2003 Toxic Tacoma

Post your project vehicles here! One thread per vehicle please.
User avatar
ToxicGumbo
LQFP144 - On Top Of The Game
Posts: 474
Joined: Tue Jan 03, 2012 8:37 pm
Location: Manhattan, KS. USA

Re: 2003 Toxic Tacoma

Post by ToxicGumbo »

em_knaps, I'm definitely going to look into the transmission mods and appreciate the info. Fred, thanks for the corrections and encouragement.

Today was a bit frustrating: running on little sleep, no MAP adjustments or testing, no timing tests. It was a struggle to get the (re)wiring in place for the 4 ignition outputs, mostly because the only wires I had available for delicate work were from Radio Shack's solid-core wire assortment. Short lengths were unforgiving, would become hot enough to melt their insulation, and cause bridging. The current arrangement is safe for testing, but is hideous and needs to be reworked in a cleanlier manner and with waste flux removed.


Image

The good news: Picked up some resistors and other goodies at Radio Shack, the 4 outputs tested properly, the jumpers for each pair are now in their default state of GND, and the wiring to the ECU socket is done. Fred sent me a third firmware file which I've loaded (his original "Listener" allowed me to primarily check for tooth count and sensors, the second to test RPM and perform additional sensor testing, and now this one to run). The rev limiter's been set to 6000rpm, 300rpm above stock.

Tomorrow: Timing with DeuceEFI and malcom2073, wire up injectors.

Reference:
-Jeff
User avatar
Fred
Moderator
Posts: 15433
Joined: Tue Jan 15, 2008 2:31 pm
Location: Home sweet home!
Contact:

Re: 2003 Toxic Tacoma

Post by Fred »

Great work, Jeff! :-)

Would suggest pouring some alcohol over it with a gentle brushing, and/or spraying it with pcb flux cleaner ASAP. viewtopic.php?f=9&t=1952

The latest firmware may well work, or work badly, but it's not completely configured for running. I did enough for you to test timing. More as you need it.

Don't forget "locate and modify HT lead" :-)

Fred.
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
User avatar
ToxicGumbo
LQFP144 - On Top Of The Game
Posts: 474
Joined: Tue Jan 03, 2012 8:37 pm
Location: Manhattan, KS. USA

Re: 2003 Toxic Tacoma

Post by ToxicGumbo »

With more oversight from the dev team and some key-turning help from my girlfriend, I was able to test out the ignition system.

Prior to doing so, Fred supplied me with another firmware file, this one with enough information to actually anticipate starting the engine. It only needs the proper decoder offset via EMStudio before I can hook up the fuel injectors and give it a go.

As a point of reference, I used a timing light to determine the timing degree set by the stock ECU. This required a jumper between the first ignition coil and its sparkplug so that the timing light could sense ignitor activity and match the firing pattern with a flash. Since this is a coil-on-plug setup, I bought a spark tester and individual sparkplug wire with a narrow and straight neck to fit down the COP channel.


Image


My first pass with the timing light revealed ~13-14 deg by matching a notch on the crank pulley with a scale affixed to the engine block (the flashing of the timing light makes the notch appear to stationary and will match a position on the scale). A second, longer, idle put it around 9-10 deg. I worked with DeuceEFI to peer into the firmware via EMStudio and it was determined that Fred's initial settings were appropriate for cranking with the A3.

Completely useless video showing timing light use on a 2RZ-FE

Cranking with a timing light meant it would flash much slower, making it much more difficult to spot the notch. My girlfriend got behind the wheel, turned the key, and with the light aimed towards the crank pulley, I simply couldn't see it. She had work and a sleeping kid to check on, so I borrowed a bottle of whiteout, filled the notch, and will have to resolve the offset calculation tomorrow with another cranking run.

Once this is resolved, I'll then wire up the injectors and we'll give the engine a go!

I may still need to resolve MAP issues and we won't be able to properly tune the ECU until I can add in a wideband O2 sensor and wire it up. Fred has also offered to build a final firmware file with all previous settings as default.


-Jeff
User avatar
Fred
Moderator
Posts: 15433
Joined: Tue Jan 15, 2008 2:31 pm
Location: Home sweet home!
Contact:

Re: 2003 Toxic Tacoma

Post by Fred »

Yep, I was right, your assistant never came back. This(that) is America, boy! :-) Random people are super happy to help, usually.... even when you don't need it. Surely you could have scrounged a stranger? :-)

Good progress, I see timing sorted tomorrow :-) Running following shortly after, disappointment in MAP readings shortly after again :-)

BTW, I told you in IRC, but you seem to have forgotten: Once you set your timing change (only AFTER you've set it) the 200RPM column to zeros with ramp up to 10, it'll crank nicer this way IMO. 10 won't hurt and might be better, but this is a conservative starting point.

Fred.
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
User avatar
ToxicGumbo
LQFP144 - On Top Of The Game
Posts: 474
Joined: Tue Jan 03, 2012 8:37 pm
Location: Manhattan, KS. USA

Re: 2003 Toxic Tacoma

Post by ToxicGumbo »

No, you've been very clear. I have that down in writing and almost posted it here along with others steps taken, but am not sure how much to make public while the project and methodology evolve (potentially throwing others off or misleading other builders as opposed to keeping them talking with their build sponsors). I hope to review this entire process and make a more general walkthrough in latex.

While editing a long list of directives and advice, I realized how often I've asked the same questions over and over (partly due to sleep deprivation). Thanks for the patience and determination at helping me seeing this through.


-Jeff
User avatar
Fred
Moderator
Posts: 15433
Joined: Tue Jan 15, 2008 2:31 pm
Location: Home sweet home!
Contact:

Re: 2003 Toxic Tacoma

Post by Fred »

ToxicGumbo wrote:I hope to review this entire process and make a more general walkthrough in latex.
I want video of you doing a walk-through in latex! :-o
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
User avatar
Fred
Moderator
Posts: 15433
Joined: Tue Jan 15, 2008 2:31 pm
Location: Home sweet home!
Contact:

Re: 2003 Toxic Tacoma

Post by Fred »

More success that Jeff was too tired and/or busy and/or disillusioned to post about! GO JEFF! And GO TEAM NZ too! :-)

In other news, this message brought to you speculatively in the hope that I'm wrong:

Image
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
User avatar
ToxicGumbo
LQFP144 - On Top Of The Game
Posts: 474
Joined: Tue Jan 03, 2012 8:37 pm
Location: Manhattan, KS. USA

Re: 2003 Toxic Tacoma

Post by ToxicGumbo »

Love the image choice.

Didn't datalog during the initial attempts, but am changing that. Without a dedicated helper for timing and having to run yards of extension cords to use my 3%-battery-life laptop, I went on a hunt for the trusty old EeePC and am currently installing Debian on it. That will make life substantially better, especially once tuning is underway.

Two nights ago, I found that with the ignition timing offset at 0 deg, the Tacoma's timing scale + light showed the crank pulley notch at about 30 deg before TDC. Yesterday, I tried again with other values and had some difficulty. The COP jumper has a lamp which showed spark and the timing light has a "trigger depressed" indicator which showed proper operation there, but the actual strobe was somewhat unresponsive and erratic. I later found that one of my ignition wires was somewhat pierced by an arched solder pad and may have been shorting. Got that cleaned up and grabbed a degree wheel--I'll draft up a rough layout of what happens for each of the following hex values as they're entered into the ECU and are tested, at least up to the point of narrowing down a good offset:

+30 0x05DC
-30 0x4074

+25 0x04E2
-25 0x416E

+20 0x03E8
-20 0x4268

+15 0x02EE
-15 0x4362

+10 0x01F4
-10 0x445C

+5 0x00FA
-5 0x4556

I also wired up the injectors on the Jaguar PCB for 1-4, 3-2, but won't lead that back to the ECU socket until ignition is sorted out. So things are getting closer, albeit slower than hoped for. The delay helped me find my packed GoPro Hero and its suction cup mount, practice using my camera's video function, locate the EeePC, and have a FreeEMS t-shirt on standby for the magic moment.

Edit: At the very moment, I'm working on partial case fitment. The wires have been really getting beaten around.
Edit: Added (+/-)5 values.

-Jeff
Last edited by ToxicGumbo on Fri Sep 20, 2013 8:51 pm, edited 1 time in total.
User avatar
Fred
Moderator
Posts: 15433
Joined: Tue Jan 15, 2008 2:31 pm
Location: Home sweet home!
Contact:

Re: 2003 Toxic Tacoma

Post by Fred »

Glad to find this here. Was a little sad to see no IRC posts at first.
ToxicGumbo wrote:Love the image choice.
Inspired by Gufi :-) "BOOST ALL [of] THE THINGS" he said. I still have no idea what he meant.
Didn't datalog during the initial attempts, but am changing that.
Crappy equipment aside, this proves that you were "doing it wrong". The plan is to have the laptop always plugged in, hex panel open, make adjustment, crank, repeat, in a tight loop. If you have it open, it's logging. If you don't have it open, you can't be adjusting anything, and all of your cranking is not doing much good :-) [yes, I know you had M$ ignition issues]
Yesterday, I tried again with other values and had some difficulty. The COP jumper has a lamp which showed spark and the timing light has a "trigger depressed" indicator which showed proper operation there, but the actual strobe was somewhat unresponsive and erratic.
Your ignition driving topology is slightly better than MS3-"pro", so it *must* be OK, right? LOL :-) It should run the engine, but I warned you that the timing light may not work well/at all. I've been where you are, and it's a pain. You just need a sharp eye and a single spark or two, though. Nail down what you're seeing as best you can, then add fuel and go from there.
I later found that one of my ignition wires was somewhat pierced by an arched solder pad and may have been shorting.
I hope this makes a difference, but I doubt it.
I also wired up the injectors on the Jaguar PCB for 1-4, 3-2, but won't lead that back to the ECU socket until ignition is sorted out.
Like I told you, do hook them up, just disable it in software. Change that second to last byte from 8 to 4 temporarily and no fuel will flow.

Fred.
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
User avatar
ToxicGumbo
LQFP144 - On Top Of The Game
Posts: 474
Joined: Tue Jan 03, 2012 8:37 pm
Location: Manhattan, KS. USA

Re: 2003 Toxic Tacoma

Post by ToxicGumbo »

Fred wrote:Like I told you, do hook them up, just disable it in software. Change that second to last byte from 8 to 4 temporarily and no fuel will flow.
More specifically:
Fred wrote:then change the 8 to a 4
should get no fuel
if you do, it'll be obvious/loud
lol
The last three lines weren't entirely encouraging, you cheeky bastard. :lol:

I'll wire 'em up and make the change. Any wine preference for when all this is done?


-Jeff

Edit: added words of endearment.
Last edited by ToxicGumbo on Fri Sep 20, 2013 2:03 pm, edited 2 times in total.
Post Reply