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Old 01-17-2005, 01:43 AM   #1
DONAUDI
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Join Date: Oct 2004
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Default defi fuel pressure guage

installing defi fuel pressure guage. need to know what line to tee into. have 04 sti. looks like fuel lines are color coded. one of them is blue and i think the other is yellow. also what diameter tee is needed. thankx
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Old 01-17-2005, 04:19 PM   #2
DONAUDI
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Bump or answer or link?
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Old 01-17-2005, 06:40 PM   #3
ronaldwrx
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i just put it inline after the fuel filter using a T that i think i got from Pegasus - i dont remember which size, just go look at the hose maybe 1/4 or 5/16 .. make sure you get one threaded properly for your defi sender .. http://www.pegasusautoracing.com/
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Old 01-17-2005, 08:06 PM   #4
DONAUDI
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BUMP
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Old 01-18-2005, 01:39 AM   #5
vf39hipsi
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there is no underhood fuel filter on the STi. Just trace the line that goes to the fuel rail NOT THE PRESSURE REGULATOR, I believe it is the top line when you are looking by the strut tower.
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Old 01-18-2005, 02:21 AM   #6
DONAUDI
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I could be wrong but i pulled some fuel lines today to get diameter. I'll post it when i get the correct size. Anyways i pulled the top line then had someone turn on the car. The fuel shot from engine side to rear of the car. So i pulled the only other thick fuel line. Which was the bottom most one. Had them start the car again and this time it was going toward the engine. So i hope its this line theres three altogeher. But only two are thick the other one is thin. By the way what is those black fpr looking devices on the fuel line. Never seen those before in my 5+ years of wrenching.
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Old 01-18-2005, 02:15 PM   #7
DONAUDI
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Fuel line size 5/16. Will get part #'s from napa later.
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