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

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- - Jumper to avoid being stranded with a failed Primary Fuel Pump (http://zr1.net/forum/showthread.php?t=25149)

Re: Jumper to avoid being stranded with a failed Primary Fuel Pump

Quote:

Originally Posted by GOLDCYLON (Post 226515)

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

Re: Jumper to avoid being stranded with a failed Primary Fuel Pump

Ok any others out there ?

Re: Jumper to avoid being stranded with a failed Primary Fuel Pump

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

Re: Jumper to avoid being stranded with a failed Primary Fuel Pump

Quote:

Originally Posted by GOLDCYLON (Post 226531)

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?

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...

Re: Jumper to avoid being stranded with a failed Primary Fuel Pump

Quote:

Originally Posted by GOLDCYLON (Post 226515)

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).

http://i287.photobucket.com/albums/l...d99bb9e88b.jpg

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?

Re: Jumper to avoid being stranded with a failed Primary Fuel Pump

Quote:

Originally Posted by WVZR-1 (Post 226561)

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 :handshak:

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 (Post 226478)

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.
http://i287.photobucket.com/albums/l...d99bb9e88b.jpg

Quote:

Originally Posted by QB93Z (Post 226393)

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 (Post 226531)

Ok any others out there ?

Four Jumpers for Dynomite.......;)