Will 86 ECU work on 88 car?
10-06-03, 03:09 PM
#1
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Will 86 ECU work on 88 car?
My 88 ECU went bad I have a 86 parts car and was wondering if I could use the 86 ECU on my 88? THe numbers on the 88 ECU are N327 and the 86 are N326.
10-06-03, 03:12 PM
#2
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Yep, they are totally interchangeable. Been there, done that.
I think the newer ECU just has a newer code revision - nothing's ever conclusively been found as to a major difference, at least as far as I know.
Dale
I think the newer ECU just has a newer code revision - nothing's ever conclusively been found as to a major difference, at least as far as I know.
Dale
10-06-03, 04:18 PM
#5
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It doesn't matter - the ECU doesn't know.
The resistor pack for the low-impedence fuel injectors is downstream of the ECU, so all the ECU see is the "proper" impedence.
Swap the ECUs, it should work.
-Ted
The resistor pack for the low-impedence fuel injectors is downstream of the ECU, so all the ECU see is the "proper" impedence.
Swap the ECUs, it should work.
-Ted
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10-06-03, 05:14 PM
#8
Originally posted by RETed
It doesn't matter - the ECU doesn't know.
The resistor pack for the low-impedence fuel injectors is downstream of the ECU, so all the ECU see is the "proper" impedence.
Swap the ECUs, it should work.
-Ted
It doesn't matter - the ECU doesn't know.
The resistor pack for the low-impedence fuel injectors is downstream of the ECU, so all the ECU see is the "proper" impedence.
Swap the ECUs, it should work.
-Ted
I need to quit using paint thinner in poorly ventilated areas....
Jarrett
10-06-03, 05:31 PM
#9
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Alot of electronics have changed since 86-88 so No it wont work properly. or shouldnt anyways. Especially with the Injectors since 86 uses Low impedence injectors and 87 1/2 and up uses Hi impedence injectors.
You might cook a resistor or somthing in the ECU if you use HI injectors on a LI ECU
Justin
You might cook a resistor or somthing in the ECU if you use HI injectors on a LI ECU
Justin
10-06-03, 06:13 PM
#10
Umm, read my above post. The total resistance is the same. Doesnt matter if its an S4 or an S5. Its just that the S4 (or more importantly 86-87.5) used a 2 ohm injector and a 10 ohm resistor pack (all ohmic values are approximates). The later ones used an injector that had the 12 ohms of resistance built in, thus negataing the need for a resistor pack.
HOWEVER, the ECU still sees the same amount of resistance.
The only time that adding resistors becomes in issue is in my case, where I am adding a pair of GSL-SE injectors in my secondary positions. I need to add 2 resistors to the circut in order to balance the load from the ECU. This is because my car has no resistor pack, the primary injectors are the high impedence model.
Jarrett
HOWEVER, the ECU still sees the same amount of resistance.
The only time that adding resistors becomes in issue is in my case, where I am adding a pair of GSL-SE injectors in my secondary positions. I need to add 2 resistors to the circut in order to balance the load from the ECU. This is because my car has no resistor pack, the primary injectors are the high impedence model.
Jarrett
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