need2boost

iTrader: (24)

I just want a start up to make sure the aem ems is working. i have the map and and ait already. i have all my turbo, ignition stuff here as well, just installing one electronic pieces at a time, to cut down failing variables.

need2boost

iTrader: (24)

i was planning on installing the the ait bung and map when i install the ffim and intercooler piping, thus why i want to wait as well.

btw, for the vvti coils, i saw Ali used the MK3 coil harness, which part needs to be extended on that harness to make it work?

mitsuguy

iTrader: (2)

if you are just wanting to start it and run, just hook the AIT up and leave it loose somewhere, and the map sensor is easy enough - just a vacuum hose somewhere... air temp only changes fuel trims a couple percent and thats only with big swings in temperature, you could actually run it zeroed out just for testing...

just build a harness, its only 6 wires...

need2boost

iTrader: (24)

the reason why i wanted to use the premade harness was that I dont have the plugs yet, so I figure after buying new plugs, it would equal to or be more expensive.

leaving it hanging also crossed my mind, thus why I was wondering if it was required in the first place. i remember my rb25 with aem ems 2 enabled me to run maf at first, thats why I was wondering in this situation.

mitsuguy

iTrader: (2)

never tried it without it at least being wired...

the AEM will run off the maf, but its a whole different calibration file, so any work you do to make it start and run will be completely wasted when you change to map...

understand about the plugs... they can get pricey...

need2boost

iTrader: (24)

ok, i just thought the 1101 cal file came with maf, so was just tossing up the ideas right now. im just laying everything out before putting it under the knife a week or two later.

btw, the grounds for ignitor and map sensor, are you guys using a switched ground or body ground?

mitsuguy

iTrader: (2)

There is a maf cal file out there, but there are also map cals...

it is so much of a pain to change between the two, most people just start with the different base cal if they do change, negating any work done to make it start and run on the first map...

Ali SC3

iTrader: (10)

Nice work, sounds like its running well. I just dropped the vvti coils in there, no brackets or anything with all the wires running through there and the size of the coils they can hardly move.
You can build brackets off of the valve cover bolts, or just wedge them in the valley with something there is only like a 1/4" on each side of the coil it can move side to side.

If you are deleting egr it really does not matter where you put them, also there is hardly a difference on those injectors. I would mix them up evenly without 2 of the exact same next to each other, or match companion cylinders 1+6, 2+5, and 3+4.

Map and AIT is required on the 1101 file. Both Map and Maf use same 5V sensor wire from the ecu. There is some kind of wierd cal file that uses tps and rpm instead of load, and it is some 80's technology really should have never been done in the first place sort of thing. steer clear and run a map sensor and AIT. there is no reason why anyone should use an aem with the stock maf, even for testing or whatever purpose its not going to save you any time by being "easier". it will be much worse.

you do realize this is a factory gte ecu thread right.. lol

ait bung you can just leave hanging around in the bay temporarily, the aem doesn't use it that accurately anyways until you tune it. the map sensor just run a vac line to it, you don't have to professionally mount it, mine is mounted by the vacuum line thats attached to it.. lol
I made my own harness, but on the mk3 harness, if it attaches to your coils fine, extend the ignitor side. if it can't reach some of the coils, extend that side, but I think it should and you will most likely be doing the ignitor side.

^^ Exactly, it would be a pure waste of time, the aem works best with the map and IAT. There is even a warning on the 1101 instructions that you must install a map and iat. Our mafs are similar to 7mgte maf's but even they use map sensor and IAT on those.
you would be better off temporarily connecting your map sensor and IAT and using the stock cal.

lol where did you get switched ground from? the ground for the ignitor is a regular chassis ground. you can use a spot on the chassis that will give you a good ground, or even go a short distance to battery ground.
The map sensor has a ground wire already it is the ground wire for the maf plug as you can see on the wiring on page 1, this is a regular engine/chassis ground as well for all the sensors that I think ends up grounded on the intake manifold somewhere, but thats not important whats important is that you use the ground wire on the maf plug for the map sensor as shown. good luck.

eblick99

iTrader: (1)

does a '92 2JZ-GE have EGR? someone at the Lexus dealer told me no but im wondering otherwise. great thread btw, thanks for posting all the research. I have a set of 550s and US auto TT ECU/maf for my lexus sc300 na-t. sounds like i need to do the coil on plug conversion and get the map sensor.

will a set of vvti is300 coils/ignitor do the trick? i dont see why not. ide like to use newer parts and stay away from any mkIII conversion stuff. ive read through about 10 pages of this thread so far ill keep reading as i may find answers scattered throughout. aside from the map sensor and the c.o.p. conversion it doesnt sound like i need to do anything else. Do i have that right?

just leave the old distributor in place and make a cover for it? pull the cap and guts out anyways... or do i have to mess with that some...its my only point of confusion. if theres a good post # maybe point me there or ill just get to it as i read.

eblick99

iTrader: (1)

also is there an obd1 and 2 ecu? if so how do you tell... or does it not matter... i dont know if my tt auto ecu is 1 or 2. my car is obviously obd1 being a 92.

Ali SC3

iTrader: (10)

all non vvti USDM 2JZGE 's have egr, so yes a 92 2jzge from a US car would have egr.
is300 coils will do the trick, thats what I am running right now, in fact its written like a dozen times on the first page, and not 1 mk3 part listed on the first post

you leave the distirbutor in, you simply remove the rotor, thats it. so take off the cap, remove rotor, reinstall cap.
you can only tell by part numbers if its odb1 or odb2, or you would have to know the car and year range it came off of and I could tell you.

eblick99

iTrader: (1)

ya at some point people were talking about using older parts i dunno where, wsnt the first page. and i wasnt sure if vvti stuff would be compatible with an older ge motor. but thanks for the info! ill post an update when its done

F4A22

iTrader: (14)

Another car successfully running this mod.frankenstein 2j with 850's and map ecu.got it down to second 02 cel and runs great.thanks for the write up.

Ali SC3

iTrader: (10)

yeah, as an alternative to the vvti coils you can use other toyota wastespark coils, and most older toyota coils from the 90's have the same connector even.
Its just that clearly the 2jzge vvti coils are the best wastespark coils toyota makes, and they are made to fit our engine, so I recomend that to everyone its a very straight forward install especially if you have ever seen the stock setup on an IS300.

you can also use some from the mk3 supra, and the 4 cylinder camry's and all of these use plug leads for each cylinder, It wont look the cleanest but if you have the parts laying around it can be done.
there are coil on plug camry coils with an extra lead coming off for wastspark like the vvti ones, but these are the wrong length and not as big as the vvti coils or as good really.

you can use 1ZZ coils (which is becoming really popular on a lot of engines due to their good spark and reliability), and wire up all 6 as true coil on plug like the gte coils, these have built in ignitors and all you need to do is wire them normally except you tie all 6 IGF's from the coils to 1 wire going back to the ecu, cause the TT ignitor has 1 IGF wire normally. the IGT's go straight to each coil along with a power and ground. spooxexo is running this setup check out his build for more info, I would choose these over TT coils any day of the week.

Nice, that shouldn't be hard to fix now that you got it all worked out. how is the driving at lower speeds with the 850 map ecu setup? I have read good things. a vid or picture would be great.

ishootstuf

iTrader: (1)

... you can even use Ford modular V8/V10 coils, but it requires custom plug wires and a custom bracket. It's silly to do so unless you have a stack of them laying around and a harness for the connectors. The one nice benefit of them is that they are cheap. I think I once paid $110 for a new set of 8 when I was running a V8 in my truck.