What size spring
11-18-2005
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Rep Power: 289 
What size spring
what sinze spring goes in the sf fmu. i found the problem to my car leaning out. there was no spring in the fmu. someone please help me asap. i need to drive this car at 3 today
11-18-2005
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Rep Power: 262 well, that is a difficult thing to find....
is it a new style one, or is it the old blue one?
If it is a blue one, then you need to do this.....
take the top off. Find a spring that fits inside the fitting that is drilled out. Then take that spring, and cut it to a length to where 1/8" of the spring sticks out.
It has to be a somewhat stiff spring. Not soo hard that you cant compress it with your fingers, but not a spring that is waaaay easy to compress.
If its the new style one, you are pretty much screwed. You would have to buy an RPM service adjustable fuel pressure regulator for a B-series, take the spring and seated foot and threaded foot out of it, and put them in the fuel system.
is it a new style one, or is it the old blue one?
If it is a blue one, then you need to do this.....
take the top off. Find a spring that fits inside the fitting that is drilled out. Then take that spring, and cut it to a length to where 1/8" of the spring sticks out.
It has to be a somewhat stiff spring. Not soo hard that you cant compress it with your fingers, but not a spring that is waaaay easy to compress.
If its the new style one, you are pretty much screwed. You would have to buy an RPM service adjustable fuel pressure regulator for a B-series, take the spring and seated foot and threaded foot out of it, and put them in the fuel system.
11-18-2005
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Rep Power: 289 it is the old style one and i picked up some srpings that are about the size of the hole today so i will cut one down to size tomorow and try it. also i was looking on vortech web site and it said not to take the whole thing apart well guess what i already did before i thought to look on the web site. did i break anything doing this. i put it back together the way it came apart.
11-18-2005
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Rep Power: 262 make sure its back together the way its supposed to be. Did you take the 4 screws out of the bottom of it? If so, you have to make sure that metal foil disc is seated properly in the bottom. That is what physically controls the pressure.
An easy way to tell if its working, put a pressure guage on the line. Test the pressure before you install the spring (should be about 45 or so). Then install the spring and test it again. Usually they are around 50 psi with the fuel pump running.
An easy way to tell if its working, put a pressure guage on the line. Test the pressure before you install the spring (should be about 45 or so). Then install the spring and test it again. Usually they are around 50 psi with the fuel pump running.
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