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Vacuum lines and gauge install Help to Newbs

 
Old 02-13-2013, 12:03 PM
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Originally Posted by JoshuaGrooms83 View Post
ok cool thanks! yeah im trying to get a clear picture on the bR fuel pressure regulator.
what i dont get is, you set it on vacuum and then run it that way when you dont hook up the boost reference line...
what im not understanding is if you set it this way at sya 60 psi in vacuum... how does it drop? the aeromotive br-fpr is suppose to keep the pressure constant unless its boost referenced then it gets 1:1 boost to fuel psi. just wondering if im just not understanding or is everyone regurgitating another internet myth?
I forget some of the specifics, but its basically something like depending on engine vacuum the injector will see a particular pressure across it because you have pressure on 1 end (i.e. fuel rail pressure) and vacuum on the other end (i.e. intake manifold vacuum). So when you reference the FPR then when the engine is in vacuum it will lower fuel pressure to keep the ratio constant, where if you do not, then fuel pressure will remain constant, but the vacuum side of the injector will vary.
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Old 02-13-2013, 02:37 PM
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ok, so then i reference it from????...... lol
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Old 02-13-2013, 05:02 PM
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Originally Posted by JoshuaGrooms83 View Post
ok, so then i reference it from????...... lol
Brake booster is fine.
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Old 02-13-2013, 06:44 PM
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lol ok, just making sure. so as long as i set it with out the boost reference line on right?
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Old 02-13-2013, 08:05 PM
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Originally Posted by JoshuaGrooms83 View Post
lol ok, just making sure. so as long as i set it with out the boost reference line on right?
I would set it with the car off....I.e. just turning the key to prime the rail until your pressure is set.
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Old 03-03-2013, 08:02 PM
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thought it add a pic or two of where to drill from the inside of the cabin lol

when drilling that square bulkhead wire plug connection is a good place to reference where to drill. shouldnt need that big of a drill bit to make this hole about an inch above the connector
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and you come out right here.
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keeping it as clean and stock as possible
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kinda keeped the vacuum manifold out of sight
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the other ports in the manifold will have a BOV and wastegate refernced from it when i get to that point
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Old 03-04-2013, 06:31 AM
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Nice job throwing some pictures up. I was too lazy to tear apart under my dash since I have terminal blocks with all of my gauge wiring mounted down there lol.
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Old 03-28-2015, 07:03 PM
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Post Question for power to aftermarket gauges.

I just hooked up a mechanical oil pressure gauge, and a vacuum gauge in my 1997 Trans Am WS6. I take it that once you connect the positive wires to the fuse box, the gauges will draw continuous power until disconnected? I was testing my wiring job and they light up, but it would be nice to get them to turn on to when the ignition switch is turned on.
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Old 03-29-2015, 08:20 AM
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That is actually rather easy. You can either splice into a power wire that is only hit when the ignition is on, or yout can do it using a relay.
Originally Posted by Phoenix'97 View Post
I just hooked up a mechanical oil pressure gauge, and a vacuum gauge in my 1997 Trans Am WS6. I take it that once you connect the positive wires to the fuse box, the gauges will draw continuous power until disconnected? I was testing my wiring job and they light up, but it would be nice to get them to turn on to when the ignition switch is turned on.
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Old 03-29-2015, 07:45 PM
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Originally Posted by ddnspider View Post
That is actually rather easy. You can either splice into a power wire that is only hit when the ignition is on, or yout can do it using a relay.

I figured. This is my first time hooking up aftermarket gauges. I have my positives set up to run off the fuses in my fuse box, put I would prefer something more professional. Would tapping into my headlight switch work?

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Old 03-30-2015, 06:54 AM
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Originally Posted by Phoenix'97 View Post

I figured. This is my first time hooking up aftermarket gauges. I have my positives set up to run off the fuses in my fuse box, put I would prefer something more professional. Would tapping into my headlight switch work?

Is the headlight switch hot on ignition? There are plenty of accessory or spare 12V lines that are hot on ignition only.
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Old 03-30-2015, 07:58 PM
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Originally Posted by ddnspider View Post
Is the headlight switch hot on ignition? There are plenty of accessory or spare 12V lines that are hot on ignition only.

I was going to ask, I was thinking about tapping into the yellow power wire to activate the headlights, as I only need the gauges glowing at night or when the headlights are turned on. That is of course if I am reading an electrical diagram correctly...

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Old 04-02-2015, 10:48 AM
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Originally Posted by Phoenix'97 View Post

I was going to ask, I was thinking about tapping into the yellow power wire to activate the headlights, as I only need the gauges glowing at night or when the headlights are turned on. That is of course if I am reading an electrical diagram correctly...

Sounds reasonable. Post a pic of the wiring diagram and I can verify.
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Old 04-02-2015, 03:37 PM
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Originally Posted by ddnspider View Post
Sounds reasonable. Post a pic of the wiring diagram and I can verify.

Here is the diagram.

Attached Thumbnails Vacuum lines and gauge install Help to Newbs-headlight_chevy_1995.jpg  
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Old 04-02-2015, 05:19 PM
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That sounds reasonable if you only want them on or glowing when the headlights are up. Most people do it on ignition hot so they glow constantly as long as the car is running. Just note that if you're sitting in the car with the key on but the headlights off the gauges wont illuminate.
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Old 04-02-2015, 10:19 PM
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Originally Posted by ddnspider View Post
That sounds reasonable if you only want them on or glowing when the headlights are up. Most people do it on ignition hot so they glow constantly as long as the car is running. Just note that if you're sitting in the car with the key on but the headlights off the gauges wont illuminate.


Well, when I sit in my car at night with the key in the ignition and the exterior lights turned off, my gauges are not lit, short of my odometer and radio screen. Okay, so this weekend I am splicing into the headlight switch wire. I am getting sick of using my fuse box as a temporary means, I want these pods to appear professionally installed--by me. Thanks again for your input.
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Old 04-08-2015, 11:27 AM
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In the process of trying to splice my positive gauge wires into the headlight wire from the switch, I found it too difficult to try to trace the yellow headlight wire throughout the dash panel interior. Fortunately through a cut out where the hatch back unlock button sits, I was able to trace the brown running light wire directly from the switch. After routing my butt connected gauge wires behind the fuse box, I was able to splice them into the brown wire.

Now my gauges light up when the running light is turned on, which is fine. An additional benefit is when my factory alarm is activated. The gauges light up in tune with my gauge cluster lights, interior lights, and exterior lights after locking my door and shutting it. My installation is now complete and quite professional now. I love it. Thanks again for your help.
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Old 04-08-2015, 02:04 PM
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Cool, glad it worked for you.
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Old 06-16-2015, 11:06 AM
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I also did a start to finish AFR Gauge/Boost Gauge install in my thread 2002 Camaro SS AC Retaining Turbo Build with pics and wire locations if any one is interested. Cheers!
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Old 04-09-2017, 04:32 PM
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Originally Posted by ddnspider View Post
As far as power sources the fuse box on the side of the dash on the driver side is a great place. With the factory “A” pillar removed you can feed the wire down to the fuse box. You can then either use the correct connectors(spade connector) to stick in an empty slot or wrap the bare wire around the fuse itself and push back into the slot with some effort. You’re going to want to use only the slots that are power on ignition only so as not to kill your battery.Most wiring diagrams will ask for an "ignition switch 12V". Such fuses are acc, radio, radio acc and so on. That should be all the power you need.
Could you walk me through how to add connectors in an empty slot and how to wire them up? I can't find any info anywhere on how it's done.
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