Secondaries issue... - Page 2 - ZR-1 Net Registry Forums

Ccmano · 06-04-2017

Quote:

Originally Posted by XfireZ51

Hans,

U getting any codes when u go WOT?

Had a chance to check this evening. No codes are stored. This should support the fuel pump theory.
H

XfireZ51 · 06-04-2017

Quote:

Originally Posted by Ccmano

Had a chance to check this evening. No codes are stored. This should support the fuel pump theory.
H

So when u mash the throttle, u r not getting a lean code or secondary throttle code? U r not just checking the history right?

Ccmano · 06-05-2017

When I drove it the other day I did not get any codes. I'll drive it again today and check again. Also want to drive without the intake accordion to check that. I've had the drivers seat apart all weekend fixing the switches and pump.

Did some clean up on the seat with Adams leather conditioner. Came out beautiful.
H

Roadster · 06-05-2017

That seat does look good for 180k, looks better than my 94 driver's seat @70k.
My side bolster is worn, yours has hardly any wear, if that.....

Ccmano · 06-05-2017

Secondary issue resolved! Took her out with the accordion piece removed to check if that was an issue and to check for codes. Well... she runs like a top! Secondaries kick in strong with no codes. Looks like the intake accordion was collapsing in a major way.

Paul... you were on the money. Now to construct some accordion hoops. I will go ahead and replace the fuel pumps anyway since they tested mariginal.

For a 180k car, she runs like a a Z should. Pulls strong right up to 7plus k rpm. I continue to be impressed.
H

jss06c6 · 06-05-2017

Interesting! Just took mine out and the LT-5 pulled like a freight train to 7,000, but if you are having issues with the intake tube between the filter and the throttle body, I'm going to see if I have any flex as well. Is it possible that it's a combination of air filter restriction and the flex duct age causing collapse? Mine only has 40k miles, but it's almost the same age ('91).

PS: Dominic, #473 is running like it's pants are on fire! I'm VERY happy with my tune! Thanks for the help..

Steve

Sent from my QTAIR7 using ZR-1 Net Registry mobile app

Ccmano · 06-05-2017

Quote:

Originally Posted by jss06c6

Interesting! Just took mine out and the LT-5 pulled like a freight train to 7,000, but if you are having issues with the intake tube between the filter and the throttle body, I'm going to see if I have any flex as well. Is it possible that it's a combination of air filter restriction and the flex duct age causing collapse? Mine only has 40k miles, but it's almost the same age ('91).

PS: Dominic, #473 is running like it's pants are on fire! I'm VERY happy with my tune! Thanks for the help..

Steve

Sent from my QTAIR7 using ZR-1 Net Registry mobile app

Steve,
This has been a known issue for years. I had forgotten about it. Just about everybody I know has some sort of reinforcement or changes out the accordion altogether. It is certainly a good possibility for you.
H

PhillipsLT5 · 06-05-2017

http://www.zr1specialist.com/HAT%20W...ucts/hoops.htm

http://www.jerrysgaskets.com/duct-si...lue-90-95-12a/

XfireZ51 · 06-06-2017

Mine has the phenolic insert. Not sure they are still available.

jss06c6 · 06-06-2017

I'll pull mine off and check it out. John Boyd may have taken care of it before I bought the car from him in 2013. Thanks for the alert!

Steve

Sent from my QTAIR7 using ZR-1 Net Registry mobile app

06-05-2017	#13
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Secondaries issue... When I drove it the other day I did not get any codes. I'll drive it again today and check again. Also want to drive without the intake accordion to check that. I've had the drivers seat apart all weekend fixing the switches and pump. Did some clean up on the seat with Adams leather conditioner. Came out beautiful. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

06-05-2017	#14
Roadster Join Date: Mar 2014 Location: Warrington PA Posts: 1,913	Re: Secondaries issue... That seat does look good for 180k, looks better than my 94 driver's seat @70k. My side bolster is worn, yours has hardly any wear, if that..... __________________ Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member

06-05-2017	#15
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Secondaries issue... Secondary issue resolved! Took her out with the accordion piece removed to check if that was an issue and to check for codes. Well... she runs like a top! Secondaries kick in strong with no codes. Looks like the intake accordion was collapsing in a major way. Paul... you were on the money. Now to construct some accordion hoops. I will go ahead and replace the fuel pumps anyway since they tested mariginal. For a 180k car, she runs like a a Z should. Pulls strong right up to 7plus k rpm. I continue to be impressed. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

06-05-2017	#16
jss06c6 Join Date: Aug 2015 Location: Magnolia, Texas Posts: 884	Re: Secondaries issue... Interesting! Just took mine out and the LT-5 pulled like a freight train to 7,000, but if you are having issues with the intake tube between the filter and the throttle body, I'm going to see if I have any flex as well. Is it possible that it's a combination of air filter restriction and the flex duct age causing collapse? Mine only has 40k miles, but it's almost the same age ('91). PS: Dominic, #473 is running like it's pants are on fire! I'm VERY happy with my tune! Thanks for the help.. Steve Sent from my QTAIR7 using ZR-1 Net Registry mobile app

06-05-2017	#18
PhillipsLT5 Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 2,450	Re: Secondaries issue... http://www.zr1specialist.com/HAT%20W...ucts/hoops.htm http://www.jerrysgaskets.com/duct-si...lue-90-95-12a/ Last edited by PhillipsLT5; 06-05-2017 at 10:28 PM.

06-06-2017	#19
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,669	Re: Secondaries issue... Mine has the phenolic insert. Not sure they are still available. __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

06-06-2017	#20
jss06c6 Join Date: Aug 2015 Location: Magnolia, Texas Posts: 884	Re: Secondaries issue... I'll pull mine off and check it out. John Boyd may have taken care of it before I bought the car from him in 2013. Thanks for the alert! Steve Sent from my QTAIR7 using ZR-1 Net Registry mobile app