Boost Fooler resistor?
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Boost Fooler resistor?
So after i put my chip back in after a reburn, i go for a run and i hit 28 psi and then i got defueled. I was talking to someone and they said you can put a resistor in the MAP circuit to fool the pcm instead of the one that goes in MAP sensor line from the intake? As anyone else heard about this, it makes sence but i have never heard of it before.
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From: Cabot, Arkansas
It's a 4.7 volt zener diode. Install it in the center wire in the map sensor harness (green/black trace). Everything over 4.7v is shunted to ground, so no matter how much bost you make the map only reads slightly less than it's maximum.
It's far less expensive than any other means of controlling the SES light, but it seems to lag a bit, especially when ambient temps are way down, so you might still get an occasional flicker from the SES.
It's far less expensive than any other means of controlling the SES light, but it seems to lag a bit, especially when ambient temps are way down, so you might still get an occasional flicker from the SES.
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From: San Diego, CA
Are you trying to avoid installing a boost regulator like the one here: http://www.itpdiesel.com/store.php?c...on=show_detail
It is not that expensive and should solve your issue!
It is not that expensive and should solve your issue!
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John, I'm using the SPDiesel overboost eliminator. It's only $29.99 on their site, www.spdiesel.com and go to the new products page. It's a lot cheaper than the other inline MAP foolers and it works great, plus it saved me a lot of time hunting my not so large town for the right diode to make one myself. And if I did make one myself it wouldn't be this nice with plug'n play connectors and nicely covered wires. I haven't set an SES light for overboost since the installation of the overboost eliminator. Just some food for thought 
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That seems a little drastic as they want you to disable The fuse!?!?! Maybe I am mistaken???? It even talks about the competitors in case you have the 10K/18K mod or other mods which are better?? All you are trying to do is keep the CPU from seeing more than 24PSI! As long as my chip/CPU doesn't see more than about 25psi of boost, I don't see the SES code anymore.
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My buddy can get pretty much anything electronic so finding the actual electrical part wont be hard. Whats this about losing low end power though?
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From: Cabot, Arkansas
Originally Posted by John311t
Do you use this diode? Its sounds alot cheaper than the ones that go in line to the map sensor so i will probably go that route.
If money is an issue then the $1.07 zener dide is a no brainer.
Oh yeah, forgot to mention in the first post. The diode get one end soldered into the map sensor wire, the other end of the diode runs to ground.
Last edited by cookie88; Dec 10, 2006 at 10:16 PM.
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