Ok i bought some autometer gauges and need some help on were all the wires go!..I have the Oil Pressure,Fuel Pressure(i have an aeromotive fuel pressure reg),and air-fuel....now were do i hook up the wires/hoses for each one...thanks alot


-94 lt1 camaro

 

Need more info:

For each pressure gauge, is it "mechanical" or "electronic"? Need that info to get started.

For the A/F ratio gauge, is it the old "narrow-band" gauge that hooks to your stock sensors, or their new "wide-band" controller/gauge that comes with a wide-band sensor?

 

The fuel Pressure is mechanical..idk bout the air-fuel one..thier the ultra-lite(carbon fiber background)Gauges.

 

Do NOT..... repeat DO NOT install a mechanical fuel pressure gauge in the passenger compartment. If you are talking about mounting it on the hood, go ahead. But not in the passenger compartment. As a minimum, you need a high pressure isolator mounted at the firewall, and all the tubing inside the passenger side has to be filled with glycol. The cost of the pressure isolator and braided SS lines is gling to add up to more than simply buying an electronic fuel pressure gauge. And keeping the lines full of glycol is next to impossible, resulting in inaccurate gauge readings.

I had an AutoMeter isolator fail, and allow fuel into the lines inside the passenger compartment - no thank you.

What about the oil pressure? That one can be mechanical.

 

here are some pictures of the air/fuel and oil....

Front air/fuel

Back Air/Fuel

Front Oil Pressure

Back Oil Pressure

 

That oil pressure one is mechanical.

 

i have the same ? here..... BTW cool gauges!

 

The gauges have two different electrical connections. One set of leads is for the lights. One of the wires is a ground, and can go to any chassis screw that is into metal. The +12V needs to come from a source that operates with the lights. You can tap into the panel dimmer switch at the fuse panel or under the dash. Try a "search" on "General F-Body Tech....", there was a thread about 2 months ago about installing a tranny temp gauge that ended up with good details about how to power up the lighting.

On the A/F ratio gauge, that appears to be the gauge that wires into the stock O2 sensors. As a result, it will provide very little more than a psychedlic light show when the PCM is running in closed loop, and will simply tell you the engine is running rich (as it should be) when you go WOT.

You need to splice into the wiring harness (not the O2 sensor wires) for the left or right O2 sensor. Left sensor is pin C20 on the PCM, purple/white wire. Right O2 is pin C8, purple wire. An alternative is to splice into both O2 sensor harness wires, bring the wires to a single-pin/double-throw switch, then wire the center pin on the SPDT switch to the purple wire on the gauge, allowing you to monitor either the left or right sensor. Be VERY careful with the splicing, or you will screw up the O2 sensor signals and that will cause endless problems with the A/F ratio.

On the oil pressure sensor, you need to use a tube to connect to a fitting screwed into the port in the block right above oil filter, currently plugged with a pipe plug (unless your 94 is an "early" model year car and already has the stock oil pressure sensor there). You run the tube from the fitting on the block to the gauge. I suspect the gauge came with nylon or plastic tubing. My recommendation is to use a -3AN braided S/S hose.

As far as the fuel pressure gauge, if its mechanical, you need to buy the AutoMeter high pressure isolator, or you run the risk of incenerating yourself and your passengers in an accident.

 

thanks alot for the info...iam selling the mechanical one and just order the electrical one..ill let you know if i have any other questions one i go to install them..thanks alot!!!

 

Def. loose the mechanical one.....The air fuel one I had along time ago just stayed green all the time, never moved