There is a guy in Montreal who tunes OBDI Nissan Computers, I told him about this project, and he says he could program a 94 Maxima OBDI ECU and make an harness adapter OBDI >OBDII so it will be 100% Plug & Play and replace the 1995 OBDII ECU.

That way he'll be able to re-map timing maps, fuel, rev limiter, ect.

Now my first reaction is since I wonder; How can a VQ run on an OBDI computer? Is it possible? The last VGs had Knock Sensors too, right?

I had previously asked him about tuning a 2002 Altima ECU, and he said he couldn't do an OBDII>OBDI conversion due to drive-by-wire, but on a 95 (first year OBDII), it's apprently possible.

Thoughts?

 

I though turd gens had distributer?

VQ30 uses crank ref sensor to alter timing, what does VG use?

 

Go for it...I would guess it's possible.

Any non-JWT route would be awesome.

 

Ignorant VQ owners Probably meant running it on a VE30DE ecu. Which would be nice as the manual ecu has ecu inputs for a varible intake.

 

My main beef with this route (if at all possible), is that I have not heard of anyone doing this on a VQ, and there are 46,000 members on this site

Not to mention, no known VQs ever ran on an OBDI computer.

I searched around a little on the net, and it's the same deal everywhere; everything from a Hunduhs to an M3 are getting more power with OBDI for the same exact mods.

Even though 95s are OBDII... they seem quite simple compared to later types. I mean, you can even run a manual tranny-equiped car with an auto computer, and vice versa.

 

Well I just found a 1994 SE (VE) Manual Transmission ECU for 40$US (And others in the same price range). Hopefully the f*ckers wouldn't pull the "we don't ship to Canada" bull again.

Still undecided.

 

Go for it, there is software that edits the 300zx ECU, so then maybe you can edit it whenever you want.

 

What bugs me is that if that is such a good option, why haven't others tried this on a maxima?

 

Maxima community is just really starting to pick up. Plus its still a family sedan. I also guess the guy working with nissans all the time is going to eventually experiment.

 

Maxima people = people who hate to try new things. Most people are negative.


Remember a few years ago, people said 00vi would not fit or clear hood. And now, so many people are doing the swap. Krismax took the chance and luckily he was right and it fits.

 

http://forums.maxima.org/showthread.php?t=324221

 

Anything can be made to work, you know that. Whether or not it's worth the effort is another story. If you are asking whether or not it's possible then sure it's possible. I know 3 guys personally who can tune OBDI nissan ECUs.

 

If all he needs to do it is what he mentionned... it would be cheaper altogether than getting a JWT ECU and the potential would go up.

 

If we could get this to work then ZEMulator would be a piece of cake to use. This might be a much more viable option over trying to adapt ZEMulator, or any other laptop programmable tuning to the A32 ECU. I am sure the VG/VE timing maps would be different but I would hope that it can be worked around.

As in the thread above the Z32 ECU uses a cam position sensor so you would have to divide the output by 2 from the crank position sensors.

This would definitely open up a lot more tuning opportunities for us. There are a lot of things that haven't been tried before on maximas. The 00VI and the VQ35 swap were "impossible" or not worth it only a few months ago.

Just to be sure the VG30DE and the VE30DE both use direct ignition, but the VG30E does not?

 

So I guess I have to walk in the dark again?

Hopefully this won't backfire on me like when I attempted to use the 2k2 wiring and my motto became "f*ck it".

EGR would go out the window, less emissions crap I guess... ABS would still work, right? ABS isn't affected by ECUs until 1999 I think.

He said he would perfectly adjust the fuel and timing maps to the VQ35DE.

 

What about the VQ30DE?

 

If he can do it for hte VQ35, the he can do it for the VQ30.

 

If that does succeed that would be an option for 4th gens, but it's illegal to do on a 1996+ vehicle. On 1995's it's legal to convert to OBDI since it wasn't required until the 1996 model year. Unless you could simply pull the OBDI ECU and adaptor, and throw the stock OBDII ECU back on. Not a problem for me, as we don't have emission in Canada, and it's a 1995 anyway.

 

So when do you plan on doing this?

 

In a few weeks, after I am sure the car works 100% and the clutch is broken in (and the money is there). I will try to do a before & after dyno if I don't feel too lazy.

 

that is correct

and arron used the a 300zx ecu on the ve in order to use the ZEM but as for the VQ the only thing i could see being a problem would be cam/crank sensor issues but even that could be programed out

 

I asked him and he said that wouldn't be a problem. It's incredible how much maxima modding potential has increased in less than a year.

The VQ35 is finally back in the car. Needs a few more parts to fire it up though... I have a full 2-day weekend this week (Finally!!) so I hope to have it running this weekend. I will run the stock 95 ecu for a few weeks to get used to the car, then I will look into this conversion.

 

i know who would have ever thought an NA max would break into the 12's @108 pretty amazing considering 13.99 was quite an accomplishment 2 years ago