Is this possible? I have a Flowmaster dual chamber muffler sitting in the factory position fed by Edelbrock TES headers. It gets so hot that the gas in my tank actually bubbles and the tank becomes pressurized to the point that it fires the gas cap like a missel when you open it. Ive done all the checks and the venting system is working. The gas tank is warm to the touch and the factory heat sheild is in place. Also when this happens the fuel pump starts to scream. Any ideas?

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1987 T/A GTA 5.7L, Bored .020 and ported for .202 valves, edelbrock headers, flowmaster exhaust, JET STAGE II chip, Comp CAM, Adjustable fuel pressure, Airfoil, K&N filter, B&M stage 2 shift kit, and a home depot ram air(Hey it looks good and it works)

 

maybe your over axle pipe has a hole in it or your fuel pump is set to turbo mode.

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
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