Removing Secondary Vacuum System questions. - Page 8 - ZR-1 Net Registry Forums

Paul Workman · 12-30-2009

Quote:

Originally Posted by XfireZ51

Paul,

I wonder if it isn't better to have both injectors operating in terms of reliability?

Good question. There are a number of things that will result in the secondaries being shut off. My concern is that all the secondary 'stuff' controlling the secondary injectors is still used. If for any reason the ECM turns off the secondaries, suddenly the aggregate injector dwell time is cut in half

.

So...it shouldn't be a biggie to bypass the control and activate the secondaries or "latch" the secondary system to always be on. It will (in the case of Marc's chip) require a modification (by him) to accommodate the second injector being on at idle (Marc's chip runs only one injector at idle).

P.

VetteMed · 05-06-2010

When the secondaries are removed, does the purge solenoid (the one with the red connector) need to remain under the plenum, or can it be removed with the other solenoids?

oricale · 02-04-2012

How much is the chip required for the secondary change???

Pete · 02-05-2012

Quote:

Originally Posted by VetteMed

When the secondaries are removed, does the purge solenoid (the one with the red connector) need to remain under the plenum, or can it be removed with the other solenoids?

No,does not need to remain.
or
Yes,it can be removed.

Pete

VetteMed · 02-06-2012

Quote:

Originally Posted by oricale

How much is the chip required for the secondary change???

It's not cheap... I think I remember paying $350 or so?

GOLDCYLON · 02-06-2012

On the 91 what exactly can be removed? The spide,r the purge solenoid obvisouly the vaccum secondary actuators. Does the 91 require the underside ecm plug?

VetteMed · 02-06-2012

I am still running the purge solenoid, since I don't like a car that smells like gas on a hot day... But if you wish to remove it I don't think the ECM will care.

The sensor under the ECM just has its vacuum line unplugged/removed, the electrical connection remains.

Under the plenum, the vac storage canister, the secondary solenoid, and of course all the secondary hardware, is all removed. Vacuum pump is also removed.

sammy · 01-18-2013

corey did mine different . i have a rubber vac line from map sensor under the ecm to my vac pump . said they did thid on the bonniville car so the secondaries didnt shut down on the long bonniville runs .4 miles in think

LancePearson · 01-19-2013

Does an emissions chip retard the timing substantially?

Kevin · 01-19-2013

Quote:

Originally Posted by oricale

How much is the chip required for the secondary change???

i think it's around $250 if you have marc do it

05-06-2010	#72
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	Re: Removing Secondary Vacuum System questions. When the secondaries are removed, does the purge solenoid (the one with the red connector) need to remain under the plenum, or can it be removed with the other solenoids?

02-04-2012	#73
oricale Join Date: Oct 2011 Location: STAFFORD VA, Posts: 576	Re: Removing Secondary Vacuum System questions. How much is the chip required for the secondary change??? __________________ [B][I][COLOR=red]1990 ZR1[/COLOR][COLOR=black] [U]#00077 [COLOR=red]RED[/COLOR]/[COLOR=red]RED[/COLOR] (10Y022 PEP CAR) [/U][/COLOR][/I][/B][B][I][COLOR=red]1991 ZR1[/COLOR][COLOR=black] [U]#00517 ("Irene")[COLOR=red]WHITE[/COLOR]/[COLOR=red]RED-SOLD:cry:[/COLOR] [B][/B] [/U][/COLOR][/I][/B][B][I][COLOR=red]1992 ZR1[/COLOR][COLOR=black] [U]#00445("The Revenant")[COLOR=red][COLOR="Black"]BLACK [/COLOR][/COLOR]/[COLOR=red]RED(2016 T.O.D!) [/COLOR] [/U][/COLOR][/I][/B] [B][I][COLOR=red]2009 [COLOR=red]Z06!![COLOR=black]BLK/BLK rare Linen interior[/COLOR] 707HP!![/COLOR] [/COLOR][/I][/B] [B][I][COLOR=red]2006[/COLOR] BLK/BLK Z51 (Just SICK FAST!)SOLD)[/I][/B] [B][I]1996 BLK/BLK LT4 Grnsprt(sold...Twice!)[/I][/B] [B][I]1991 RED/REDL98(Fell off the shipping truck:([/I][/B] [B][I]1980 BLK/RED L82(Sold)[/I][/B] [B][I][B][I]1990[/I][/B] RED/BLK(sold.....In Japan)[/I][/B] [I][COLOR=black][B][I]2006[/I][/B][/COLOR][/I] [COLOR=red]Mustang GT[/COLOR] ([B][I]mach 1[/I][/B])[B](sold)[/B] [COLOR=black][B][I]1969[/I][/B][/COLOR] [COLOR=red]Mach[/COLOR] [B][I]1(sold in Japan)[/I][/B] [COLOR=black][B][I]1969[/I][/B][/COLOR] [COLOR=red]Mach[/COLOR] [B][I]1#2(sold)[/I][/B] [B][I]WAZOO Member...[/I][/B] [url]www.evolution-motorsport.com[/url] facebook/evolutionmotorsportengineering Your Local [url]www.Amsoil.com[/url] dealer/user.. Victory Loves Preparation

02-06-2012	#76
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: Removing Secondary Vacuum System questions. On the 91 what exactly can be removed? The spide,r the purge solenoid obvisouly the vaccum secondary actuators. Does the 91 require the underside ecm plug? __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 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

02-06-2012	#77
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	Re: Removing Secondary Vacuum System questions. I am still running the purge solenoid, since I don't like a car that smells like gas on a hot day... But if you wish to remove it I don't think the ECM will care. The sensor under the ECM just has its vacuum line unplugged/removed, the electrical connection remains. Under the plenum, the vac storage canister, the secondary solenoid, and of course all the secondary hardware, is all removed. Vacuum pump is also removed. __________________ 2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold)

01-18-2013	#78
sammy Join Date: Jun 2010 Location: back in lone pine Posts: 591	Re: Removing Secondary Vacuum System questions. corey did mine different . i have a rubber vac line from map sensor under the ecm to my vac pump . said they did thid on the bonniville car so the secondaries didnt shut down on the long bonniville runs .4 miles in think

01-19-2013	#79
LancePearson Join Date: Dec 2012 Location: Chester, Virginia Posts: 457	Re: Removing Secondary Vacuum System questions. Does an emissions chip retard the timing substantially?