Fuel Pressure Question, wierd noise
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Senior Member
Joined: Sep 2004
Posts: 502
Likes: 1
From: Leesville, LA
Car: 1989 Camaro RS
Engine: Modified 350 TPI
Transmission: Modified 700 R4
Axle/Gears: Posi 3.42
Fuel Pressure Question, wierd noise
I installed a Walbro 255 fuel pump. Also a crane cams adjustable Pressure Regulator. When I turn the key I hear the pump come on. When I turn the engine over and not start it I here a hissing. Its not a leak, it sounds like excess pressure being released into the plenum.
Is this whats happening?? If not, what is it?
Is this whats happening?? If not, what is it?
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Joined: Feb 2000
Posts: 7,015
Likes: 2
From: Schererville , IN
Car: 91 GTA, 91 Formula, 89 TTA
Engine: all 225+ RWHP
Transmission: all OD
Axle/Gears: Always the good ones
Make sure you didnt tear the FP diaphragm when u installed it and that it actually sealed to the regulator base.
Also did u reconnect the vacuum line?
The Walbro will be louder than stock sounding both at the rear of the car and at the fuel rail.
later
Jeremy
Also did u reconnect the vacuum line?
The Walbro will be louder than stock sounding both at the rear of the car and at the fuel rail.
later
Jeremy
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