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this is interesting thought i would let you guys in on it

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selmerguy

15+ Year Contributor
1,811
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Nov 14, 2004
Killeen, Texas
well after my failed attempt to install a sfmu(broken used pos) i had to reinstall my fmu and run that long vac line. last time i used a tee that was allready there. it went to the vac line going to the ac compressor. not knowing anybetter my fuel pressure under boost(8.7psi) would peg and it took it awhile to get back to normal(55 psi) well that so called tee has a check valve in it. so i changed my vaccum setup and man can i tell a big difference. my car actually feels fast now. and the fuel pressure after boost immediately drops to 55 psi. i haven't had a chance to log my afrs yet but my wideband xm-1 looked good from what i could tell between watching all my gauges and the road. so to make a long story short dont use that thing as a tee for nothing.
 
hey can you describe which vac line this actually is b/c i think it may be the one i have my BOV hooked up to which could explain why it sounds funny most of the time.

If its the one i'm thinking of it comes off the passenger side of the intake manifold and runs towards the front of the car and has a nipple on it that is capped from the factory as another port in the line.
 
cs82685 said:
hey can you describe which vac line this actually is b/c i think it may be the one i have my BOV hooked up to which could explain why it sounds funny most of the time.

If its the one i'm thinking of it comes off the passenger side of the intake manifold and runs towards the front of the car and has a nipple on it that is capped from the factory as another port in the line.
yep thats it don't use it. you can tee before it if you want.
 
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