4AGE 20v OBDI to OBDII help Options

[igpx12]

What I'm looking at doing is kind of an experiment, obviously otherwise I wouldn't be looking for help. I don't know if this has been considered or done before, if it has can someone point me to a thread here or where its mentioned. What I have going on is a 7afe equipped 97 at200 being swapped to a 4age 20v silvertop. I was looking at running the AE111 Blacktop ECU to get rid of the AFM that the silvertop needed in order to run open ITBs, but having to meet emissions I'm left at kind of a roadblock, or so it seems. Both the AE111 ECU and 7AFE ECU run map sensors in order for that to work, only difference is the AE111 is not able to run OBDII. Soooooooo......

This is what I'm looking for, I have both Engines with all the sensors, ignitors and dizzies. Both wiring harnesses with fuse relays and both ECUs. I know there is the whole set up issue of the 4AGE not being OBDII ready, however if it were possible to say piggy back the ECUs to run the proper sensors and motor functions and to have the 7AFE ECU to run the OBDII side of things for the set up. Kinda of a mindf*&# I know, but it maybe a possibility as a hybrid option to work around for OBDII testing. Technically all the Electronics are there from the 7AFE, Only thing is its not setup to run the 4AGE.

So any ideas/support or knowledge of these systems and possible assistance would be much appreciated.

This post has been edited by igpx12: Aug 7, 2014 - 1:40 AM

[richee3]

I came into this thread expecting to make a post about JOBD and how the 4A-GE can't meet OBDII requirements, but now I'm in for results. It may be as easy as running a handful of wires from the 4A ECU to the 7A ECU, then have all of the OBDII wiring go to the 7A ECU. The sensors all work the same way between both engines so the inputs from the 4A sensors may just work and keep the 7A ECU happy. Of course, the 4A has no EGR so there will likely be a code thrown for that. But hypothetically this is possible, just so long as the 7A can't get a signal out for the timing or fuel trim. As long as those wires aren't connected, it can't feed back into the system. I'm definitely in for results. Please keep us posted.