Twitch

So i got a 1994 300 n/a and i need a new ecu for it. Im used to the s130 so i dont have much knowledge on this one.What all year 300s can i take the ecu out of to replace mine?Any help would be great.
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Glass Water Pipes

xpwarrior

You should be able to use any NA computer from 90-95 if you have a 5-speed. If you have an auto then you need the computer for an auto. You can use an ECU from an auto car on a 5-speed you will just get a trouble code for the transmission. In 96 they went to OBDII so those ECUs are different.

Here's a link to verify the ECU numbers.
http://www.jimwolftechnology.com/wolfpdf/ECU-ID.PDF

ZLover4Life

You also need to differentiate between Cali and Fed emissions.

xpwarrior

That's true if you use a Cali ECU it will be expecting an EGR temp signal and will give you a code 35 without it. Will this cause any problems? If you use an auto ECU in a 5-speed you get a trouble code there also but doesn't appear to cause any problems. I think they added the EGR temp sensor to both Fed & Cal cars in 94-95 so for Twitch it might not make a difference either way.

Twitch I may have an extra ECU that I might part with. It's Fed and for an auto. I'll check when I get home.

nismo619

so what your saying is if you have a 1993 300zx auto and wanting to upgrade the ecu to say a 1990 or 1991 chiped ecu it will work just fine ? right ? how do you know if the car is fed or cali ?

ZLover4Life

Yes, especially in this case. Upgraded ECUs for all 90-95 Z32's (assuming same specifications, such as transmission, motor, injectors, intake) are identical. The only difference between upgraded ECUs between model years are injector changes, really.


Easiest way it so look into where the car was first sold (CarFax). lol If it was sold at a dealership in Cali, it's a Cali emissions car. Otherwise, you can check for the EGR temp sensor.

One of the digits in the VIN can also tell, but as TwinTurbo.NET's bookmarks are down, I can't get to the writeup that has that information.

Twitch

Thanks everyone. Xp warrior that would be great just let me know
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nismo619

can you use a manual ecu in a automatic ? this is the final question. :-) a 1991 ecu 8bit can be used in a 1993 300zx made for the 16 bit ?

ZLover4Life

Absolutely not.

CanyonCarver

I'm running an older 8-bit ecu with an Ashspec fed. chip in my '93 Cali car.