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2G Need help bringing my 2g GST back from the dead

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1995PrimerGST

Probationary Member
3
2
May 29, 2025
New York
I’ve owned my 95 GST for 15 years, it was my high school hot rod. It spun a rod, I had the motor rebuilt, I put it back in and drove it for a few weeks until it lost spark.

That was maybe 13 years ago. If I recall, I unplugged a plug and routed it better through the intake. When I went to plug it back in, I had two options and decided, what’s the worst that could happen? Went to start it and no spark. Tried the other plug, still no spark. I bought an evo and the car began to collect dust.

A few years later, maybe 2013? My dad tried replacing a few parts (I don’t recall exactly what) and had it running on 2 cylinders. I believe he jumped the coils and had it running rough on 4, took it for a spin and blew the head gasket. Fast forward to this year, I reassembled the motor and am ready to get it going!

I have everything back in, no leaks, motor sounds healthy when turning over, still no spark. I’ve noticed I have what I believe is a 1G cam angle sensor cable with a white wire cut. Should this be routed somewhere? It was covered under tape.

Any help would be greatly appreciated!

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I know you said it's not running on 2 cylinders any longer however, depending on which 2 could potentially point to your PTU which is that little black plug that sit between you intake manifold and your fuel rail that has the long connector plug into it.

I would definitely first fix up that white wire though. I don't have any direction for you regarding that unfortunately.
 
The white wire is for the 2g cam sensor, you have hooked up only the crank sensor.
The cam sensor has 3 wires, a red (positive), black (ground) and blue (signal).
You have to wire the white to the blue and leave the other two (red and black) wires disconnected and you should be fine.

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I guess I never realized it was 1g CAS swapped. I just bought another cheap 2g cam sensor to use the plug end and blue wire off it.

Assuming it ran with the 1g CAS and harness already, will I need to do anything else in order to get the 1g CAS to work properly?
 
A bit of research shows that being a 95 and not having ECMLink, I’ll need to not only verify spark plug wire order at the coils but also verify injector pin order at the ECU.

Could someone verify if that is the approach I should take?
 
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