secondary port throttle solenoid - ZR-1 Net Registry Forums

mavhou · 10-24-2005

Hi,
I have a 1990 and am having the typical vacuum problems after a backfire. I have traced the leak to the secondary port throttle actuator solenoid. Thanks to all of your posts, I was able to get info on it as the local chevy dealers are zr1 idiots. Anyway, I just picked up the new part (1997222) and it had a vacuum port on the back side which my old one does not. Is this a revision with the later models? Do I simply plug it or should i T it into the vacuum system. If I Tee it in, should it be before the solenoid or past? Thanks for all the help. This is a great source of info and you guys do a great job.

mavhou

10-24-2005	#1
mavhou Join Date: Oct 2005 Location: Houston area Posts: 3	secondary port throttle solenoid Hi, I have a 1990 and am having the typical vacuum problems after a backfire. I have traced the leak to the secondary port throttle actuator solenoid. Thanks to all of your posts, I was able to get info on it as the local chevy dealers are zr1 idiots. Anyway, I just picked up the new part (1997222) and it had a vacuum port on the back side which my old one does not. Is this a revision with the later models? Do I simply plug it or should i T it into the vacuum system. If I Tee it in, should it be before the solenoid or past? Thanks for all the help. This is a great source of info and you guys do a great job. mavhou