Secondarys - ZR-1 Net Registry Forums

terry mckeown · 09-05-2010

Hope someone can help.
How does one know if his secondarys are opening?
My vacuum pump does cycle on and off when the ignition is on but engine is not running.
When I changed my injectors this spring the left side secondary was not operating very smoothly from the diaphram, lubed it and it was better.
I can't seem to get a better 1/4 mile time than 13.7 sec. Two years ago I could get a 13.2 sec. no problem.
If the vacuum pump is suspect where do I start.
Thanks

tccrab · 09-05-2010

Everything you needed to know about your secondary port vacuum system and more:
http://www.corvetteactioncenter.com/...read14272.html

TomC
'Crabs

09-05-2010	#1
terry mckeown Join Date: Apr 2008 Location: Cambridge, ON. Canada Posts: 14	Secondarys Hope someone can help. How does one know if his secondarys are opening? My vacuum pump does cycle on and off when the ignition is on but engine is not running. When I changed my injectors this spring the left side secondary was not operating very smoothly from the diaphram, lubed it and it was better. I can't seem to get a better 1/4 mile time than 13.7 sec. Two years ago I could get a 13.2 sec. no problem. If the vacuum pump is suspect where do I start. Thanks

09-05-2010	#2
tccrab Join Date: Oct 2004 Location: Folsom CA Posts: 1,653	Re: Secondarys Everything you needed to know about your secondary port vacuum system and more: http://www.corvetteactioncenter.com/...read14272.html TomC 'Crabs __________________ TomC '90ZR1 #792 Honorary Pirate [B]If it ain't FUN, you're doing something terribly WRONG. [/B]