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Spyder 99 Spyder GS 4G64 to 4G63T swap?

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Racersedge

Probationary Member
9
2
Jan 21, 2023
Macomb County, Michigan
Anyone, know how to change 99’ Eclipse GS Spyder Automatic fuse box to 99’ Eclipse Automatic GST fuse box?

Some threads I’ve read, says keep the 99’ Eclipse GS fuse box in it, but the male to male plugs from the GST harness to the GS fuse box isn’t a Plug n’ Play situation.

Any and all help with this would greatly be appreciated

Steps have taken so far,

On my 99’ Eclipse GS Spyder, I’ve taken out the 4G64 and built a 4G63T w/Big 16 Turbo.
And have taken out the Stock 4G64 engine harness and replaced with a 99’ Eclipse GST engine harness but ran into the problem of the GS fuse box won’t plug into the GST engine harness.

I’ve gotten a 2G 99’ Eclipse fuse box and now, after threads have read some say keep the GS Fuse Box and not use the 2G GST fuse box.

To get this done right, I’m hoping to find someone to shine light on this before cutting up any wiring that don’t need to.

Any and all help would be appreciated

Also, have gotten a 96’ ECU with a EPROM to ECMTuning the ECU and reprogram to run the 4G63T engine with the Big 16 Turbo.

Thanks,

May have forgotten to mention, This is a 7 Bolt 4G63T Engine to replace the 4G64 engine that was in my 99’ Eclipse GS Spyder N/T

All help is appreciated on this engine swap.
 
Last edited by a moderator:
Looking for some advice on my 99’ Eclipse Spyder GS N/T 4G64 engine swap to a 4G63T 7-bolt w/Big 16 Turbo. I have gotten a GST engine harness, but the 2G GS fuse box has a male plug and the GST has a male plug.

I’ve got 2G 99’ Eclipse fuse box and has the female end on the fuse box side and the GS engine harness has the female end.

Is this a pin job on the GS fuse box like some threads say or do I need to wire in the GST box?

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And the GS fuse box to GST harness are both male plugs and have gotten a 2G 99’ GST fuse box, but threads I’ve read says use the GS fuse box and I'm not sure what I should do.

Any and all help to get this correct would be appreciated,

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