mods that make a difference: 8.5:1 compression, bc stage 3 cams, CNC port head, 50 trim, 900CC injectors. AEM 3.5bar, GM IAT sensor, return line on boost/vac source base pressure 43PSI.
O2 feedback sucks ass. It takes forever to get to its target. No matter what gets changed (its 100000000000 times better than the wizard right now...but no where near perfect)
Hot start problem that i've complained about since i've owned the EMS....let it sit for 10-20 min after driving around and then restart it, it runs lean (18-19:1 afr's for 10sec-2min) then settles itself out.
Warm-up enrichment afr's are different EVERY TIME. This confuses me. It could be the same temp outside, same IAT's, same everything and it'll be at 12:1 once and 14:1 the next.
Slowing to a stop, as soon as you're out of decel fuel cut, it runs 12:1 until you reach a complete stop....then it idles normal again. (even though it sits in the same cells as the idle)
it has a 13.5:1 idle without O2 feedback on, runs 14.5:1 to 15.0:1 through out the RPM and vacuum range till approx 5inhg then it runs 13.5 and progressivly richer up to an 11.2-11.5 under boost without O2 feedback on.
What makes you think thats too much fuel at low RPM's?
mods that make a difference: 8.5:1 compression, bc stage 3 cams, CNC port head, 50 trim, 900CC injectors. AEM 3.5bar, GM IAT sensor, return line on boost/vac source base pressure 43PSI.
nice mod list
O2 feedback sucks ass. It takes forever to get to its target. No matter what gets changed (its 100000000000 times better than the wizard right now...but no where near perfect)
yea you took out most of the gain on the o2 fb
Hot start problem that i've complained about since i've owned the EMS....let it sit for 10-20 min after driving around and then restart it, it runs lean (18-19:1 afr's for 10sec-2min) then settles itself out.
may be your o2 FB is delayed big time in the cold and you need enrichment we need a cold start logw/ the start screen parameters
Warm-up enrichment afr's are different EVERY TIME. This confuses me. It could be the same temp outside, same IAT's, same everything and it'll be at 12:1 once and 14:1 the next.
its based on the coolant temp
Slowing to a stop, as soon as you're out of decel fuel cut, it runs 12:1 until you reach a complete stop....then it idles normal again. (even though it sits in the same cells as the idle)
i would need to know what your lowest load is in psig and may again be tied to the o2 FB
might think of more later.
the map looks nice (100% boost comp) i think your idle % map needs to be finished, and your idle fuel and ign. FB needs to be toned down. and you dont like much timing above 15 psi do ya (I assume its a pretty big turbo)
i would lower your RAW values (mb/sec) to allow some head room
please post some logs with the aproprite parameters (you will need to .zip em)
all and all looks like a good start, and if its working like you say should just need some minor touches
ok, lets start by selecting the aproprite O2 sensor in your sensor setup, then set the sensor gain, make the sensor and gauge read the same if its a eugo box dont wory about that last step. then go to the fuel<o2 feedback<o2 sensor wizard and select the correct sensor again (copy your FB map first so you can paste it back up). your FB cuts out at .91 psi so you have no load control, if it was me i would make a back up copy of this map (just incase) then set all the original settings from the 1510 base map in the O2 FB area and start tuning your FB again O2 feed back
The reason there is no o2 sensor configured is because i changed all the settings. I'm running an Innovate wideband and the numbers are way way out when you compare the actual AFR to what the AEM sees. After dealing with AEM a bunch on this I was able to go in with the laptop and change the settings of both the LC-1 and the AEM so now they read the same. Because I changed the afr/volt table it unchecks the O2 sensor I have.
The base settings are way of. It ossilates way to much before it reaches the target O2. I've been playing with it but i really dont know what im doing when it comes to that.
Im still working on the boost fuel table so I turned O2 feedback off under boost.
I dont know whats going on with the idle very much. Tried a million things but still working on it. I only recently figured out how to get it to run off the maps. (TPS voltage thing)
I recently got rid of my AVC-r and am now using the EMS to control boost, so i'm tuning as I go. I havnt gone over 16PSI with the new tune (ran 24 before, but not full boost comp) So still working on the fuel/timing for anything over that.
The reason there is no o2 sensor configured is because i changed all the settings. I'm running an Innovate wideband and the numbers are way way out when you compare the actual AFR to what the AEM sees. After dealing with AEM a bunch on this I was able to go in with the laptop and change the settings of both the LC-1 and the AEM so now they read the same. Because I changed the afr/volt table it unchecks the O2 sensor I have.
The base settings are way of. It ossilates way to much before it reaches the target O2. I've been playing with it but i really dont know what im doing when it comes to that.
Im still working on the boost fuel table so I turned O2 feedback off under boost.
I dont know whats going on with the idle very much. Tried a million things but still working on it. I only recently figured out how to get it to run off the maps. (TPS voltage thing)
I recently got rid of my AVC-r and am now using the EMS to control boost, so i'm tuning as I go. I havnt gone over 16PSI with the new tune (ran 24 before, but not full boost comp) So still working on the fuel/timing for anything over that.
if I was you I would set up that sensor and use the sensor gain to match it up. once its set up correctly I think you will be plesently suprised
One thing regarding your hot start issue. You may want to check out how quickly your wideband is sending a true AFR signal to the EMS for it to make corrections off of.
I know on my Zeitronix unit, it takes about 26 seconds to warm up (regardless of temps) before it starts sending a true AFR signal to the EMS. During the time that the sensor is warming up, it sends a false signal to the EMS that, in my case, would usually read rich in the EMS, and as such, the EMS would try to compensate for it with O2 feedback. This would cause the car to run horrible on hot starts.
To fix this, I set a static value of 26 seconds in the "Start Extra Decay Table", so that the EMS doesn't make any corrections off of the signal from the wideband until it is actually reading and sending a correct afr value.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Can someone critique my tune?
(I assume its a pretty big turbo)
Linear Mode
