4agze wiring and ECU

[keiichi]

Car - KE70

motor - 4AGZE

use - project, just bought it, not running

problem - wiring is a mess, did not come with ecu

occurs/started when - i bought it?

personal situation - my knowledge of wiring and ECU's is limited.

(will put pics up tomorrow if it helps)

ok so for some reason i bought a ke70 with a 4agze in it, not running, it has no ecu in it.

apparently it used to have an aftermarket ecu - brand name was something like ingen which had a hand controller.

the plugs are all intact and available, it used to run (drive) on the aftermarket ecu until it started to fall out of tune or something like that and got parked and left.

further information - runs off a normal distributer (as opposed to coil-packs) with (i think, at a guess) the CAS coming out of it. it appears to be basically stock except for an r33 intercooler, pod filter and extractors. pretty sure it is map sensored, not airflometered.

my question is - do i need to get an aftermarket ecu and have it re-tuned? or can i use a standard 4agze ecu?
orrrr..... wtf should i do next? what would be the best way to go about getting this running.

Thanks in advance ^_^

engine


where the coil/ignitor used to be.


only two ecu plugs


two plugs not connected. TPS on the left and on the right, is that a cold start injector?

[keiichi]

also how can i tell what version of 4agze i have?

[Sam-Q]

there would parts of it you could use with an OEM ECU but for the greater part you would need a very significant rewire


However fitting a different standalone ECU to the loom you have now is unlikely to need major work, you might need to make some basic changes after you swap the plugs but it shouldn't be too bad.

[keiichi]

ok so if the signals that are sent back to the ecu to form the map are factory then shouldn't a factory ECU be sufficient?

hmmmm and, why do you think i would need a rewire? do aftermarket ECU's come with their own loom?

it is possible that the ecu that used to be in there was just a piggy back on the OEM, the guy i bought it off didnt seem very sure about alot of it... he told me the previous owner had an aftermaket ecu - didnt specify what kind or type - with a hole cut in the glovebox for access to the ecu or something with a plug in it so you could plug in a controller and adjust shit. judging by the 4agze technology the only thing i could see being adjustable with the setup on this engine is maybe just the A/F ratio.
ignition timing is run off the distributer.
SC clutch engages when the computer tells it to, i dont see why the when would need to be changed.
A/F ratio shouldnt need to be changed just because of a pod filter.
So yeh, i just cant see why a standalone would be required in the first place. or even a piggy back, since the only thing adjustable would be A/F ratio which would be right from factory anyway.

Am I missing something here?

[Sam-Q]

well I am not exactly experienced as I have only been playing with 20V silvertop ECU's (aweful things!), and from that experience I have found that they have much more complex wiring paths and even though what your proposing sounds completely logic in practice it's likely to be very different.

[keiichi]

would it be wise to get a standard ecu with say for eg an hks f-con that comes with the replacement mass air sensor and take it somewhere to get tuned?

*edit* nvm that. just found out these are meant for turbo conversions.

[86TRD]

what colour is your dip stick? this can be a sign to what model motor it is, my 4agze is from a ae101 which has a grey dip stick, i think maybe ae92 or aw11 have a yellow dip stick.

[keiichi]

interesting - my dipstick is grey yeh.

[keiichi]

k - did a bit of research and inspected the car some more. it has a custom loom, will put some pics in the op in a min.
for eg. 4agze loom to ecu has connectors 16pin, 22pin and 26 pin. the ecu connectors on this loom are 16pin and 20pin. there are no wires or connectors to MAP and TP sensors. or i have looked at it wrong, TP and cold start isnt connected. there actually appears to be no MAP or AFM.

anyone know where the MAP sensor is supposed to go?

what is the next step?

best bet would be to just get a standard ecu and loom?

[Skylar]

You have an AW11 engine I think. Someone will know the answer for sure.

Best bet is to get correct loom and ECU or start over with an aftermarket ECU but looks like you're missing some plugs so you'll need a loom anyway. If you get a factory loom and ECU, you will have to get the AFM, coil/ignitor, etc. I'm pretty sure you can safely run either AW11 or early AE92 loom and computer but you'll need to switch to coilpacks for AE92 stuff.