[V8] '90 V8 No-start condition - need suggestions...

[Enzeder]

Howdi folks,
	I took the O2 sensor out to take a look.  As it was fairly new (few years 
old), I put it back in.  Now the car won't start.

What I've done:

1. Pulled the codes - the only code that came out was for G28 - engine 
speed sensor.  I followed the directions to test this, and it was fine, and 
there is a spark.  Apparently, if the ignition or engine speed sensors are 
bad, the car won't start, but I'm not sure what prevents the car from 
starting.  Anyone know?

2. Performed output tests for the ECU.  All results were normal.

3. Tested the fuel pump relay and fuel pump and everything tested ok.  No 
shorts, relay works, fuses are ok, etc.

4. Looked at the timing belt (I was afraid maybe it was stripped).  There's 
about 35K miles on it.


Does anyone one know exactly where ground connection 87 is?  It's listed as 
"Welded, in rear harness".  I'm guessing that's somewhere behind the B 
pillar, but where???

Thanks,
Arryn