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Link G4+

Postby nesthead » Wed, 22 Mar 2017 6:31 +0000

Hi guys,
so I know theres a few of you running the LINK ecu's here! talk to me...
I've bought a g4+ for my supercharger build.
Image

just reading through the install manual (http://www.linkecu.bg/downloads/installation/MazdaMiata.pdf) and i know i need to get an IAT sensor (Bosch 0280130085 ordered today).
but what's the story with my 1993 1.6 TPS? is that ok or do i need to do something?

2.2.1 Mazda Piston Engine ECUs
Some models supported by the Mazda MX5/Miata/GT-X G4 Plug-In ECU require additional
installation modifications. The following modifications may be required:
Fuel Pump Control – Some models have a switch fitted inside the AFM that disables the fuel
pump when the engine is drawing no air. Depending on the way the AFM is wired it may be
necessary to either bypass the AFM switch or wire a separate ECU controlled Fuel Pump Relay.
Throttle Position Sensor (TPS) – Miata/MX5 1600cc models do not have a factory fitted TPS.
A TPS should be installed and wired to the ECUs expansion connector. This is required for
functions such as acceleration enrichment, idle speed control and motor sport features.


Any advice much appreicated
Thanks
Tom
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Re: Link G4+

Postby Steve » Thu, 23 Mar 2017 5:16 +0000

Yes, they do have a TPS, little black box thingy on RHS of the intake manifold, it should have 3 wires
black/blue - GND
Red - 5v
green/white - signal

For details on the signals and when/how they are sent, see this post :
https://forum.miata.net/vb/showpost.php ... ostcount=1
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Re: Link G4+

Postby nesthead » Thu, 23 Mar 2017 6:55 +0000

Thanks Steve, I knew there had to be one... I just got worried when I read the manual and I know a few of you guys are on turbos with Links so said best to ask!

T
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Re: Link G4+

Postby Steve » Fri, 24 Mar 2017 12:19 +0000

Yep, have a link myself, I think the one you bought is a very different animal tho.
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Re: Link G4+

Postby andrew » Fri, 24 Mar 2017 9:06 +0000

Yes you need to change the tps, mine is a 93 and it has a switch type tps, I.e on/off not 0-100% sing along that you need for the link.

I modified a BMW tps but if you can get a mx5 auto throttle body it willl have the variable type you need.
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