HomemadeTurbo - DIY Turbo Forum

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-   -   check valves (https://www.homemadeturbo.com/forced-induction-7/check-valves-4403/)

dragmanEX 04-29-2003 08:28 PM

check valves
 
this may be faq but, how do you instal check valves. i have no prior fish tank or turbo experience. sounds like it has a good purpose though.

leed 04-30-2003 04:40 AM

Re:check valves
 
Shamelessly stolen from Jeff.

http://a2.cpimg.com/image/DC/40/1849...-01B4013C-.jpg

They are used to keep the MAP from reporting boost pressure to the ECU. If the ECU see's boost it will throw a CEL and drive like poo.
If you fuel with a rising rate you need to do this.

dragmanEX 04-30-2003 06:03 AM

Re:check valves
 
tell me if i am correct. remove the map and run vaccuum lines and T all check valves and connect hose to the nipple on the throttle body.

Turbo-Dan 04-30-2003 02:22 PM

Re:check valves
 
wrong.
keep the map where it is, there is a vacuum line going from the intake manifold to the map, this line you tee off and place a check valve in a way that when there is positive pressure in the line it opens the valve and vents the pressure in the line.

robs99si 04-30-2003 07:10 PM

Re:check valves
 
i have a 99 si & the map sensor doesn't have a vacum hose, it has an electrical conector. is there another map sensor? i know how to install the check valve by removing the map sensor i have, but in the faq it says i don't have to remove the map sensor. if there's a way where i can install the check valves without removing the map sensor. let me know thanks ;D

dragmanEX 04-30-2003 08:22 PM

Re:check valves
 
yea, i checked mine, it is a 99 ex. no vaccuum hose.

turboboy 04-30-2003 09:00 PM

Re:check valves
 
get a missing link....theres one in the classifieds

ONIN 04-30-2003 10:15 PM

Re:check valves
 
YES, my missing link...you won't beat this price.

Turbo-Dan 04-30-2003 11:56 PM

Re:check valves
 
even with a missing link, it still attaches to the vacuum line off the map sensor.

there has to be a vacuum line, thats what controls the map sensor reading.

dragmanEX 05-01-2003 05:55 AM

Re:check valves
 
i think that the map is connected directly to a nipple on the throttle body.


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