Interesting find..

[TurboTerror21]

Troubleshooting a lack of VSS signal to the ecm on my 87 grand national, I found a lack of continuity on the brown wire from the speed sensor buffer (green box) to pin A10 of the ecm. Turn out the wire runs through a connector that is about 14" from the ecm, and is buried behind the passenger kick panel. I found the male terminal on the VSS wire was completely bent over and not making contact. But here's the thing, the foam wrapped around the connector was 100% unopened and appeared original

Could this car have had a CEL code it's whole life? No lock up torque converter ever?

The speedometer does have markings on it that it was serviced in 1991, were they chasing the problem but didn't know how to fix it?

 

[wdxwrx]

It's possible. A lot of techs were not good at diagnosing problems with these new high-tech cars in the late 80's and early 90's.
Discovered a similar issue with a GN I bought in 1989. The car was burned. It was obvious that it was set on fire. I parted the car out. After I took the body off the frame, I discovered a major dent in the fuel supply line at the rear of the car. This dent could not be seen with the body on. It was obvious that the dent was there when the car was manufactured. My guess is the car never ran right under full throttle from day one. The dealer couldn't figure it out. The owner got disgusted and burned the car for the insurance money. This is only a guess, but the dented fuel line was real. The pic is the actual car. I paid $200 for it.