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ECU swaps

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Old 10-01-03, 09:50 AM
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ECU swaps

I have a 1988 TII (S4) with what seems to be a faulty ECU. A friend can sell me a 1987 TII one. Question is: Can they be swaped, would it work?

Mine has the code N333, they one my friend has N327.

What's the difference.

Also, would a S5 ECU work? (meaning, would a 1989 TII ECU work on my 1988 TII for example?).

Really really appreciate any help.
Old 10-01-03, 09:52 AM
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I beleive the S4 will fit any S4 and the sme for the S5 ecu's

But I don't think that the N327 is a TII ECU I beleive that is an N/a ECU number.
Old 10-01-03, 01:25 PM
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https://www.rx7club.com/forum/showth...highlight=n327

https://www.rx7club.com/forum/showth...highlight=n327

https://www.rx7club.com/forum/showth...highlight=n327

But the other answers to this question can be found by going to the top of this page, clicking SEARCH and then typing in the numbers/letter N327 That works even better if you type in N327 on the left and then ICEMARK in the box to the right.

Last edited by HAILERS; 10-01-03 at 01:33 PM.
Old 10-01-03, 01:35 PM
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The short of it, is no a N327 will not work in a Turbo. A N327 ECU is for a non turbo.

and No a 89+ ECU will not work in a 86-88 without major rewiring.

Compatibility is the first 2 numbers... such as:

A N332 will work in a car with a N333, N334, N335, N338 etc.

A N326 will work in a car with a N327 N328 etc.

A N370 will work in a car with a N375...

get it yet???

The letter and first two numbers must match for it to be compatible... N33X N32X N35X
Old 10-01-03, 02:11 PM
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You also need to be careful of the impedance swich in mid 88(?),
Old 10-01-03, 04:16 PM
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Originally posted by banzaitoyota
You also need to be careful of the impedance swich in mid 88(?),
This shouldn't matter cause the resistor block is downstream of the ECU.&nbsp The ECU will see 10+ ohms no matter what - unless you're crazy to force it to run low impedence with no resistor block!


-Ted
Old 10-01-03, 04:25 PM
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Originally posted by Icemark

A N370 will work in a car with a N375...
You can add the N374 to that list as well, if you keep it accurate.
Old 10-01-03, 04:31 PM
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Originally posted by SonicRaT
You can add the N374 to that list as well, if you keep it accurate.
Yeah, I was getting bored of typing... I think I got the idea across.
Old 11-12-03, 04:50 PM
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anyone have a clue what the N318 is ? I have one , it's suppose to be off a Jspec TII but not sure if it's an S$ or S5.. neet to know becuse this is going onto a BRE
Old 11-12-03, 05:06 PM
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I don't want to steal the thread but I'm about to do a S4 Jspec NA conversion and I was wondering how I can tell if I need the injector resistor pack? What would happen if I tried to run the car without them?Burn up injectors?
Old 11-12-03, 05:35 PM
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Originally posted by PPC-Racing
anyone have a clue what the N318 is ? I have one , it's suppose to be off a Jspec TII but not sure if it's an S$ or S5.. neet to know becuse this is going onto a BRE
84-85 GSL-SE 'puter I would guess.
Old 11-12-03, 06:01 PM
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Originally posted by PPC-Racing
anyone have a clue what the N318 is ? I have one , it's suppose to be off a Jspec TII but not sure if it's an S$ or S5.. neet to know becuse this is going onto a BRE
ecu is from a 13bt and depending on chip # comes with either a 7500 rpm rev limit or none at all
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