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That's the right ECU. The problem might be from something else. We could probably offer some advice if you added some details to the "does not run right".

What's the number on yours? Share. Here's a Nissan Service Bulletin that I found on the internet a while ago. Looks like they all used the same, except for 1975, and 77 and 78 AT models. NTB94-097 (Nissan ECU Guide).pdf

Look at my MS3X install thread on Hybridz or the thread I did hear .

I can sense an Xmas gift to me from me ... !!!

Well I bought my 240z 16.5 years ago and decided I should see what it has cost me. I used it as a daily driver for the first 6 years and a summer/fun driver for the last 10. I added up all my receipts and the total came to $14,544.65 $1000.00 of that is the original purchase price back in 1998. $5614.58 went to general maintenance. This includes a partial engine rebuild, head gasket, a couple of starters (seem to have bad luck with those), and one alternator. It also includes a lot of trouble shooting various problems and minor maintenance items. $4425.07 went to body work. That includes $1600.00 in accident repairs (I HATE the 405). and $2700.00 for an amateur paint job that will need to be redone when I get the funds. $3505.00 went towards upgrades. Those include a Mallory distributor, new carbs from Z therapy, new wheels, new front bumpers, weather stripping, new seat foams, new leather upholstery, and some new badges. All in all it works out to about $73 dollars per month which is a pretty good bang for the buck. Especially when you factor the value of smiling every time you drive:)