Spartan 3 ADV AFR flat spots
#1
Spartan 3 ADV AFR flat spots
I am unable to update the subject of this post. I think it may be a little misleading. It should read: Spartan 3 w/LSU ADV AFR flat spots. I forgot that 14point7 has a legacy product named Spartan 3 ADV.
I have a Rev built Mini MS3 running 1.5.1 integrated with a Spartan 3 w/a LSU ADV sensor (FW:1.08) via CAN.
I am seeing flat spots in my AFR at closed loop idle with a Spartan 3 (FW:1.08) set to perf0. Even though the PW increases or decreases the AFR remains more or less flat. If I change to perf1(10ms response time) the AFR has more noise, but then the AFR follows the PW.
Anyone else seeing this behavior with their Spartan 3
I have a Rev built Mini MS3 running 1.5.1 integrated with a Spartan 3 w/a LSU ADV sensor (FW:1.08) via CAN.
I am seeing flat spots in my AFR at closed loop idle with a Spartan 3 (FW:1.08) set to perf0. Even though the PW increases or decreases the AFR remains more or less flat. If I change to perf1(10ms response time) the AFR has more noise, but then the AFR follows the PW.
Anyone else seeing this behavior with their Spartan 3
Last edited by elp; 02-14-2024 at 11:29 AM. Reason: Subject line update
#2
Not exactly sure what you are looking for, but I have two widebands currently, since adding a Spartan3. The other is a analog needle gauge Glowshift wideband.
I left them both wired for the season to see how they differed.
AFR = Glowshift wired into 02 in on a MSPNPPRO
AFR2 = Spartan3 on CANEGO
The spartan is a 'smoother' looking signal. It is set up using their instruction and I'm not sure of FW, this is as received last spring (2023) or fall of 2022.
Images:
1st is under wastegate pressure boost.
2nd is after a track session idling, just before shutdown.
I left them both wired for the season to see how they differed.
AFR = Glowshift wired into 02 in on a MSPNPPRO
AFR2 = Spartan3 on CANEGO
The spartan is a 'smoother' looking signal. It is set up using their instruction and I'm not sure of FW, this is as received last spring (2023) or fall of 2022.
Images:
1st is under wastegate pressure boost.
2nd is after a track session idling, just before shutdown.
#3
Thanks natewin.
Can you look at your PW at idle? I wondering if this was introduced with in a later firmware iterations. A similar issue was reported back with 1.05 beta. https://14point7.discoursehosting.ne...-05-beta/179/6
In my screenshot @219.196 , the PW is increasing but the AFR does not move at all, and right after that the PW decreases, again no change in AFR. The AFR holds flat @ 14.5 for about 6 seconds.
I am adding an updated graph with PW, AFR and EGO correction plotted together with better colors.
Can you look at your PW at idle? I wondering if this was introduced with in a later firmware iterations. A similar issue was reported back with 1.05 beta. https://14point7.discoursehosting.ne...-05-beta/179/6
In my screenshot @219.196 , the PW is increasing but the AFR does not move at all, and right after that the PW decreases, again no change in AFR. The AFR holds flat @ 14.5 for about 6 seconds.
I am adding an updated graph with PW, AFR and EGO correction plotted together with better colors.
#6
Just a little more info about my setup.
Purchased: Spartan 3 - Spartan 3 with LSU ADV
Unless I moved something: I think the sensor is further downstream than the old glowshift LSU 4.9 sensor which is in the downpipe about 1ft from the turbo outlet, similar to stock O2 location. I think the LSU ADV is just before a high flow cat.
Purchased: Spartan 3 - Spartan 3 with LSU ADV
Unless I moved something: I think the sensor is further downstream than the old glowshift LSU 4.9 sensor which is in the downpipe about 1ft from the turbo outlet, similar to stock O2 location. I think the LSU ADV is just before a high flow cat.
#7
Same, the controller and sensor came directly from 14point7. I purchased it in Dec 2023. It was shipped with FW 1.08. I just down graded the FW to 1.04. Which is probably the version you are running.
I am still seeing the flat spots, but they are not as long as in my post above. They were reduced to 2-3 sec from 5-7 sec Still not right. Not sure what that tells me, but it is another data point.
Regarding the installation location, just before the cat in my FM downpipe.
I am still seeing the flat spots, but they are not as long as in my post above. They were reduced to 2-3 sec from 5-7 sec Still not right. Not sure what that tells me, but it is another data point.
Regarding the installation location, just before the cat in my FM downpipe.
#17
Yes, I did. Alan and I exchanged emails for about two weeks. He thought my logs looked fine. All of which had similar flat spots between 14-15, like the one above. Below and above the 14-15 range it looked good. I even referred him to a post on the 14point7 support site (link above). Where another customer reported a similar issue. Honestly, I gave up because he seem convinced that it was fine.
Did I take the easy road out, probably.
Did I take the easy road out, probably.
#19
I wonder if the new 1.6 firmware would have helped at all?
The FW 1.6 announcement states "Add built-in support for Spartan3 CAN wideband."
https://www.msextra.com/forums/viewtopic.php?t=79196
The FW 1.6 announcement states "Add built-in support for Spartan3 CAN wideband."
https://www.msextra.com/forums/viewtopic.php?t=79196