4.7 zener diodes - Ford Powerstroke Diesel Forum
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Old 03-21-2009, 04:23 AM
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4.7 zener diodes

ok if i run one of these diodes will my boost gauge still work right mine gets its singal from the map i know if you run the DIY Boost Fooler it will show less boost and not be what the real boost is
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Old 03-21-2009, 04:29 AM
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You will be fine. The only reason with a boost fooler you would not see true boost if if you hook it up after the fooler. The diode fools the PCM not the turbo.
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Old 03-21-2009, 04:41 AM
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You will see full boost. You got anymore of them diodes?
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Old 03-21-2009, 08:33 PM
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well does anybody have these on here i need one money in hand or paypal
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Old 03-21-2009, 08:35 PM
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Oh, I thought you had some! My bad!
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Old 03-21-2009, 08:55 PM
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i hate the resistor mods.. Made me blow a hpop o ring. Im assuming you are talking about the ones you plug in to fool the hpop to pump more oil and get a little more smoke right? Your a big fan of those arent you ryan?
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Old 03-22-2009, 10:15 AM
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My local electronics store stocks these diodes.
I think theyre .45 cents
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Old 03-25-2009, 08:43 PM
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Quote:
Originally Posted by Austinj427 View Post
i hate the resistor mods.. Made me blow a hpop o ring. Im assuming you are talking about the ones you plug in to fool the hpop to pump more oil and get a little more smoke right? Your a big fan of those arent you ryan?
No, thats the 10k mod. This a 4.7v Zener diode on the MAP sensor to work as a boost fooler.
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Old 03-26-2009, 06:06 AM
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If I read the original post correctly you have an electronic Boost gauge that reads from the map sensor. So in that case a mechanical fooler will cause it to read low AND the Zener will also cause the gauge to freeze at 4.7v even though your actual boost will be going higher. Only way I can see around that is to either install a mechanical gauge or a second map sensor.
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Old 03-26-2009, 07:05 AM
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Quote:
Originally Posted by alabamafrog View Post
If I read the original post correctly you have an electronic Boost gauge that reads from the map sensor. So in that case a mechanical fooler will cause it to read low AND the Zener will also cause the gauge to freeze at 4.7v even though your actual boost will be going higher. Only way I can see around that is to either install a mechanical gauge or a second map sensor.

^^^ what he said. You are limiting the sensor from reading anything above 4.7v which translates to about 16psi. This keeps the PCM from defueling. It will also keep your gauge from reading anything above 16psi, since you are reading the same signal. You'll need a mechanical gauge to read properly.
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