answer his first question. Is the afpr properly set at 43.5?

 

[lazyazzdaddy]

alright i try doing the tps check. as far as temps go i do realize there high but for one it is about 90 outside right now. I do have a new large "race" intercooler in the garage but i have'nt had the chance to install it yet... as far as my global and dead times go did anyone notice the dips in rpm between 1 and 3 grand ? after i do the tps test i'll pull another log and pst it with all the other info you guys wanted... thanks

You forgot to answer his first question. Is the afpr properly set at 43.5?

Sorry, yes it's set at 43.5 psi

anyone know why there is no value for tps showing up on my dsmlink/ i cant seem to find where it is so i can log it.. it's not listed in my values box

 

[1992awdlaser]

When you open Dsmlink hit F4. It should be on there.

 

[lazyazzdaddy]

alright i found it once i was hooked up to the car. anyways i was playing with my dead times and now it takes off a lot better.but i still cant seem to get my ltft's to budge even when adjusting my globals up and down both quite far. as far as my temps go they have been stuck at 210 sense i bought the car. even with the larger slim line fans i have. maybe it's just the thermostat? what do you guys think? i imagin if i were to go buy another i would get a 180 degree on correct? is it possable that i have a 210 degree t-stat? or do they not even make one?