Jumper to avoid being stranded with a failed Primary Fuel Pump - Page 3 - ZR-1 Net Registry Forums

PhillipsLT5 · 05-27-2015

Quote:

Originally Posted by GOLDCYLON

Ive talked to my local electrical guy about making these. We figure $30 shipped Lower 48. I have asked him about making a run of 20 if we have enough interest. Once we have ten signed up I will tell him to start making them and start ordering the connectors and wire and post up the prototype

1. GOLDCYLON
2. PHILLIPSLT5 (Assumed)

I am in, no need to ship, just a cold 1

GOLDCYLON · 05-27-2015

Ok any others out there ?

geezer · 05-27-2015

I'm in-- with additional cost to ship to Canada.

ZR1North · 05-27-2015

I am in as well.

GSJoe · 05-27-2015

Quote:

Originally Posted by GOLDCYLON

Ok any others out there ?

Joe Rose (GS Joe)...I'll need two, one for me and one for my godson, Clint Morgan. Where and when do I send money?

chriskinzel · 05-27-2015

I'm in. Never needed one before, hope to never use the one. But...

Dynomite · 05-28-2015

Quote:

Originally Posted by GOLDCYLON

Ive talked to my local electrical guy about making these. We figure $30 shipped Lower 48. I have asked him about making a run of 20 if we have enough interest. Once we have ten signed up I will tell him to start making them and start ordering the connectors and wire and post up the prototype

1. GOLDCYLON
2. PHILLIPSLT5 (Assumed)

How long is the jumper you are making and I assume it plugs right in to each each end of the disconnected existing plug shown below?

What is the shortest jumper you can make? It would appear that the shortest jumper would be with two new connectors back to back with just enough room to cross wires green and gray (white).

cvette98pacecar · 05-28-2015

Count me in for 2.

WVZR-1 · 05-28-2015

I would think you would want sufficient length between connectors to maybe pass the four wires through a "heat-shrink" tube when constructing and then shrinking to keep the bundle secure. Wouldn't need to be long but I believe needs to have some length to avoid struggling when connecting.

I'd think Jim has first-hand knowledge of a practical length and I'd certainly inquire/enlist his help before constructing.

Cliff - did you check the "clocking" of the black and green/white on yours?

Dynomite · 05-28-2015

Quote:

Originally Posted by WVZR-1

I would think you would want sufficient length between connectors to maybe pass the four wires through a "heat-shrink" tube when constructing and then shrinking to keep the bundle secure. Wouldn't need to be long but I believe needs to have some length to avoid struggling when connecting.

I'd think Jim has first-hand knowledge of a practical length and I'd certainly inquire/enlist his help before constructing.

Cliff - did you check the "clocking" of the black and green/white on yours?

Good suggestions and what I was thinking also in terms of installation without having too long a jumper to try and stuff back into position under the rubber boot

I am going with what Jim described as follows.......and I am assuming 90's and 91's are identical.

Quote:

Originally Posted by QB93Z

A - Black - DC Ground
B - Purple - Fuel gauge signal
C - Gray - Fuel Pump
D - Green/white - Fuel Pump
Jim

Black is Black,
Purple I call Red,
Gray I call White,
Green/white I call Green.

Quote:

Originally Posted by QB93Z

Background: If number 1 fuel pump fails, the LT5 will start properly but then die after a short period of time. When the engine is cold, the period may be almost a minute. When the engine is at operating temperature the engine will die immediately after starting.

This happens because the ECM energizes BOTH fuel pumps on engine start. So the Secondary Fuel Pump supplies fuel to the injectors while the primary pump does nothing. Once the engine is operating properly, the ECM turns off the Secondary Fuel Pump and the car stalls.

Why does the ECM have to energize BOTH fuel pumps on starting?

Quote:

Originally Posted by GOLDCYLON

Ok any others out there ?

Four Jumpers for Dynomite.......

05-27-2015	#22
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: Jumper to avoid being stranded with a failed Primary Fuel Pump Ok any others out there ? __________________ 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

05-27-2015	#23
geezer Join Date: Aug 2010 Location: ottawa canada Posts: 156	Re: Jumper to avoid being stranded with a failed Primary Fuel Pump I'm in-- with additional cost to ship to Canada.

05-27-2015	#24
ZR1North Join Date: Feb 2007 Location: Komoka, Ontario, Canada Posts: 588	Re: Jumper to avoid being stranded with a failed Primary Fuel Pump I am in as well.

05-27-2015	#26
chriskinzel Join Date: Nov 2011 Location: Salt Lake City, Utah Posts: 169	Re: Jumper to avoid being stranded with a failed Primary Fuel Pump I'm in. Never needed one before, hope to never use the one. But... __________________ 91 ZR-1 Red on Red #922

05-28-2015	#28
cvette98pacecar Join Date: May 2011 Location: Sydney, Australia Posts: 2,479	Re: Jumper to avoid being stranded with a failed Primary Fuel Pump Count me in for 2. __________________ Robert J. DeMarco [SIGPIC][/SIGPIC] [COLOR=blue]G[/COLOR][COLOR=red]rand[/COLOR] [COLOR=blue]S[/COLOR][COLOR=red]port[/COLOR] Registry Lifetime Member NCM Lifetime Member #2655 Pacecar Registry Member [COLOR=red]ZOOM Charter Member - ZR-1 Owners of Michigan[/COLOR] [COLOR=plum][I]ZR-1[/I] Registry member since 2012 [/COLOR] [COLOR=black]1990 LPE "368" Aerobody ZR-1, Last ZR-1 built by John[/COLOR] 1991 Callaway Aerobody ZR-1, DRM 500 1991 Shinoda Aerobody Spyder, 1998 Pace Car

05-28-2015	#29
WVZR-1 Join Date: Oct 2004 Posts: 1,890	Re: Jumper to avoid being stranded with a failed Primary Fuel Pump I would think you would want sufficient length between connectors to maybe pass the four wires through a "heat-shrink" tube when constructing and then shrinking to keep the bundle secure. Wouldn't need to be long but I believe needs to have some length to avoid struggling when connecting. I'd think Jim has first-hand knowledge of a practical length and I'd certainly inquire/enlist his help before constructing. Cliff - did you check the "clocking" of the black and green/white on yours?

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