Eliminating vacuum lines 454 engine

[Arch Hoagland]

Did you mean the Glenn Warner Soccer Facility? Ask her if she remembers the 800' radio tower behind her.

I climbed that tower half way. That was NSS...A radio transmitter site I was stationed at for three years. I repaired high power transmitters.

[Dav L]

I think you would be better off to just replace any old vacuum lines with new and connect it all up the way it was engineered to be.
Doesn't sound like you are an experienced mechanic so likely won't really understand then what you are disconnecting, what is then not working the way it was engineered and how to rectify problems incurred.

The engine is engineered as a system of parts. Hack one of the parts and the system is no longer intact. BTW, some of those open vacuum lines will let dirt into the motor and destroy it. Better get it resolved sooner than later. Hire a mechanic to freshen it up. One day of qualified labor can get a lot of maintenance stuff done.

[D Gardiner]

1984 was a heavy use era of vacuum controlled systems for emission and engine functions.

With that said, the 1980s heavily relied on coolant temperature operated vacuum control valves. This was the era I began working on cars in. These valves required quite a bit of knowledge. From when they opened and closed, to diagnose properly. You may need to research if any of these valves are available from say, Napa.
Yeah, it was a fun era.

These vacuum valve systems delay how early an EGR would operate at, or when a distributer advance would see a vacuum signal. Deleting any of these systems is easy, however it will require retrofitting older style mechanical and vacuum advance distributer, and most likely removing the Rochester carburetor, for as friendly aftermarket carburetor that is easy to re-et.

When GM went to the TBI injection system, engine returned to the era of a PCV valve, EGR and fuel vapor controls, everything else fell away. I assume you want to go back to the era of the late 60's were an engine had a PCV and a distributer which had mechanical and vacuum advance line to the distributer. To do this you will want to source companies like Jegs, or Summit to get the correct (pre-smog era) vacuum advance distributer, and a simpler carburetor that you can reject. It is doable, but you just can't remove vacuum lines and make it all work, without addressing the other systems.
Below is a picture of a typical vacuum coolant ] temperature controlled valve.
Good Luck.

[EyezOpen]

Originally Posted by D Gardiner

1984 was a heavy use era of vacuum controlled systems for emission and engine functions.

With that said, the 1980s heavily relied on coolant temperature operated vacuum control valves. This was the era I began working on cars in. These valves required quite a bit of knowledge. From when they opened and closed, to diagnose properly. You may need to research if any of these valves are available from say, Napa.
Yeah, it was a fun era.

These vacuum valve systems delay how early an EGR would operate at, or when a distributer advance would see a vacuum signal. Deleting any of these systems is easy, however it will require retrofitting older style mechanical and vacuum advance distributer, and most likely removing the Rochester carburetor, for as friendly aftermarket carburetor that is easy to re-et.

When GM went to the TBI injection system, engine returned to the era of a PCV valve, EGR and fuel vapor controls, everything else fell away. I assume you want to go back to the era of the late 60's were an engine had a PCV and a distributer whibch had mechanical and vacuum advance line to the distributer. To do this you will want to source companies like Jegs, or Summit to get the correct (pre-smog era) vacuum advance distributer, and a simpler carburetor that you can reject. It is doable, but you just can't remove vacuum lines and make it all work, without addressing the other systems.
Below is a picture of a typical vacuum coolant ] temperature controlled valve.
Good Luck.

Good post lots of correct information, much has transpired since days of long ago, one would be the Rochester is a perfect carb for such a transition. Frankly it is modern marvel in many respects, unfortunately, there are few who grasp its ability and functionality. Always remember it was designed to be a emissions carb..that is short for very precise metering dependent on vacuum..and can be very frustrating if one does not understand all the working parts.

Below is a read that can be done and is very effective, it should also be known that if the AIR system is not working and cannot be restored doing the below modification will decrease emissions.

https://www.irv2.com/forums/f65/88-w...sue-56279.html

[Gump159]

Be sure to carry an extra ignition module and electric silicone for the distributor.....they do go out. Happy Trails!