Temp wiring question on Injector harness

S

Slugstang

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Dec 9, 2003

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Mar 23, 2011

#1

• Mar 23, 2011

• #1

I am swapping EFI onto an older carburated mustang and I am removing all the unneeded wires from the injector harness. Along with the EGR, purge canister and oil guage I want to get rid of the temp since I am running an aftermarket guage for this. On the injector harness there are two different temperature sensors. One 1 wire plug and another 2 wire plug. I know one is for the stock guage and the other the computer uses for engine management. Which one is which?

Thanks,

 

9

90stang5speed

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Jan 19, 2009

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Columbus Ga

Mar 23, 2011

#2

• Mar 23, 2011

• #2

the 2 wire up by the T stat housing mounted in the metal tube that runs to the heater core is the one the EEC uses. make sure you keep that one. The other one on the drivers side is the one to replace with the after market sending unit

 

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Slugstang

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Mar 23, 2011

#3

• Mar 23, 2011

• #3

I don't have the coolant tubes on my intake (Spyder Crb to EFI Intake) so can I just mount that sensor in the intake near the T-Stat? I don't actually have the sensor yet to see the thread size... Just now mocking everything up...

 

9

90stang5speed

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Mar 23, 2011

#4

• Mar 23, 2011

• #4

I used a cut heater core tube to route the hhose back to the water pump. If you dont have that, you can use a reducer that is 1/2" male npt with a 3/8 female npt on the other end.

 

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Slugstang

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Mar 23, 2011

#5

• Mar 23, 2011

• #5

90stang5speed said:

I used a cut heater core tube to route the hhose back to the water pump. If you dont have that, you can use a reducer that is 1/2" male npt with a 3/8 female npt on the other end.

Click to expand...

Excellent! Thanks! I have no heater core or anything so the reducer is what I need!

 

9

90stang5speed

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Mar 23, 2011

#6

• Mar 23, 2011

• #6

what will you do with the port on the water pump? cap it or route it over to the other small port?

 

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Slugstang

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Mar 24, 2011

#7

• Mar 24, 2011

• #7

90stang5speed said:

what will you do with the port on the water pump? cap it or route it over to the other small port?

Click to expand...

It's capped!

 

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90stang5speed

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Mar 24, 2011

#8

• Mar 24, 2011

• #8

ok. good to know. I didnt know if that would cause a flow problem or not. thanks.

 

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Slugstang

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Mar 24, 2011

#9

• Mar 24, 2011

• #9

It hasn't on my car and it's been capped for over 5 years now. I've seen people pull the little tube out and put in tiny freeze plugs to block them as well. Next time I have mine off that's what i am going to do to clean up the engine more.

 

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90stang5speed

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Mar 24, 2011

#10

• Mar 24, 2011

• #10

that is a good idea. when my water pump wears out, I might go that route with the new pump too. I think i would want to use a screw in plug though.