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-   MEGAsquirt (https://www.miataturbo.net/megasquirt-18/)
-   -   MS and Fuel Pump wiring (inside cabin) (https://www.miataturbo.net/megasquirt-18/ms-fuel-pump-wiring-inside-cabin-11214/)

Saml01 07-23-2007 12:35 PM

Is this procedure required on cars of all years or only the earlier ones?

Matt Cramer 07-23-2007 12:50 PM

In the US, only the '93 and earlier cars run the fuel pump wiring through the AFM. Later ones have the ECU control it directly.

reddroptop 07-23-2007 02:57 PM


Originally Posted by Matt Cramer (Post 133655)
In the US, only the '93 and earlier cars run the fuel pump wiring through the AFM. Later ones have the ECU control it directly.

Yep. My fuel pump for my 94 is controlled through the megasquirt, PNP.

Saml01 07-23-2007 03:03 PM


Originally Posted by reddroptop (Post 133697)
Yep. My fuel pump for my 94 is controlled through the megasquirt, PNP.

Sweet, one less thing to worry about.

Splitime 03-18-2008 02:13 PM


Originally Posted by Splitime (Post 131107)
If someone already covered this with pictures... just kill this thread. Or if I've missed an easier way to do this... kill it... or repost that info for people.

So.. I know we've talked about the fuel pump wiring being accessible under the dash... it is... and very easily. No need to run outside to the diagnostics stuff... or jumper that fulltime for your fuel pump.

Just run one wire from the MS harness over to the driver side kick panel... its all there... here are the pictures that "guide" you to the wire.

The wire is light green.
So... start by heading for the hood latch area.
http://www.we-todd-did-racing.com/th...underdash1.jpg
Now lower your head to the floor... and start peering directly behind the hood release area.
http://www.we-todd-did-racing.com/th...underdash2.jpg
Back there there is one plug you want....
http://www.we-todd-did-racing.com/th...ser%20view.jpg
Close up of it

http://www.we-todd-did-racing.com/th...est%20view.jpg

Simply tap that wire for the fuel pump control out of the MS. Works fine... you'll get prime on initial "ON" position and then fuel pump while on. At least... I know mine primes and shuts off before cranking.

Quoted and updated picture links


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