SilveradoDude
Junior Member
- Joined
- Nov 19, 2018
- Posts
- 6
- Reaction score
- 2
- Location
- USA
- First Name
- Troy
- Truck Year
- 1985
- Truck Model
- Silverado
- Engine Size
- 305
Just wanted to piggy back on this post. I also have an '85 with a 305 Quadrajet and I want to do the same thing.
Would the diagram that you provided work for my truck?
My specs
- I have the UHK vacuum setup
- Don't use cruise control
- I haven't removed air pump yet
- I am assuming with the EGR and EFE valves I just leave them where they are and plug those up
- plug the unused ports on the carb
- removed A/C
- Also not running Electronic Ignition Control and using 84 distributor
I'd like to remove the following:
- EGR valve
- Decel valve
- Delay valve
- Diverter valve
What is the bowl vent in your diagram?
Would the diagram that you provided work for my truck?
My specs
- I have the UHK vacuum setup
- Don't use cruise control
- I haven't removed air pump yet
- I am assuming with the EGR and EFE valves I just leave them where they are and plug those up
- plug the unused ports on the carb
- removed A/C
- Also not running Electronic Ignition Control and using 84 distributor
I'd like to remove the following:
- EGR valve
- Decel valve
- Delay valve
- Diverter valve
What is the bowl vent in your diagram?
Okay UHJ = 5.0, federal emissions (not CA), AT and not high altitude:
Here is the original vacuum routing diagram - same as on your radiator support:
You must be registered for see images attach
You didn't respond to the EGR or Thermac questions. So I'll just guess and go with EGR delete and keep the Thermac functional - and just do the best that I can.
This is what you should end up with when you're done stripping all the unused tubing, vacuum switches and delay valves;
You must be registered for see images attach
With the vacuum routing as shown above, you will retain full functionality of the EES (evaporative emissions system), ESC and the Thermac system - along with vacuum advance for the distributor and a vacuum supply for the cruise control and HVAC control. And your engine will look a lot cleaner.