MapECU3

There doesn’t seem to be a forum on here dedicated to the mapecu3 piggyback ecu being installed and tuned to the 2005+ 2TRFE 2.7L 4 cylinder Tacoma’s so what I’m looking to gather is any base maps, tuned maps, wiring diagrams, technical information and so on relating to the subject.

I am in the process of installing a mapecu3 in my 2006 2trfe and would appreciate any and all maps, schematics, tunes and all around tips on the subject. I will also be posting anything I can find from the mapecu forums as well. Thank you for you time guys.

 

Check the Performance & Tuning subforum. There is quite a bit of discussion spread throughout the Turbo BS thread (https://www.tacomaworld.com/threads/turbo-bs-thread.481844/). Search that thread for posts by myself, @yota243, and @05Taco4x4. We're all running the MAPECU3. @05Taco4x4 and I are both running it on the 2TR. I think there's at least one other user running it on a 2TR or 3RZ, but I forget who. Also, @Torspd used to run one on his 1GR and is a good resource in general.

There's also this thread (https://www.tacomaworld.com/threads/map-ecu3-question.371891/). It is more 1GR related, but has good general information.

Here's the pages from the FSM with ECU pinouts (https://www.customtacos.com/tech.ol.../06toyrm/06toypdf/06rmsrc/rm2006ta/006006.pdf).

This is a good thread to read on the MAPECU Forum. http://www.mapecu.co.nz/forum/showt...j-5th-(URD-supercharge-kit)(Tacoma-Hilux)4cyc

Did you try doing a Google search of the MAPECU forum? I find searching for 2TR gets me all the info that I'm looking for there. http://bfy.tw/LmWO

 

Did you purchase it through URD or somewhere else? URD supplies a pinout. With the 2006 model, there should also be a plug n play jumper harness available.

 

The base map that you run will depend on how you setup your MAP-ECU3. If you are running in MAF Intercept (most common) than your base map would start at all zero and adjust from there as you're adding/subtracting from the MAF signal to get the stock ECU to pump the correct amount of fuel. I have mine setup in MAF Elimination mode, so you ignore the stock MAF all together and build a full map of MAF values to feed the stock ECU to get the fueling that you want.

If you run MAF Elimination mode, the MAP-ECU3 has an auto-learn function to build a base map for you by splicing the MAP-ECU3 MAF input into the stock MAF sensor without the MAP-ECU3 MAF output hooked to anything. Once it has learned the base map, you cut the MAF wire and wire the MAP-ECU3 MAF output to the stock ECU MAF input, and you can tune from there. Pages 52-54 of the MAPECU3_V35X manual explain how to setup the MAF Elimination Auto Learn. Pages 65 and 66 show the wiring for MAF Elimination Auto Learn and after you've got the base map.

Did you buy the AFR Calibrator module to go with your MAF-ECU3? If not you'll need it to be able to tune while the stock ECU is still in closed loop.

 

I'm running a Haltech Elite 1500

 

My bad. For some reason I thought you were running the MAPECU. Were you considering before you decided on the Haltech?

 

Yes sir, you are correct.

 

I’m running the map ecu3. I was considering getting the afr calibrator but it definitely sounds like I need it now. I actually purchased my mapecu3 off of eBay used.
Thank you buyobuyo I really appreciate all the info. I think I also messaged you on the mapecu forum the other day too.

 

Buyobuyo I didn’t know there was a manual but I just got it! Snaps this is going to help so much. I’m really curious on what you have all your options set to on the mapecu3. I would kill to see a tbl of yours and some screenshots of the settings you have. I’m going to order the afr mod right now.

 

Yeah. You did message me over on the MAPECU forum.

I'll try to get some screenshots this weekend.

 

I'm still waiting on my AFR sensor to come in so at this point I'm monitoring MAP, spark advance, CL and open loop through my obd2 scanner.

The spark advance is around 25-30 at idle or under a small load and goes up to 7 maybe at high MAP and high RPMs, it will also go to 40-45 when I'm downshifting (5 speed manual transmission)

The MAP goes from 0.6-14 or so. Would that be considered vacuum because mt tool doesn't say - before the number.

Do these numbers sound right?

 

Tacomas don't have MAP sensors. They use MAF sensors. That 0.6-14 should be a mass per time measurement for a MAF reading. If you're monitoring tool is calculating a map value based on engine data, it's all vacuum, since naturally aspirated doesn't go positive. The units being in-Hg would make sense since PSI should be negative for vacuum.

 

That’s what I thought. I knew there was no way my intake manifold had any kind of positive pressure like that running in it.
What about those spark advance numbers? Do you remember what you ended up setting your table to?

 

I haven't messed with the timing table yet or monitored the timing with my Ultra Gauge.

 

What did you actually change then? Just fuel delivery?

 

buyobuyo- I was told by the mapecu forum to go ahead and use TPS for the y axis as it would be more reliable. thoughts?

also: when you had to cut the ignition signal wires to tie the mapecu in did you leave a way to quickly revert it back to stock?

 

Haven't heard of using TPS as the y-axis. Typically the internal MAP is used as the y-axis.

I used an URD jumper harness to wire in mine, so no stock wiring was affected. If I were to need to pull the MAPECU, I'd just unplug the jumper harness and plug the stock wiring back in.

 

This the jumper is $$$$ but worth it in case you need to limp home or go back to stock

 

I'm thinking about wiring up a set of plugs for all the wires that will be cut so I can just plug them back together in those situations. seems to be a lot cheaper than $260

 

So I got all the wiring done and installed a 8 pin plug so I can revert back to stock very easily and it works very well so that’s even better. I’ve got everything running smoothly and no fault codes popping up, the only thing is that I don’t have a a/f showing so I need to hook up the yellow wire on the 16 pin connector (o2 input) to I think E4 pin 25. Any experience with getting a/f or any numbers to go for?