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Old 04-22-2010, 08:25 AM   #41
pattywaggon
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Quote:
Originally Posted by mcrcracer View Post
I didnt buy an AEM one, I was told I could splice into the O2 sensor. Would I unhook it from the car and just have it going to the AFR gauge? If so, wouldnt that make the check engine light come on?
If your getting a wideband im gonna asume your going to get it tuned, have the guy tune the cel off. like have him turn off the rear o2 you should pass inspection since there is an o2 sensor and such.

Just buy the aem for like 175$ on ebay and its a plug and play like it was stated above.

I got an auto meter air/fuel and it costed me 150$ brand new off craiglist
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Old 04-22-2010, 12:25 PM   #42
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AutoMeter

I have an Auto Meter A/F meter. I did this mod and come to find out thier is no autometer selection on the SCT has anybody else used and autometer to do this and what selection did you use?
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Old 04-22-2010, 04:58 PM   #43
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Try some of the calculations that are already there like the AEM , then change the equation if its close manualy

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Old 05-11-2010, 09:49 PM   #44
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When I strip the Firewire, I find that the wires corresponding with pins 1 & 2 are very fine (of the six wires, 4 are very fine and 2 a little thicker).

Does everyone else find that? The one in the photo appears much thicker
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Old 05-11-2010, 10:11 PM   #45
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Two wires (the black and white ones) may be a bit thicker because they are the USB power and ground wires. The other four are the signal wires. When you're stripping the signal wire, make sure you don't accidentally strip off wiring with the plastic insulation; it's easy to do.

To answer your question, it's normal.
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Old 05-11-2010, 11:53 PM   #46
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Great. Thanks for that.

I'm sure I stripped a bit of wiring the first few times, so have got myself a GOOD wire stripper to make sure I do the job properly
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Old 06-19-2010, 11:46 AM   #47
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Can we make this a sticky ?

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Old 07-13-2010, 05:45 AM   #48
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Quote:
Originally Posted by BC_ZX3 View Post
I just finished doing this and had the same questions. Hope this helps.

Purchase a firewire cable available at most computer stores. Both ends should be identical.



Cut off one end near the connector and strip away and expose the inner wires. There will be six.



Here's the part that gives the most difficulty. Each coloured wire corresponds to a small brass pin in the other connector end. We need to determine which pin position corresponds to each wire colour. There are a couple of different colour schemes used depending on who makes the cable.



Make yourself a diagram.



Strip each wire end and then get out the handy multimeter and map each pin to its colour like so.



The result is something like that shown below. We can pick either of the two colours - in this case, red or yellow - that correspond to the firewire pins the SCT scanner uses for analog inputs. Red is Channel 2; yellow is Channel 1. We only need a single channel.



I chose red which corresponds with analog input Channel 2. Trim the other wires.



Crimp a connector on it and tape it up. You can solder it if you want; just make sure it's secure.




Now connect it to your AEM gauge harness. Use the white wire (to which I've already crimped a female connector).



Connect the rest of your wiring as shown here to power the AFR gauge. The interior fusebox is your best 12V power source and the unpainted metal fusebox housing can act as your ground. Put proper connectors on the exposed wire ends. You probably want a fusible link on the 12V power source.



Fit the unmodified Firewire cable end of your butchered Firewire cable into SCT scanner (at the top), the large SCT scanner cable end into the OBD II port of the car and a USB cable from the SCT scanner to your notebook computer, if you're using one to datalog.



When preparing to data log, go to "Data Logging" then "Set Up" in the SCT scanner menu and configure scanner analog inputs, when prompted i.e. "Configure Analog Inputs? Y/N" will appear on the screen. Select Channel 2 (or 1 depending on the wire you chose) and specify "Wideband" and then "AEM" from the scrollable list presented. This will apply a formula to the raw voltage generated by the sensor located in the exhaust stream and convert it into a more recognizable AFR ratio - the same as the in dash gauge will display - in the resulting logs.

You can datalog to the scanner itself or to the notebook using the Livelink software package.

When you've finished with the SCT data logging, simply disconnect the white analog input wire and cap it. Tie it up near the OBDII port out of sight until it's needed. Store your Firewire cable in a safe place ready for future use.

This set up worked for me without problem. Let me know if I've made any errors and I'll fix 'em.


when i get the connectors, what is the name of the connector for the ground connector to the fuse box? and how do you set up the 12v fuseable link?
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Old 08-15-2010, 11:08 AM   #49
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does someone have one of these to sell me or could someone make me one? let me know
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Old 09-01-2010, 09:49 PM   #50
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^^I should be doing a new one tmrw! I just bought a brand new FireWire and it's a 6' cable! I could make 2(has 2 ends) and we could work something out!
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