what exactly does a missing link or check valve do?

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Old Dec 21, 2002 | 08:36 AM
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wickedxboi's Avatar
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From: tx
Default what exactly does a missing link or check valve do?

i did a search and nothing really came up. i was wondering if i will need either one. i have a 99 b18b with a drag 3 kit. i want to use a fmu set up for now until the smc comes out. what does it exactly do and is it nessecary? any info would help..thanks
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Old Dec 21, 2002 | 09:41 AM
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Default Re: what exactly does a missing link or check valve do? (wickedxboi)

it tricks the MAF sensor basically. if that sees too much boost you will have a CEL
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Old Dec 21, 2002 | 09:24 PM
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Default Re: what exactly does a missing link or check valve do? (rookie2nr)

does anyone how much boost before i throw a cel?
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Old Dec 21, 2002 | 10:16 PM
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Default Re: what exactly does a missing link or check valve do? (wickedxboi)

Stock Honda ECU's expect to see a maximum manifold pressure of atmospheric. (0 psi on your boost guage) If it sees any boost at all, it should throw a CEL. The Drag kit probably came with check valves to prevent this.

Tyler
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Old Dec 21, 2002 | 11:17 PM
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Default Re: what exactly does a missing link or check valve do? (Tyler H)

yeah, basically once it reads positive vacuum (boost) and not negative vacuum, you will get a light (cel)
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Old Dec 21, 2002 | 11:32 PM
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Default Re: what exactly does a missing link or check valve do? (SIXTYdashONE)

does the cel affect performance? doesnt it go to loop mode or something?
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Old Dec 21, 2002 | 11:38 PM
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Default Re: what exactly does a missing link or check valve do? (wickedxboi)

yeah. your going to need this. i have a throttle body mount missing link. forty bucks shipped and it's all yours.
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Old Dec 24, 2002 | 04:45 PM
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Default Re: what exactly does a missing link or check valve do? (not so civic)

people are telling me 12:1 is over kill and to use a 10:1 disk and a intank.....will this work well on stock injectors?
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Old Dec 24, 2002 | 04:49 PM
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Default Re: what exactly does a missing link or check valve do? (wickedxboi)

I use 10:1, Walbro Intank, and 440cc injectors and run 1 bar. Works perfect
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Old Dec 24, 2002 | 06:42 PM
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Default Re: what exactly does a missing link or check valve do? (wickedxboi)

what's the max amount of boost that can be obtained using the missing link.
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