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Old 06-16-2004, 05:32 PM   #1
White 2.5rs
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Default is that fuel vacuum sensor necessary?

That one under the manifold...
i did parallel and converted to aeromotive rr/fpr <this thing is awesome everyone needs one?!>
do i still need that stupid sensor? isnt its only purpose for telling me my gas cap isnt on?

thanks
alex
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Old 06-16-2004, 06:27 PM   #2
Aphex
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it's not a sensor, it's a solenoid that sends gas fumes into the engine at certain times to impove emissions and gas mileage.

purge solenoid I believe it is called.
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Old 06-16-2004, 06:46 PM   #3
no-coast-punk
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Definately leave that vacuum line in place if you are still on the stock ECU with some piggyback system.

That is for your evaporative emissions system, what it does is store all the fuel vapors that would normally evaporate off into the atmosphere. It releases these fuel vapors when you are in a cruise condition. It's a very precise system and if you disable it a) will throw a bunch of CEL's b) completely dick up your fuel mapping under certain cruise conditions because the PCM is expecting all that extra fuel from the evap system to go through the motor, only when it doesn't the car will run momentarily lean. It in no way effects power and actually gives you better gas mileage when cruising since it recovers fuel that would otherwise be dumped into the air.

If you are on a standalone system... I would still leave it since good standalones can still run the evap purge system.
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Old 06-16-2004, 07:29 PM   #4
Wedge
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I agree with NoCoast, the LINK has a line for the Purge Solenoid valve.
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Old 06-16-2004, 07:35 PM   #5
White 2.5rs
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alright well...
i took my fuel feed side
teed it into both banks
teed it back via the rrfpr
then back to the return

where do i put that solenoid back into?
thanks
alex
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Old 06-16-2004, 10:09 PM   #6
Aphex
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there should also be a vacuum line that runs back with the fuel feed and return lines, one port of the solenoid goes there, the other port goes into the intake manifold if you disconnected it. If you need it, I can get pics of the solenoid and the lines tomorrow since my intake manifold is off at the moment.
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Old 06-17-2004, 03:18 AM   #7
White 2.5rs
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please do...i have no clue wth is going on on how to rehook it up
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Old 06-17-2004, 11:40 AM   #8
Aphex
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Ok, first take this line....


and connect it to this line....


then take the other line....


and connect it to the port on the top of the manifold.....



Hope that helps.
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Old 06-17-2004, 01:04 PM   #9
White 2.5rs
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thanks, still got that port
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