Question on wiring, vacuum, and timing

[Operator238]

1) Where do these connectors go on my 85 K5 /305?






2) Also, I have deleted the air pump and I want to get rid of all vacuum crap. Which vacuum lines do I absolutely need?

3) my timing tab has the teeth and a circle/hole. I imagine TDC is when the line is visible through the hole. How do I determine , say, 12*

 

[Wes Harden]

1st picture right connector to Hei power.
Was this a tbi engine ?

only vacuum you need is brake booster, dist vacuum advance and heater ac

 

[Operator238]

1st picture right connector to Hei power.
Was this a tbi engine ?

only vacuum you need is brake booster, dist vacuum advance and heater ac

No this is not a TBI

 

[Wes Harden]

What was it ? CCC ? the 2 cavity plug has me thining temp sender or egr solenoid, knowing what the fuel control system was will help

 

[Operator238]

It’s just a stock 1985 K5 5.0L, mechanical fuel pump, AVS2 carb

 

[Wes Harden]

what was it when gm made it. I know it isn't the same now, or it would be obvious where the wires go, or if you need them.

 

[Operator238]

It was just a 1985 K5 Silverado with 305, not sure other than that. It was not a Cali truck. Sorry I don’t understand

 

[imiceman44]

what was it when gm made it. I know it isn't the same now, or it would be obvious where the wires go, or if you need them.

85 had CCC carb, and ESC

 

[imiceman44]

What was it ? CCC ? the 2 cavity plug has me thining temp sender or egr solenoid, knowing what the fuel control system was will help

The 2 cavity plug looks like temp sensor to me too.
The one with the pink wire, looks like ignition wire into the distributor to me.
Is the distributor hooked up

 

[Blue85]

85 had CCC carb, and ESC

Trucks only got CCC for California. 49 states stayed normal carb until TBI.

 

[imiceman44]

Trucks only got CCC for California. 49 states stayed normal carb until TBI.

I thought all k5s got it
What about ESC?

 

[Blue85]

1) Where do these connectors go on my 85 K5 /305?

2) Also, I have deleted the air pump and I want to get rid of all vacuum crap. Which vacuum lines do I absolutely need?

I think the white 2-pin goes to the carb. It's for the dual-stage accelerator pump. This is one of the main reasons people mistake the mid-80's Q-Jets for "electronic" carbs.

Don't plan to delete "all vacuum crap". Look at each item individually and make a good decision.

 

[Blue85]

I thought all k5s got it
What about ESC?

Yes, I think ESC was used from 82-85. It may have been only on 305 engines, I'm sure the information is out there somewhere.