ECMlink Evo 560cc speed density idle problems!

[onefast2gdsm]

I cannot for the life of me get my idle afr right. I switched to a 1g throttle body and put a 3" intake pipe on, and idle is 16.3:1. Before adding those parts the idle was around mid 15's.

Mods that matter
evo 560cc injectors
fuel pressure at 49 psi
rewired walboro 255hp
1g throttle body
speed density

my cruise is good. wot needs some work

 

[habitatguy187]

Newb question but do fuel trims not update when running sd?

 

[snowborder714]

Yes, they will update when running SD.

After the car is warmed up, adjust BISS slowly until you get ISCPosition to a stable 30.

Then watch this video and replicate on your car. You'll be adjusting applicable SD cells (can figure out which by turning on Track datalog) instead of MAF Comp sliders.

http://www.ecmtuning.com/demos/fueltrim.html

 

[onefast2gdsm]

I don't tune by using the sliders. I tried adding fuel via the ve table but the afr never changes no matter how much fuel I add

 

[snowborder714]

You use the VE table to get your AirflowPerRev in check and then use deadtime to adjust CombinedFT. Then your AFRatioEst and wideband should line up.

If not, post a log with the AirflowPerRev and CombinedFT in check and we'll see what's going on.


Edit: You also need to adjust your global % to use your current base fuel pressure and not the default 43.5 psi.

 

[1990whitetsiawd]

Why do you have the fuel pressure so high?

 

[snowborder714]

As he said in his thread on the link forums:

I bumped it up so I'd be able to get a little more boost out of the injectors I'm running.

 

[1990whitetsiawd]

There is no leaks as in exhaust or boost?

 

[MY1GDSM]

Im on my phone so I can't see the log but it's a good Idea to keep in mind from my experience Evo 560
depending on how long its been since they have been cleaned can flow quite a bit different then what they should...

 

[onefast2gdsm]

updated log. had a small exhaust leak at downpipe. afr is around 15.7 now, still not at 14.7 no matter what i do.

 

[snowborder714]

Does the wideband reading match the gauge?

Also, your front o2 doesn't cycle very cleanly. Are you sure that's in proper, working order?

 

[onefast2gdsm]

Does the wideband reading match the gauge?

Also, your front o2 doesn't cycle very cleanly. Are you sure that's in proper, working order?

wideband matches the reading. Front o2 has maybe 5k on it, its a bosch sensor.

 

[TexasTurbo]

Your deadtime is likely f'd as the peach colored evo 560's are actually 40usec faster than stock 450cc injectors.

If this isn't taken into account then it would be no surprise that there are issues.

 

[MY1GDSM]

Your deadtime is likely f'd as the peach colored evo 560's are actually 40usec faster than stock 450cc injectors.

If this isn't taken into account then it would be no surprise that there are issues.

If you look at the log you can see Deadtime has been adjusted. Also more deadtime then its' suppose to have would make it too rich not leaner...



Your a bit lower then I would run...

I also would be pulling more fuel then that as well if you really are at 49psi BFP As it wouldn't be as lean with more DT... This is assuming the Injectors have been cleaned recently or are flowing what they should be or around it... .