Search found 39 matches

by gurov
Fri Sep 06, 2024 5:58 pm
Forum: Dev: Hardware
Topic: rusEFI in Arduino Mega2560 form-factor - megaefi - speeduino / rusefi mashup
Replies: 5
Views: 6387

Re: rusEFI in Arduino Mega2560 form-factor - megaefi - speeduino / rusefi mashup

heard on the TC2030 / 10 pin SWD. i'll get that into the next iteration, as well as silk enlarge. the buttons are largely useless in how this is meant to be installed, as it goes MCU down to the vehicle shield, exposing the backside without any pcba this batch of blue has RST and BOOT buttons mislab...
by gurov
Fri Sep 06, 2024 4:48 pm
Forum: Dev: Hardware
Topic: rusEFI in Arduino Mega2560 form-factor - megaefi - speeduino / rusefi mashup
Replies: 5
Views: 6387

Re: rusEFI in Arduino Mega2560 form-factor - megaefi - speeduino / rusefi mashup

Awesome, i'll start using that instead of 407-discovery

This is MEGA100:
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by gurov
Tue Jun 25, 2024 6:39 pm
Forum: You and your build
Topic: 1994 supra with uaEFI
Replies: 24
Views: 51814

Re: 1994 supra with uaEFI

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by gurov
Tue Jun 25, 2024 5:31 pm
Forum: You and your build
Topic: Toyota Supra 2jz-gte non-vvti plug and play uaefi
Replies: 0
Views: 4522

Toyota Supra 2jz-gte non-vvti plug and play uaefi

it's a carrier board uaefi for the 120 pin non-vvti 2jz found on sc300, aristo, supra

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by gurov
Thu May 02, 2024 4:34 pm
Forum: Dev: Hardware
Topic: rusEFI in Arduino Mega2560 form-factor - megaefi - speeduino / rusefi mashup
Replies: 5
Views: 6387

rusEFI in Arduino Mega2560 form-factor - megaefi - speeduino / rusefi mashup

First off, huge thanks to pazi88 for designing this board and letting it out into the wild - stm32f407vEt in an arduino Mega2560 form factor: https://github.com/pazi88/STM32_mega However, stm32f407vEt won't do for our purposes. so replacing that with a VGT version, we get this: megaEFI: https://i.im...
by gurov
Fri Apr 12, 2024 12:31 am
Forum: Dev: Hardware
Topic: Fix for UAEFI sometimes not starting without USB connecteed
Replies: 2
Views: 5280

Re: Fix for UAEFI sometimes not starting without USB connecteed

correct, still don't know the actual root cause, just breadcrumbs of symptoms with comparison to good board
by gurov
Fri Apr 12, 2024 12:24 am
Forum: User Support
Topic: UAEFI vs 407disco (actual) startup times difference - SOLVED
Replies: 9
Views: 6756

Re: UAEFI vs 407disco (actual) startup times difference

the startup time difference is solved by soldering sb10 on disco board bottom:

https://rusefi.com/forum/viewtopic.php?f=4&t=2747
by gurov
Thu Apr 11, 2024 10:30 pm
Forum: Dev: Hardware
Topic: Fix for UAEFI sometimes not starting without USB connecteed
Replies: 2
Views: 5280

Fix for UAEFI sometimes not starting without USB connecteed

image.png from discussion on discord: 5vp does not light up with just 12v below a certain battery voltage, causing a no-start condition this was traced down to a severe enough drop at the main 5v regulator that would cause the main MCU to power down, aborting enabling 5vp, entering a loop. fix is r...
by gurov
Thu Apr 11, 2024 5:42 pm
Forum: Dev: Hardware
Topic: stm32F407 Discovery Board taking 2+ seconds to boot - SOLVED
Replies: 0
Views: 5782

stm32F407 Discovery Board taking 2+ seconds to boot - SOLVED

Howdy all. I have a DIY rusefi ECU based on 407-Discovery board, and I noticed it was taking 2+ seconds to boot up before it started to try to sync/perform engine management actions. after looking around, the solution is to solder SB10 solder bridge at the bottom of the board in the st-link area. no...
by gurov
Fri Apr 05, 2024 7:08 pm
Forum: Dev: Hardware
Topic: uaEFI Ultra Affordable EFI
Replies: 20
Views: 64917

Re: uaEFI Ultra Affordable EFI

more mounting suggestions:

carrier board in a stock ECU case
image.png
image.png (2.27 MiB) Viewed 39960 times
able to close the cover:
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image.png (1.04 MiB) Viewed 39960 times

pins into UAEFI molex connectors at almost straight angles:

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image.png (656.42 KiB) Viewed 39960 times

for molex spacing, 3 pin connectors with middle pin removed:

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image.png (60.22 KiB) Viewed 39960 times
by gurov
Tue Mar 12, 2024 4:08 pm
Forum: User Support
Topic: UAEFI vs 407disco (actual) startup times difference - SOLVED
Replies: 9
Views: 6756

Re: UAEFI vs 407disco (actual) startup times difference

it's not, that's just a way to generate a +5v signal for coils using this kind of driver and using "inverted" ignition setting. that part works fine, and it works fine once it's initialized. this is how old megasquirt1/2 would set up smart coil ignition from the front LED that were driven ...
by gurov
Tue Mar 12, 2024 3:51 pm
Forum: User Support
Topic: UAEFI vs 407disco (actual) startup times difference - SOLVED
Replies: 9
Views: 6756

Re: UAEFI vs 407disco (actual) startup times difference

i'm using a low-side driver to drive the coils, uln2803a IC to pull down 5v low. ignition is in "inverted" mode in ignition setup. so the startup time impacts that portion of the init sequence in this video: https://www.youtube.com/watch?v=-EUrvMpdcLA the LED array on the left is ignition ...
by gurov
Tue Mar 12, 2024 3:06 pm
Forum: User Support
Topic: UAEFI vs 407disco (actual) startup times difference - SOLVED
Replies: 9
Views: 6756

Re: UAEFI vs 407disco (actual) startup times difference

hmm, perhaps once i get better gate drivers for the ignition setup on there that doesn't need to start inverted.

the pinout isn't quite the same between these two setups, so maybe disco firmware on uaefi could work if i set just a basic proof of life sign up.
by gurov
Tue Mar 12, 2024 2:49 pm
Forum: User Support
Topic: UAEFI vs 407disco (actual) startup times difference - SOLVED
Replies: 9
Views: 6756

UAEFI vs 407disco (actual) startup times difference - SOLVED

kind of comparing apple to rotten potatoes here, but would be neat to have a reason for why delay after 12v is applied is different on UAEFI compared to basically same 407 disco setup: UAEFI startup sequence, 4 super bright LEDS are stepper motor coils https://rusefi.com/online/view.php?msq=1623 htt...
by gurov
Wed Mar 06, 2024 5:23 pm
Forum: You and your build
Topic: Arctic Cat C-TEC2 8000 Engine
Replies: 15
Views: 25446

Re: Arctic Cat C-TEC2 8000 Engine

oil pump must not care then which way it's spinning., or it's splash-lubricated.
by gurov
Mon Mar 04, 2024 5:07 am
Forum: User Support
Topic: Sack of ECUs with locked timing on 2jz-gte
Replies: 7
Views: 5798

Re: Sack of ECUs with locked timing on 2jz-gte

hmmm, yes, falling edge cyl1 into cam signal with VVT tracking, interesting. i'll get the other patch harness ready i guess and test this on the bench
by gurov
Mon Mar 04, 2024 5:03 am
Forum: User Support
Topic: Sack of ECUs with locked timing on 2jz-gte
Replies: 7
Views: 5798

Re: Sack of ECUs with locked timing on 2jz-gte

@AndreyB - perhaps the part of the code that tracks the current VVT offset could be used with a magnetic pickup on cyl1 to attempt to capture the drift of a particular ECU at a certain RPM, using an extra patch harness.
by gurov
Sat Mar 02, 2024 5:01 am
Forum: User Support
Topic: Sack of ECUs with locked timing on 2jz-gte
Replies: 7
Views: 5798

Re: Sack of ECUs with locked timing on 2jz-gte

would be pretty trivial to do for me, another patch through harness between the ecu and engine with sniffer device

maybe we can connect timing light's inductive pickup to VR input to capture what the timing light sees ?
by gurov
Sat Mar 02, 2024 4:46 am
Forum: User Support
Topic: Sack of ECUs with locked timing on 2jz-gte
Replies: 7
Views: 5798

Re: Sack of ECUs with locked timing on 2jz-gte

also, taking this a bit further, since that just basically becomes and automotive signal sniffer/analyzer. you could use this to force an OEM ECU to give up its secrets. take in cyl1 for timing (or all of them, why not) - timing map take in inj1 for timing AND pulse width (of all of them, why not) -...
by gurov
Sat Mar 02, 2024 4:25 am
Forum: User Support
Topic: Sack of ECUs with locked timing on 2jz-gte
Replies: 7
Views: 5798

Re: Sack of ECUs with locked timing on 2jz-gte

can’t measure it - can’t fix it. i’ll try taking a video with a different camera (d800) and lens to make it a bit clearer, something i can control aperture on. maybe we can rig up an f407 disco, or a secondary uaefi to be a watchdog, where hall3 input is cyl1 ignition. perhaps with knowing the advan...
by gurov
Sat Mar 02, 2024 3:41 am
Forum: User Support
Topic: Sack of ECUs with locked timing on 2jz-gte
Replies: 7
Views: 5798

Sack of ECUs with locked timing on 2jz-gte

image.png image.png the setup is the same, ignition advance locked at 15 degrees. iphone on a tripod, pointed at the intake cam sprocket. actual advance values don't matter much, we're looking for how much timing jumps around when engine accelerates/decelerates from bottom left, clockwise: MS3PRO P...
by gurov
Fri Feb 23, 2024 9:24 pm
Forum: You and your build
Topic: 1994 supra with uaEFI
Replies: 24
Views: 51814

Re: 1994 supra with uaEFI

RPM updates once per engine cycle, unless the option "always use instant RPM" is selected in the experimental settings. I've endurance raced on that setting so it's probably fine to use. MAP updates once per cylinder, since it averages pressure over an angle window (configurable with the ...
by gurov
Fri Feb 23, 2024 9:06 pm
Forum: You and your build
Topic: 1994 supra with uaEFI
Replies: 24
Views: 51814

Re: 1994 supra with uaEFI

awesome ! thank you !
by gurov
Fri Feb 23, 2024 8:56 pm
Forum: You and your build
Topic: 1994 supra with uaEFI
Replies: 24
Views: 51814

Re: 1994 supra with uaEFI

hmmm, so RPM, MAP, AFR, BATV, PW, IGNTIMING here's what happens when there's a stairstep like that, more vague images coming: this CHUNK of data; don't worry what the actual values are, shape is more important: image.png in MLV, that produces a MAP TRAIL, that is overlayed on the VE map: image.png t...
by gurov
Fri Feb 23, 2024 8:40 pm
Forum: You and your build
Topic: 1994 supra with uaEFI
Replies: 24
Views: 51814

Re: 1994 supra with uaEFI

from the logs, i'm seeing RPM "stairstep" 50ms between updates, TPS is much smoother, MAP is 10ms between updates.

WHITE line is RPM
RED is MAP
GREEN is TPS

log resolution seems to be around 5ms, which is how often the green line seems to be changing.
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is that expected ?
by gurov
Fri Feb 23, 2024 4:33 pm
Forum: You and your build
Topic: 1994 supra with uaEFI
Replies: 24
Views: 51814

Re: 1994 supra with uaEFI

It's alive and runs and idles: like 2nd or 3rd startup: headphone warning on all of these. https://youtu.be/ySHCzs3spFg https://youtu.be/id7PRcgcvQA idle short https://youtube.com/shorts/Xxg6QUtrjys rev and back to idle from the engine bay: https://youtu.be/3oy5nil6sjY tune is here: https://rusefi.c...
by gurov
Thu Feb 22, 2024 9:17 pm
Forum: You and your build
Topic: 1994 supra with uaEFI
Replies: 24
Views: 51814

Re: 1994 supra with uaEFI

IMG_4277.jpeg
IMG_4277.jpeg (237.57 KiB) Viewed 51179 times
add e9-28 as a ground. seems to be a dedicated ground for the maf that’s not listed in any of the lists
by gurov
Thu Feb 22, 2024 6:11 pm
Forum: You and your build
Topic: 1994 supra with uaEFI
Replies: 24
Views: 51814

Re: 1994 supra with uaEFI

position sensor grounds are all tied together. so type should be same for all 3 grounds. image.png for stepper valve, indicate which coil is which: 32 + 34 = IAC_coil1 33 + 35 = IAC_coil2 image.png 47 + 48 are oxygen sensors, they are def used not totally sure which one is which on the harness. imag...
by gurov
Thu Feb 22, 2024 1:10 am
Forum: Misc
Topic: Useful MegaLogViewer videos along with some cool theory knowledge
Replies: 0
Views: 6786

Useful MegaLogViewer videos along with some cool theory knowledge

I found this channel with some fairly old videos that are packed with a whole lot of knowledge on MegaLogViewer usage and tuning (mostly megasquirt) EFI systems: Using historgram and table generator: https://www.youtube.com/watch?v=N7zqmWfblxg&t=1s This one helped me lots to fix my hunting idle:...
by gurov
Mon Feb 19, 2024 1:58 am
Forum: You and your build
Topic: 1994 supra with uaEFI
Replies: 24
Views: 51814

Re: 1994 supra with uaEFI

the only reason i even brought up 1uz-fe engines is cause for a few years, probably while partsbin was real hot, there was a shared ECU, probably before VVTI was bolted onto the V8s. the connector is really the main thing i was after even looking at the V8. i don't think there's very many desireable...