Turns out summit will put you on hold for so long you cant help but try and fix the problem yourself beyond all better judgement.. This time it paid off luckily. Managed to take the ring of strange electrical probe pin thingys, and gently massage this back into its correct location. The plug then went on the trans with no issues. Wont know til start up if its an issue, but if it is ill tackle the return process then.
Now that that was sorted, time to keep pluggin away a little day by day and cross things off the list for the PCM. Each harness that plugs into the terminator ports, has its own switched 12v power source for the relays, solenoids or whichever dedicated power it needs. There are a total of 5 grounds for the PCM and harnesses.
So far this is where im at....
PCM main power harness:
-12v directly to the battery (dedicated post)
-Ground directly to the battery (dedicated post)
-12v `to switched power source ( 12v while cranking ) / connected to the tan wire in the bulkhead for the distributor.
Trans control harness:
-12 volt switched power into ACCSY port on fuse block ( dedicated )
- Chassis ground ( yet to be determined )
- Speed turbine plug ( 4l80 only ) unused
- VSS speed sensor
- Trans control main plug.
DBW harness:
-12v switched power into ACCSY port on fuse block (dedicated )
- 12v brake switch for torque converter to unlock. ( wired into the white wire in the brake switch )
- Chassi ground.b ( YTD )
- Holley states the PCM has only been used and calibrated for a specific gm pedal. I did get the pedal from the donor, but ive ordered up the PN provided by holley incase the OE pedal doesnt work. Its one of those wierd all plastic pedals with barely and pedal movement..
- Throttle position sensor/motor on order as i broke the tabs off the one that came with the motor, so the clip doesnt work to secure it.
Engine harness:
-12v switched wired into the fuse block.
- Two grounds located on the back of each cylinder
- IAC unused
- TPS unsued
- Coil harnesses on order.
- Manifold air temp drilled and installed in intake tube.
- Crank sensor and knock sensors in.
- O2 sensor / Installed.. but as usual i didnt check the clearances on anything, and having blind faith that things will work out only gets you so far. Put the collector in the vise, eyeballed a ten percent angle and drilled it, welded it... even painted it before checking. Either theres a monkey on my back or this is a little too close for comfort. Between the crappy headers and me not checking this is the result.




For now im going to call that a win. The linkage all moves freely with no contact, but its a bit of a clusterfug goin on. The only wires i have left to figure out are the chassis ground which i need to drill and secure somewhere accessible with the inner fenders on.
Turns out i had an inner fender i got from someone awhile back in the sea can and its for the side i need. Very solid, but needed a wire wheeling for sure. I installed it and im not sure what year or make its from, but its bent and also a tight fit. The white paint pen line is the area ill trim off around the top control arm area. Got that painted up and drying now.



Once thats installed i can mount and make the airbox bracket. The trans cross member will make the exhaust so much easier to route. Its going to be quite the frankenstein exhaust job using whatever i can find. luckily im not doing duals. Plan is single 3 inch exhaust, y pipe and drivers side dump at the back of the box. Hoping to get the cab on the quieter side after a k5 with no carpets, flow master 40 under the seat at 2600 rpm on the highway. Been finding some borla exhausts that are a nice, quiet but mean rumble...but for now this random 3 inch mufflers going in regardless of noise.
