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

Ccmano · 06-02-2017

Looking for some group input. Still a little rusty at this.

Power key on... nothing happens, no kick in pants. So far I've done the pink wire test and confirmed the activation works. The vacuum pump barely runs with the ignition on so i don't see a leak. Power key light comes on. Oil temp gauge reads about 120 to 180 under normal driving. Going to check the fuel pumps next.

Interesting... getting 7amps and 49# at rest using Paul's sticky method, question is, is that enough to get nothing out of the secondaries? My guess is that the primary pump is good, she drives and idles nicely. The secondary pump must be close to dead. I think I'll pull the fp1 fuse and see what I get.

Fp2 by itself (fp1 fuse pulled) does 3.3amps and 49#. Still not sure if that by itself would cause the secondary issue.

Any thoughts?
H

efnfast · 06-02-2017

Other than "kick in the pants" are you sure they aren't opening?
Somewhere safe, punch it. If it only revs to 5k or so, no secondaries. If it whips to 7 grand...

LGAFF · 06-02-2017

So cheap why not replaced them....

Ccmano · 06-02-2017

Quote:

Originally Posted by LGAFF

So cheap why not replaced them....

The pumps? Already ordered them...
H

ssrszz4 · 06-02-2017

If the car races to 7000 it might be if you don't have a good history of car the secondaries may have been taken out or disabled at sometime.

Sent from my XT1585 using ZR-1 Net Registry mobile app

Ccmano · 06-02-2017

Trust me guys, this is my second Z, I know the difference between full power and normal power. On this car there is no difference between power key on or off. The test where 12 volts is applied to the pink wire on tHe control unit moves the actuators. I can see and hear them move. I may very well have to pull the plenum and test everything.

Just want to make sure I haven't missed anything obvious.

Thanks
H

Paul Workman · 06-03-2017

Quote:

Originally Posted by Ccmano

Looking for some group input. Still a little rusty at this.

Power key on... nothing happens, no kick in pants. So far I've done the pink wire test and confirmed the activation works. The vacuum pump barely runs with the ignition on so i don't see a leak. Power key light comes on. Oil temp gauge reads about 120 to 180 under normal driving. Going to check the fuel pumps next.

Interesting... getting 7amps and 49# at rest using Paul's sticky method, question is, is that enough to get nothing out of the secondaries? My guess is that the primary pump is good, she drives and idles nicely. The secondary pump must be close to dead. I think I'll pull the fp1 fuse and see what I get.

Fp2 by itself (fp1 fuse pulled) does 3.3amps and 49#. Still not sure if that by itself would cause the secondary issue.

Any thoughts?
H

Too low. This (current draw) is but a prelimimary, static test; a lipnos test of sorts. Monitoring fuel pressure while driving, especially at WOT, IS THE "ACID" test. That said, you wouldn't be wrong to be thinking of replacing the pumps: 3.3A...is not right.

AND, that said, are we sure the "accordion" air hose is NOT collapsing? That too can severely hamper the "seat of the pants" thrust of the secondaries opening. Jerry's Gaskets has the Samco type hose replacement, or Marc Haibeck provides some wire rib loops to reinforce the OE hose to keep it from crushing under hot, WOT periods. And, you may recall that I built an aluminum inner sleeve to not only reinforce the OE hose, but smooth the air flow to reduce drag and (theoretically) increase air flow. Just a thought.

.

XfireZ51 · 06-03-2017

Hans,

U getting any codes when u go WOT?

Ccmano · 06-03-2017

Paul, good point, the accordion piece looks very suspicious. Think I'll take it off and go for a drive. Had Haibeck pieces on the other car.

Dom, I should probably do that. I haven't checked for codes because there no lights on in the DIC.

Funny, for me the best part is the challenge of working on these cars.
H

Paul Workman · 06-03-2017

Quote:

Originally Posted by Ccmano

Paul, good point, the accordion piece looks very suspicious. Think I'll take it off and go for a drive. Had Haibeck pieces on the other car.

Dom, I should probably do that. I haven't checked for codes because there no lights on in the DIC.

Funny, for me the best part is the challenge of working on these cars.
H

Yeah. Its a sickness...

06-02-2017	#1
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Secondaries issue... Looking for some group input. Still a little rusty at this. Power key on... nothing happens, no kick in pants. So far I've done the pink wire test and confirmed the activation works. The vacuum pump barely runs with the ignition on so i don't see a leak. Power key light comes on. Oil temp gauge reads about 120 to 180 under normal driving. Going to check the fuel pumps next. Interesting... getting 7amps and 49# at rest using Paul's sticky method, question is, is that enough to get nothing out of the secondaries? My guess is that the primary pump is good, she drives and idles nicely. The secondary pump must be close to dead. I think I'll pull the fp1 fuse and see what I get. Fp2 by itself (fp1 fuse pulled) does 3.3amps and 49#. Still not sure if that by itself would cause the secondary issue. Any thoughts? 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.

06-02-2017	#2
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,492	Re: Secondaries issue... Other than "kick in the pants" are you sure they aren't opening? Somewhere safe, punch it. If it only revs to 5k or so, no secondaries. If it whips to 7 grand...

06-02-2017	#3
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: Secondaries issue... So cheap why not replaced them.... __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-02-2017	#5
ssrszz4 Join Date: Jan 2017 Location: US Posts: 233	Re: Secondaries issue... If the car races to 7000 it might be if you don't have a good history of car the secondaries may have been taken out or disabled at sometime. Sent from my XT1585 using ZR-1 Net Registry mobile app

06-02-2017	#6
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Secondaries issue... Trust me guys, this is my second Z, I know the difference between full power and normal power. On this car there is no difference between power key on or off. The test where 12 volts is applied to the pink wire on tHe control unit moves the actuators. I can see and hear them move. I may very well have to pull the plenum and test everything. Just want to make sure I haven't missed anything obvious. Thanks 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.

06-03-2017	#8
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: Secondaries issue... Hans, U getting any codes when u go WOT? __________________ [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

06-03-2017	#9
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Secondaries issue... Paul, good point, the accordion piece looks very suspicious. Think I'll take it off and go for a drive. Had Haibeck pieces on the other car. Dom, I should probably do that. I haven't checked for codes because there no lights on in the DIC. Funny, for me the best part is the challenge of working on these cars. 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.