Stock guages with DFI or carb? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 15 Old 04-17-2009, 09:02 AM Thread Starter
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Stock guages with DFI or carb?

I am installing my DFI and wondering if anyone knows easy ways to get the oil and temp guages to work. I think I can figure the tach out but I would like a short cut if anyone knows.

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post #2 of 15 Old 04-18-2009, 11:59 PM
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DFI doesn't have anything to do with the oil or temp gauge....
Its got its own temp sensor, and doesn't care about oil pressure.


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post #3 of 15 Old 04-19-2009, 11:32 AM Thread Starter
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You missed the question. I have removed the stock harness and stock computor. All the wiring for the temp and oil run in the stock ECU harness.
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post #4 of 15 Old 04-19-2009, 11:41 AM
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http://www.veryuseful.com/mustang/te...nt-Cluster.gif

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post #5 of 15 Old 04-19-2009, 12:19 PM
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how would anyone know, help us help you by telling us what you're working on.

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post #6 of 15 Old 04-19-2009, 12:28 PM Thread Starter
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how would anyone know, help us help you by telling us what you're working on.
lol I thought it was common knowledge that the only good mustangs were 87-93's. Sorry, I took it for granted that everyone has read my on 3 install thread.

Thanks XJ this will help. I wonder if these gauges or 5 volt refrence or 12?
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post #7 of 15 Old 04-19-2009, 12:37 PM
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If you power up the cluster all sensors provide a resistance signal through sensor to ground. So they are 12 volts. Only sensors that are 5volts are the ones powered by the ecu. At least that is my understanding.

ps. 94-95 are the best ones..

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post #8 of 15 Old 04-19-2009, 12:40 PM
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Actually, if its an 87-93, then the gauges on the cluster are not run by the EEC.
Oil pressure is red with a white stripe, coolant is red with a blue stripe...

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post #9 of 15 Old 04-19-2009, 03:16 PM Thread Starter
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Actually, if its an 87-93, then the gauges on the cluster are not run by the EEC.
Oil pressure is red with a white stripe, coolant is red with a blue stripe...
They are in the ECU harness I removed.
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post #10 of 15 Old 04-19-2009, 03:28 PM
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They are routed through the underhood/EEC harness. No you've got 2 open ends, one on the gauge and one on the sender, fill in the blank in the middle and they'll work.
The EEC doesn't care if you have oil pressure or not, therefore its not critical to the function for the EEC. Coolant has another sensor, one for the EEC and one for the gauge.
What year is the car? You need an ETVM....The listed website has a ton of info, and was very good for resources when I did mine, and the next, and the next...I've done quite a few cars and go through the same sequence every time...


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post #11 of 15 Old 04-19-2009, 04:21 PM Thread Starter
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I got it all figured out. It was so simple a cave man could do it. I never had looked at it before. I thought the sensors also ran through the ECU before they got to the gauges. Cool to have them all working now. Thanks for the help.
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post #12 of 15 Old 04-19-2009, 08:32 PM
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So what your saying is that when I go to install my FAST system in my 1991 that I can just run wire from the sensor to the dash and it will work fine?
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post #13 of 15 Old 04-19-2009, 08:49 PM
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So what your saying is that when I go to install my FAST system in my 1991 that I can just run wire from the sensor to the dash and it will work fine?
For the dash guages yes.

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post #14 of 15 Old 04-19-2009, 10:02 PM
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See, and I bet that before you looked at it, and read my post you thought I was giving you sh*t....
Not really though, its that easy...

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post #15 of 15 Old 04-20-2009, 09:06 AM Thread Starter
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So what your saying is that when I go to install my FAST system in my 1991 that I can just run wire from the sensor to the dash and it will work fine?
No, it is easier than that. On the two plugs by between the wiper and strut tower, on the black connecter, the temp and oil are right there. Just two wires. Red/white and white/red. There was a green/yellow in the grey connnector that works the tach. I can't believe it was this simple. I remember installing my first DFI years ago and hating to add gauges. I can't believe I missed this. It is a cool deal.
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