Brandon Mathis

Hey guys so This is my first lsx swap so Kinda lost on what to do with gauges. As the title says im running holley EFI. I was wondering could the stock foxbody gauges work and how? Ive seen plenty of post of guys using the stock ls pcm but not a aftermarket pcm like mine. thanks and any help would be appreciated.

Project GatTagO

iTrader: (7)

What year Mustang?

The Holley has a Tach out, which should connect directly to the stock tach. If you have a cable speedo, that has to be worked out based on the transmission you choose. Fuel level doesn't change.

Andrew

Gray86hatch

iTrader: (83)

Tach should not be a problem. Oil pressure no problem. Fuel yep volt yep. Temp you will have to add a sending unit to the water pump somewhere to get you temp. Speed depends on what trans you are using. If it has a cable it is no problem

Tim

93Z2871805

iTrader: (5)

Like said above, tach, volts, and fuel are no issue. Water temp and oil pressure and/or temp will require their own dedicated senders as you can't split the signal from the ones plugged into the Holley harness. Water temp is easy, you can just run a sender from the port on the other head or tap the water pump. Oil temp can be a sender in the pan (if you're not using the oil level sender on the side of the pan, you can get a fitting to replace it for a gauge sender). The oil pressure sender can either be teed from the stock OPSU at the back of the block behind the manifold, or tapped into the cooler block off plate above the oil filter.