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1990-1995 ZR-1 Secondary Port Vacuum Diagnosis

Willard

Member
Joined
Jan 23, 2011
Messages
8
Location
california
ZR1 Vacuum problem

The Secondary Port Throttle Control Solenoid is not working on my 1990 ZR1 and is no longer available. The dealer can only get one that looks similar part # 1997201. The connections are slightly different.
Anyone know if this part will work.
Thanks
 

HAWAIIZR1

Member
Joined
Mar 29, 2004
Messages
11
Location
Pleasant Hill, CA
Corvette
1990 ZR-1
The Secondary Port Throttle Control Solenoid is not working on my 1990 ZR1 and is no longer available. The dealer can only get one that looks similar part # 1997201. The connections are slightly different.
Anyone know if this part will work.
Thanks

Good question! BUMP!
 

xfirez51

Well-known member
Joined
Jun 2, 2007
Messages
280
Location
Chicagoland
Corvette
1992 Black Rose ZR-1
If this is the vacuum solenoid from a Suburban or Escalade. the answer is yes. This topic was
recently addressed at the ZR-1 registry. the bracket is different but can be modified to work.
 

Hib Halverson

Technical Writer for Internet & Print Media
Joined
Jan 10, 2001
Messages
13,453
Location
CenCoast CA
Corvette
71 04 12 19
Use the truck part because all you need do is adapt the different bracket to the LT5. With the other choice, it sounds like you have to change the wiring and connections which may decrease reliability/durability.

Anyone have the PN for the truck solenoid?
 

mmkkpro

Member
Joined
Jul 27, 2019
Messages
9
Location
Supply NC
Corvette
1990 white ZR1
Nice post, I am a new member here. I bought a 1990 ZR-1 about 2 months ago and am in the process of reconditioning everything and the list is long. I am getting ready to tackle the fuel injectors and am going to have to check everything else while I'm under the plenum. I have drag raced all my life and built many engines but this LT5 is a different beast, I'm a little intimidated by all the components under there. I have my shop manuals and am gathering everything in need now. Thanks for posting, greatly appreciated. 👍👍
 

Rob

Site Administrator
Staff member
Administrator
Joined
Sep 16, 2000
Messages
13,863
Location
New Hampshire
Corvette
1990 Corvette ZR-1
Is it possible to have the original post pictures restored? I think the link is broken as they dont seem to show up for me. Thanks
Fixed. Thank you for pointing this out to me!
 

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