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Is my fuel pressure regulator bad? Need help

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Old 06-13-2005, 12:47 PM
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Car: 1991 camaro RS
Engine: 305 Carb
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Is my fuel pressure regulator bad? Need help

I just got done with my TBI to Carb Swap, and i dont think the engine is getting the fuel that it needs to run. I have a inline gauge hooked up, and when i have someone turn the key on while i watch the gauge, it reads zero, i have even watched it while the engine is being turned over and zero. i unhooked the line from the carb and turned the key to see if anything came out and at first o got nothing, then i adjusted the regulator and a little bit came out when i first turned the key then a little more after i turned it over for about ten seconds, and thats all. heres the pic of the regulator
Attached Thumbnails Is my fuel pressure regulator bad? Need help-regulator.jpg  
Old 06-13-2005, 12:47 PM
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Car: 1991 camaro RS
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Another, and by the way, the engine actually fired up and ran once, but then i went back today and this is what happened.
Attached Thumbnails Is my fuel pressure regulator bad? Need help-regulator2.jpg  
Old 06-13-2005, 02:15 PM
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???
Old 06-13-2005, 02:54 PM
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Sound like you dont have it adjusted right. Did it ever have pressure?

Also, do you have the lines hooked up correctly?

Is that a mallory 3-port bypass regulator? Looks a little different than mine.

Last edited by bluegrassz; 06-13-2005 at 02:56 PM.
Old 06-13-2005, 03:48 PM
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Car: 1991 camaro RS
Engine: 305 Carb
Transmission: 700R4
Sound like you dont have it adjusted right. Did it ever have pressure?
I messed around with different pressure settings for about an hour. It must have had pressure at one point becasue it ran. I went and got a gallon of gas to put in it, the gauge is reading that it has a little but im gonna try anyways. The gauge is a mallory 3 point, but i think its an older model, i bought it off a friend
Old 06-13-2005, 04:43 PM
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Car: 1991 camaro RS
Engine: 305 Carb
Transmission: 700R4
Ok, i officially a moron, it was out of gas, she fired right up and i gave her some fuel. But i do have a few more questions. I had it running and the gauge was still reading zero. Wander what could cause that? and the regulator, does it have to be sitting perfectly stright up and down, as you can see in the picture, it is leaning.
Old 06-13-2005, 05:03 PM
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Transmission: A bad one & a good one
Axle/Gears: A weak one & a chained one
Originally posted by del91_305
Ok, i officially a moron, it was out of gas, she fired right up and i gave her some fuel. But i do have a few more questions. I had it running and the gauge was still reading zero. Wander what could cause that? and the regulator, does it have to be sitting perfectly stright up and down, as you can see in the picture, it is leaning.
Get a new gauge... Carb fuel gauges are wicked cheap.
Old 06-13-2005, 08:58 PM
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Car: 1991 camaro RS
Engine: 305 Carb
Transmission: 700R4
Ok let me ask a stupid question, you saw the regulator in the picture, when you tighten the screw does that raise the pressure?

Get a new gauge... Carb fuel gauges are wicked cheap.
This is the second gauge i have used and had the same results
Old 06-13-2005, 09:06 PM
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Axle/Gears: A weak one & a chained one
Sure you have the gauge run in between the regulator and the fuel line feeding the carb? Hey, just doublechecking Lol


Uhhhm.....I'm not sure as far as which direction richens and which leans....but you can probably figure that out by ear. Or by turning it a set amount of turns one way, then going to smell the exhaust to see if it smells richer or less rich. That's what I did on my ex gf's truck tuning the carb when I forgot which screw was the fuel and which was the air.
Old 06-13-2005, 09:54 PM
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Car: 1991 camaro RS
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Sure you have the gauge run in between the regulator and the fuel line feeding the carb? Hey, just doublechecking Lol
Yes i am sure
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