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MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection Have a CDFP fuel pump question? Do you want to add Nitrous or Water Injection to your Mazdaspeed 3/6 ? Please come on in!


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 Old 09-21-2012, 11:36 AM   #1
 
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Default best way to drain the fuel tank

ive got a half tank in the car and want to get to 1/8th before going to the track.
is there an easy way to drain it?
or run it out, go next week.
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 Old 09-21-2012, 11:39 AM   #2
 
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Lots of WOT, or a siphon.

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 Old 09-21-2012, 11:40 AM   #3
 
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Unhook the low pressure side of the hpfp and turn the key to on. That will run the pump, but you better have something to catch all the fuel that is about to shoot out
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 Old 09-21-2012, 11:45 AM   #4
 
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Disconnect your battery, pull the fuse. Jumper the circuit. Pull the low pressure fuel supply hose from the CDFP and feed it into a bigger/longer hose that drains into a bucket or fuel tank.

Use your negative battery cable as an on/off switch.

Originally Posted by TWOptSL0W View Post
Unhook the low pressure side of the hpfp and turn the key to on. That will run the pump, but you better have something to catch all the fuel that is about to shoot out
This only primes the HPFP. It's like a 3 second priming cycle. Lots of key cycles before that tank will empty...
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 Old 09-21-2012, 11:46 AM   #5
 
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I still think lots of WOT is more fun.
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