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Old 05-10-2011, 04:17 PM
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Default Boost solenoid diode

I have a mac boost solenoid and in 3rd and 4th gear i keep on getting boost cut where could i buy the diode to fix this problem?
Old 05-10-2011, 04:25 PM
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Default Re: Boost solenoid diode

RadioShack will have em
Old 05-10-2011, 04:52 PM
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Default Re: Boost solenoid diode

Is there a special one to get or they are all the same?
Old 05-10-2011, 06:23 PM
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Default Re: Boost solenoid diode

I been it to tuning cars for a while now. what is the diode for?
Old 05-10-2011, 07:28 PM
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Default Re: Boost solenoid diode

The diode i need is a 1n4004 diode
Old 05-11-2011, 02:13 AM
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Default Re: Boost solenoid diode

The diode is for spike in voltage that can cause irratic ecu glitches but it shouldnt make it over boost in those gears. I've been running boost by gear for a few years with s300 and no diode, works just fine. maybe your intake temp corrections or duty vs pressure table need to be adjusted, or maybe its just boost creep and you need to make adjustments to the tables accordingly

Last edited by Turbo-LS; 05-11-2011 at 02:46 AM.
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