Ported Vacuum Switch
#1
Ported Vacuum Switch
I have a question on this switch. I am putting an engine out of a 1974 Olds 98 into my 1970 Cutlass Supreme. I am going to put a new ported vacuum switch in, and it looks like they are different for the 2 years. Which one should I use?
#3
The 1974 cars don't use Transmission Controlled Spark because they have EGR to control NOx emissions. The 1974 ported vacuum switch is simply used to switch vacuum advance from ported to manifold if the engine starts to overheat.
Thread
Thread Starter
Forum
Replies
Last Post
Neuby7297
General Discussion
2
June 11th, 2019 09:06 AM