73 Delay Relay
Race Director
Joined: May 2006
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Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Does your car have air conditioning? My '71 w/A/C has a 3 second delay relay that energizes the A/C compressor clutch when the ignition key goes from "RUN" to "OFF". That puts a load on the engine that is trying to shut down, and prevents it from deisel 'run-on'. Then, after 3 seconds, it turns back off.
Team Owner
Joined: Sep 2006
Posts: 31,271
Likes: 4,362
From: Westminster Maryland
Hi,
On 71 cars the delay relay was used to hold the start-up rpm of a warm engine, (no choke in operation), a few hundred rpm higher than it would normally be for emission purposes. The delay to normal idle rpm is about 20 seconds.
It's the relay closest to the firewall in this picture.
In 73?
Regards,
Alan
On 71 cars the delay relay was used to hold the start-up rpm of a warm engine, (no choke in operation), a few hundred rpm higher than it would normally be for emission purposes. The delay to normal idle rpm is about 20 seconds.
It's the relay closest to the firewall in this picture.
In 73?
Regards,
Alan
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,482
From: Southbound
Cruise-In II Veteran
