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Old 10-07-2013   #11
Kevin
 
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Default Re: another day, another code...

talked with marc and another friend and we determined that "The secondary port vacuum solenoid could have an intermittent leak. The plenum needs to be removed to replace it. The secondary vacuum check valve could be intermittent." both of these are apparently rare, what luck I have....
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Old 10-07-2013   #12
XfireZ51
 
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Default Re: another day, another code...

Quote:
Originally Posted by Kevin View Post
talked with marc and another friend and we determined that "The secondary port vacuum solenoid could have an intermittent leak. The plenum needs to be removed to replace it. The secondary vacuum check valve could be intermittent." both of these are apparently rare, what luck I have....
If you strap the secondaries open, you can either throw in a chip that eliminates secondaries, or put in a plug to the DIFF MAP sensor harness connector so ECM is happy. Problem solved for good.
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Old 10-07-2013   #13
Blue Flame Restorations
 
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Default Re: another day, another code...

Before I bought my first Z, I knew that I would "rip them out" of whatever I bought. As luck would have it, Paul Denhert had already done so. Unfortunately, the other motor I used still had them, so we ripped them out as well. I just didn't want any aggrevation going forward.

Not for everyone but I never seem to hear of anyone ever putting them back in?????
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Old 10-07-2013   #14
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Default Re: another day, another code...

Quote:
Originally Posted by XfireZ51 View Post
If you strap the secondaries open, you can either throw in a chip that eliminates secondaries, or put in a plug to the DIFF MAP sensor harness connector so ECM is happy. Problem solved for good.
i was thinking chip + wire, but i'm on the fence. i'd like to drive a near stock car that way but I don't know anyone near by that has it done.
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Old 10-07-2013   #15
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Default Re: another day, another code...

Quote:
Originally Posted by Kevin View Post
i was thinking chip + wire, but i'm on the fence. i'd like to drive a near stock car that way but I don't know anyone near by that has it done.

Kevin this would give you a lot of piece of mind and is simple as wire and a PROM. Even if you decide to sell your car this is a selling point as you will eliminate a reason to pull the plenum in the future for a secondary vaccum issue. its also not permament and can be return to stock by simply pulling the wires and putting the stock chip back in. GC
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91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat

90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat

11 RED/GREY CTS-V
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Old 10-07-2013   #16
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Default Re: another day, another code...

Quote:
Originally Posted by GOLDCYLON View Post
Kevin this would give you a lot of piece of mind and is simple as wire and a PROM. Even if you decide to sell your car this is a selling point as you will eliminate a reason to pull the plenum in the future for a secondary vaccum issue. its also not permament and can be return to stock by simply pulling the wires and putting the stock chip back in. GC

Good point, GC
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Old 10-07-2013   #17
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Default Re: another day, another code...

Vac leaks aren't usually intermittent, are they???

I was wondering right after I got mine last year, if some circuit that's energized in Closed Loop might make such a thing happen, but no one has offered up any confirmation...
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Old 10-07-2013   #18
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Default Re: another day, another code...

Quote:
Originally Posted by Blue Flame Restorations View Post
Good point, GC

I know his frustration a lot of us have been there. Hell my butterflies screws fell into my motor and hosed two valves and a piston.

Felt the same way after replaced my third used cat. Went to headers and High Flow Magna flows cats. There is a time you just do what you need to do.
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91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat

90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat

11 RED/GREY CTS-V

Last edited by GOLDCYLON; 10-07-2013 at 09:48 PM.
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Old 10-07-2013   #19
Kevin
 
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Default Re: another day, another code...

Quote:
Originally Posted by Schrade View Post
Vac leaks aren't usually intermittent, are they???

I was wondering right after I got mine last year, if some circuit that's energized in Closed Loop might make such a thing happen, but no one has offered up any confirmation...
my understanding is that the engine produces enough vacuum to keep the secondaries running under WOT and it's only when you start playing around at part, or full throttle in a high gear and low RPM that you need the extra vacuum to keep thing running. either way this requires pulling the plenum which I'm not comfortable doing.
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Old 10-07-2013   #20
XfireZ51
 
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Default Re: another day, another code...

I used tie-wraps on the actuators. Since you're pulling the plenum anyway...
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