KCJ - ZR-1 Net Registry Forums

KCJ · 10-04-2008

My 1990 ZR1 runs perfectly on Lower Engine Power setting. When switched to Max it misses, looses power and runs roughly. New injectors and ECM were installed recently, same old PROM. The little pump near the right side headlight seems to run all the time with may be 10 second stops.
Any ideas?
Also, know of any Good ZR1 techies n Ontario, Canada?
Many thanks

jonszr1 · 10-04-2008

sounds like you have a vacume leak in the secondary stuff thats under the plenum. corvette action center has a very good article on t shooting it.

tomtom72 · 10-05-2008

I agree: Tank, check valve, hose/spyder assembly, actuators.....outside shot is also the control solenoid, but that's a long shot. Pump should run at start up for a bit and then go dark if the system is tight.

If you're careful you can r&r the plenum and reuse the gaskets in a pinch.

http://corvetteactioncenter.com/foru...threadid=14272

Paul Workman · 10-05-2008

Nothing to add to the other posters (I would have said the same), except to say "Hullo!" Some of the finest folks anywhere to be found here - help with knowledge and parts and just good ol camaraderie!

Getting kinda chilly up thar already, isn't it??

P.

A26B · 10-05-2008

If you do need gaskets or seals, send me an email to A26B@aol.com.

KCJ · 10-05-2008

Quote:

Originally Posted by jonszr1

sounds like you have a vacume leak in the secondary stuff thats under the plenum. corvette action center has a very good article on t shooting it.

Thanks a lot! Read the article and it is very edifying.
Chris

KCJ · 10-05-2008

Quote:

Originally Posted by tomtom72

I agree: Tank, check valve, hose/spyder assembly, actuators.....outside shot is also the control solenoid, but that's a long shot. Pump should run at start up for a bit and then go dark if the system is tight.

If you're careful you can r&r the plenum and reuse the gaskets in a pinch.

http://corvetteactioncenter.com/foru...threadid=14272

Thanks much!

KCJ · 10-05-2008

Quote:

Originally Posted by A26B

If you do need gaskets or seals, send me an email to A26B@aol.com.

Thanks very much. Will contact you for the gaskets.
How much for the set?
How can I tell what number my ZR1 is?
Chris

KCJ · 10-05-2008

Quote:

Originally Posted by Paul Workman

Nothing to add to the other posters (I would have said the same), except to say "Hullo!" Some of the finest folks anywhere to be found here - help with knowledge and parts and just good ol camaraderie!

Getting kinda chilly up thar already, isn't it??

P.

Yup, but not as windy as where you are!
Thanks.

A26B · 10-05-2008

Quote:

Originally Posted by KCJ

Thanks very much. Will contact you for the gaskets.
How much for the set?

Plenum gaskets are $23.50 for set + shipping. When you decide, send me an email with full name & shipping address & I will send you an invoice back with shipping cost.

Quote:

How can I tell what number my ZR1 is?

I'm not sure what you mean but the last 4 numbers of your VIN is what I think you may be referring to.

Jerry

10-04-2008	#1
KCJ Join Date: Oct 2008 Location: Ontario Canada Posts: 6	ZR1 max power not working My 1990 ZR1 runs perfectly on Lower Engine Power setting. When switched to Max it misses, looses power and runs roughly. New injectors and ECM were installed recently, same old PROM. The little pump near the right side headlight seems to run all the time with may be 10 second stops. Any ideas? Also, know of any Good ZR1 techies n Ontario, Canada? Many thanks Last edited by KCJ; 10-04-2008 at 06:25 PM. Reason: New to site.Wish to improve posting

10-04-2008	#2
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: KCJ sounds like you have a vacume leak in the secondary stuff thats under the plenum. corvette action center has a very good article on t shooting it.

10-05-2008	#3
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: KCJ I agree: Tank, check valve, hose/spyder assembly, actuators.....outside shot is also the control solenoid, but that's a long shot. Pump should run at start up for a bit and then go dark if the system is tight. If you're careful you can r&r the plenum and reuse the gaskets in a pinch. http://corvetteactioncenter.com/foru...threadid=14272 __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

10-05-2008	#4
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Welcome! Nothing to add to the other posters (I would have said the same), except to say "Hullo!" Some of the finest folks anywhere to be found here - help with knowledge and parts and just good ol camaraderie! Getting kinda chilly up thar already, isn't it?? P.

10-05-2008	#5
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,394	Re: KCJ If you do need gaskets or seals, send me an email to A26B@aol.com. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.