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ecu differences and compatibilities

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Old 03-31-2009, 04:13 PM
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ecu differences and compatibilities
have a 97 gxe, auto, no abs, no lsd and need another ecu.
does it have to be from a 97 or will a 95,96,98 work?
i have a feeling 99 won't work but wanna make sure about the others as well.
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Old 03-31-2009, 04:15 PM
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IIRC you cannot use an ECU from a '95-'96. Not sure about the other years.
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Old 03-31-2009, 04:16 PM
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Everything but a '99 should work. There are several people running 95/96 modified ECUs in their later model year cars, and several running later year ECUs in their earlier cars.

Note that if you use a different model year or emissions spec ECU, you most likely will get a CEL for something missing.
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Old 03-31-2009, 04:24 PM
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Originally Posted by pmohr
Everything but a '99 should work. There are several people running 95/96 modified ECUs in their later model year cars, and several running later year ECUs in their earlier cars.

Note that if you use a different model year or emissions spec ECU, you most likely will get a CEL for something missing.
what do you have to modify for the earlier year ecms? can you just not "modify" and will it be ok, besides throwing off a CEL?
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Old 03-31-2009, 04:25 PM
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Originally Posted by G4nismo
what do you have to modify for the earlier year ecms? can you just not "modify" and will it be ok, besides throwing off a CEL?
If your not worried about throwing off a CEL, then theres no need to modify.
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Old 03-31-2009, 04:28 PM
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Originally Posted by ChrisMan287
If your not worried about throwing off a CEL, then theres no need to modify.
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Old 03-31-2009, 04:28 PM
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a 95 manual will not work in a 97 manual.. will throw codes for rear 02 and you cant get rid of it..

i have a 98 auto a 95 manual and a 97 auto.. if you need something let me know..
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Old 03-31-2009, 04:31 PM
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Originally Posted by f550maranello2
a 95 manual will not work in a 97 manual.. will throw codes for rear 02 and you cant get rid of it..

i have a 98 auto a 95 manual and a 97 auto.. if you need something let me know..
Really depends on what you define 'working' as, I guess.
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Old 03-31-2009, 04:32 PM
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alright thanks you guys. don't care about the CEL as long as it works fine.
f550, sent you a pm
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Old 03-31-2009, 04:35 PM
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oh one more thing, would power driver's seat matter or would that just throw another CEL again? car-parts.com listed that as one of the distinguishing factors

* Elec Cont Unit (ECU), (under center of dash), thru 10/96, GXE, AT, w/power driver's seat
* Elec Cont Unit (ECU), (under center of dash), thru 10/96, GXE, AT, w/o power driver's seat
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Old 03-31-2009, 04:35 PM
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Originally Posted by pmohr
Really depends on what you define 'working' as, I guess.
yea true i mean it will run the car... i just cant stand looking at a check engine light when i drive..
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Old 03-31-2009, 04:38 PM
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Originally Posted by f550maranello2
yea true i mean it will run the car... i just cant stand looking at a check engine light when i drive..
Mine quite nicely matches my Z33 6-disc, heh.

Originally Posted by G4nismo
oh one more thing, would power driver's seat matter or would that just throw another CEL again? car-parts.com listed that as one of the distinguishing factors

* Elec Cont Unit (ECU), (under center of dash), thru 10/96, GXE, AT, w/power driver's seat
* Elec Cont Unit (ECU), (under center of dash), thru 10/96, GXE, AT, w/o power driver's seat
It wouldn't throw a CEL, not sure why they list that. Either will work just fine.
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Old 03-31-2009, 04:42 PM
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so, i can just plug in a used one and it'll run fine? no reprogramming or anything?
pretty much plug n play?
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Old 03-31-2009, 04:43 PM
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Originally Posted by G4nismo
so, i can just plug in a used one and it'll run fine? no reprogramming or anything?
pretty much plug n play?
Correct. Anything under the '99 model year, you just plug it in and you're good.
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Old 03-31-2009, 04:45 PM
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I suggest getting a 5-speed ecu over a auto if possible to aviod high idle issues

but it's a small issue if you have no other option
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Old 03-31-2009, 04:46 PM
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Originally Posted by pmohr
Correct. Anything under the '99 model year, you just plug it in and you're good.
alright will take your word for it
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Old 03-31-2009, 06:23 PM
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Originally Posted by t6378tp
I suggest getting a 5-speed ecu over a auto if possible to aviod high idle issues

but it's a small issue if you have no other option
he cant run a 5mt ecu cus hes auto, needs the auto comp. and you have that high idle issue if yo urun an autoecu in a non auto car btw...
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