Has anyone done a 1999 to 2000 ecu swap? If so, did you repin the harness? Wht else is required to be changed, the BCM?

Thanks in advance for your help.

Well... its pretty complicated...

The harness is plug and play on the ECU side, however you don't have a BCM, so you'd have to wire in a BCM, cluster, body harness, and quite a bit of other wiring.





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Ok, thanks.

Please clarify. What if I didn't add a BCM(body control module) to control the cluster, gauges etc. Yet, still added the ecu? Would I not have any cluster features or instrumentation working?

How does my 99 ECU process the instrumentation inputs now? Are they direct feeds, no BCM?

Thanks for responding.

I'm trying to figure all that out now for my ECU project, but as it stands, if you just put in a 2k+ ECU, you won't have the cluster at all. The 99 does not have a BCM, so it talks directly to the cluster, I have to pull up the wiring diagrams to see if it uses raw VSS, RPM, Temp, etc signals or speaks the VPW UART that the ECU does.





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Good info.

Please let me know what/when, you figure out. I don't want to create I'm going to buy a 2000 ecu tonight from the boneyard and I'm going to try a couple of things to see what happens.

Reun has a 2000 ecu in his 99....and he has some working gauges....if I remeber correctly.



PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

Listening...



2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R

If I'm correct you should be able to get a 2000+ dash harness (which has the hook up for the BCM, gauge cluster etc...) and it will plug into the engine bay harness block by the firewall. Put in the 2000+ ECU, do theft learn and go. I will look into this more because I have a dash harness lying around.



FU Tuning

^^Don't you also need the Fuel tank, Evap canister and lines? Evap is in the back on the 00+, so im sure all that wiring is different as well..

I want to do this swap as well, but not sure if its worth all the re-wiring..











~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

WHITECAVY wrote:^^Don't you also need the Fuel tank, Evap canister and lines? Evap is in the back on the 00+, so im sure all that wiring is different as well..

I want to do this swap as well, but not sure if its worth all the re-wiring..

Well if you use the pre 2000 engine bay harness the evap stuff is still going to be in the same place. I will do some research on this this weekend.



FU Tuning

HUM....... never thought of using engine harness from pre 00'



PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

On a side note. I downloaded a 2000 supercharger reflash file into my 99 pcm and it works. The only issue I have is with the BCM. All of the warning lights stay on. Also, the tach, and ect gauge don't work but the speedometer and fuel level do. Aside from the tach, ect and warning lights everything else works perfect.

You kinda need the tach though dont ya? lol











~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

I have an Autometer DPSS which has a tach and shift light. But yeah, I wasn't happy that the tach didn't work after the reflash. It's a small sacrifice to be able to run off MAP pressure.

J S wrote:On a side note. I downloaded a 2000 supercharger reflash file into my 99 pcm and it works. The only issue I have is with the BCM. All of the warning lights stay on. Also, the tach, and ect gauge don't work but the speedometer and fuel level do. Aside from the tach, ect and warning lights everything else works perfect.

So you changed nothing and just downloaded the 2000 tune on your 99 computer?



PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

Yup. I also bought a 2 bar map. the car works perfect except for the warning lights being are always on, Tach is not working and ECT gauge is not working. Again, I have external gauges so I don't care. I made NO wiring changes. I'm running a turbo set-up and it hauls a$$.

OK, if one was to do this, and get a BCM could the wires be repined to the 99- cluster....or would a BCM and 00+ cluster be needed for no warning lights.

Damn E-check BS here in Ohio. GER Any warning lights or anything and you fail.




PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

-MD- LD9 wrote:OK, if one was to do this, and get a BCM could the wires be repined to the 99- cluster....or would a BCM and 00+ cluster be needed for no warning lights.

I am wondering the same exact thing.



2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R

A 00+ cluster would be needed, the 99- cluster doesn't know how to talk to the BCM no matter how you wire it.





4cyltuner.com - Information Source For 4 Cylinder Tuners
Buy stuff from CarCustoms Ebay! Won't be disappointed!

Ok, in theory. If one was to reflash a 00+ speed density tune on the 99 alpha-n PCM, and then buy a 00+ cluster and a BCM. It would all be plug-n-play and have no warning lights with all gauges functioning.

Yes I know the 00+ cluster will not fit in the 99- dash, but still.
This would work in theory right.



PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

Ahh i found it Mike lol.

Hmm, Ill have to try this..

Mike, why wouldnt the cluster fit in our 99's? Physically they are the same right?











~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

No Physically the 00+ is different angle and I think slightly bigger. I know they are different....do not remeber exactly what is different size wise.
They are close...but I do not know if they are close ENOUGH to fit right.





Edited 1 time(s). Last edited Monday, August 06, 2007 1:28 PM

PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

Ok, Ill have to borrow 1 of Treys 00+ cluster to see if it fits, then get a GM S/C flash from Whininz










~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

Well I just bought this. LOL



PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

You can make a 00+ cluster fit in a pre 00 car. Just need a little modifying.



FU Tuning