EFI wiring / sensors

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EFI wiring / sensors

Postby Sigmaproject » Tue Oct 22, 2013 11:58 am

So this is the wiring diagram I am putting all of my faith in. I forget who put it up , but it looks so simple.

Only problem I seem to have with it is that the only sensor included in the diagram is the coolant sensor. What about the umpteen other sensors.??

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Re: EFI wiring / sensors

Postby A112H » Tue Oct 22, 2013 1:21 pm

Only sensors I am running is the coolant and throttle position as far as I remember. If you are running A/C or P/S you will need the idle up and maybe a vacuum sensor, mine has neither so I am not sure.
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Re: EFI wiring / sensors

Postby Cottees » Tue Oct 22, 2013 11:02 pm

Sigmaproject wrote:I forget who put it up , but it looks so simple.

It was me, and it is simple. That diagram only shows what was modified to connect the Sigma loom to the TR/TS magna engine loom. The rest of the wires from the ECU are as standard. For more in-depth about it, check out my GN build thread, link in my signature.
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Re: EFI wiring / sensors

Postby Sigmaproject » Tue Oct 29, 2013 12:13 pm

While we are on the subject. I have two ECU's They have different part numbers.

AW335189 is definitely from an Auto (could have been a TS. It had an additional bracket on the inlet for a plug leading to a knock sensor. Not sure if the TR had this)

AW319647 This one is from a TR manual

I have read differing opinions with regards to running an auto ECU in a manual car. Some say it doesnt matter...some say it does.
Last edited by Sigmaproject on Tue Oct 29, 2013 6:17 pm, edited 1 time in total.
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Re: EFI wiring / sensors

Postby A112H » Tue Oct 29, 2013 12:15 pm

If running an auto ecu there is an extra wire that needs to be grounded. Can't remember for the life of me which one though, lol
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Re: EFI wiring / sensors

Postby simon » Tue Oct 29, 2013 3:46 pm

the TR ecu you got off me is for a manual
regards Simon
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Re: EFI wiring / sensors

Postby GB_BB4C » Tue Oct 29, 2013 3:54 pm

Sigmaproject wrote:While we are on the subject. I have two ECU's They have different part numbers.

AW335189 is definitely from an Auto (could have been a TS. It had an additional bracket on the inlet for a plug leading to a knock sensor. Not sure if the TR had this)
AW319647 I am not sure about.

I have read differing opinions with regards to running an auto ECU in a manual car. Some say it doesnt matter...some say it does.



It shouldn't matter what the computer was from, just so long as the wiring is correct for the application. As Jason (A112H) said, one of the wires is either grounded or goes off to the neutral safety inhibitor switch depending n if you have an Auto of Manual you are running in the car.
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Re: EFI wiring / sensors

Postby Sigmaproject » Tue Oct 29, 2013 6:16 pm

simon wrote:the TR ecu you got off me is for a manual
regards Simon


OK thanks, I will edit the post regarding the ECU's
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Re: EFI wiring / sensors

Postby Cottees » Tue Oct 29, 2013 10:57 pm

I have set mine up for a TR/TS manual, and either ECU worked. Better to be safe and set it up for manual, and use a manual ECU etc.
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Re: EFI wiring / sensors

Postby Sigmaproject » Sun Dec 15, 2013 8:37 am

Can anyone tell me what this gizmo is.. Looks like a vacuum operated switch, the wiring comes from the ECU, through this switch ,then disappears into the main injector/sensors part of the wiring loom :\

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I was hoping to leave that part of the wiring loom intact, because I could not see any point of pulling it apart.
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Re: EFI wiring / sensors

Postby C_Fernance » Sun Dec 15, 2013 8:42 am

I'm not 100% on it, but from playing around with TN and TP Magnas in the past I do know that the vacuum lines for the charcoal cannister are connected to a switch like this, which is then controlled buy the ecu.
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Re: EFI wiring / sensors

Postby Sigmaproject » Sun Dec 15, 2013 12:45 pm

Thanks Chris..I just went on ebay and bought a TR workshop manual on CD. I have a TP Gregory's, but it's not much help..

Welcome to my nightmare !!!! Actually a Haltech 500 is looking like a likely purchase. Even though there is no-one in my area to tune the thing :\

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Re: EFI wiring / sensors

Postby barana » Fri Apr 18, 2014 11:12 am

confirmed, it s ecu control of carbon canister purge. for brevity i just went back to vacuum control of purge.... and because i lost the said ecu contrlled solonoid.:)
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Re: EFI wiring / sensors

Postby Cottees » Fri Apr 18, 2014 1:52 pm

Sigmaproject wrote:Image

Yep, it is a purge valve. One side goes into the charcoal canister, the other into the throttle body. It opens up when the throttle opens up to burn excess petrol vapour.
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Re: EFI wiring / sensors

Postby barana » Fri Apr 18, 2014 2:34 pm

i thought it switched on when the engine runs to intake the stored vapour from the carbon canister that was built up from expansion of the fueltank due to temp or fill up... and switched off when the engine is.
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EFI wiring / sensors

Postby TroyaTUM » Sun Nov 08, 2015 5:04 am

im looking to wire up a two step and data logger switch on the holley hp efi system.


looking for the easiest way to do it. Gonna be running a transbrake.


dont understand the wiring fully so a diagram helping me would be nice.


thanks to anyone that can help.
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