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Discussion Starter · #1 ·
383 sbc using a mech.fuel pump,with Mallory regulator (set @ 7 1/2)I have the lines under the hood covered with heat tubing.It seems that ONLY when the temps on the street get to around 190,( and this is on real hot days) and I stop for a traffic light, then start again,the psi starts to rise upwards to 10 -11 sometimes 12 psi and does not come down only when I shut down the car does it drop,and that takes awhile also.

What could be the problem,and how can I fix it? Thanx for any help
 

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Discussion Starter · #5 ·
The unit I have is a Mallory 4207.It DOES not have a vacume port as do some of the efi units have.It has a 1/4' npt that is being used for the fuel psi gauge that runs to a isolator then into the car
 

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Discussion Starter · #7 ·
Now we're getting somewhere.When you refer to a "bleed" are you refering to the small brass nipple on some regulators? if so,were does this connect to? Thank you for the help
 

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Discussion Starter · #9 ·
Thanx much.I have a stock tank with a nipple the same size I think as the type you are describing.Think it's a quick fix untill I get one with a return outlet.............
 
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