I have been fighting some hot start / flooding problems over the last few years. You know...drive the car thirty miles or so, stop for gas, get a Coke, and get back in to start after ten minutes of heat-soak and the engine acts flooded. Hold gas pedal to floor and it starts, puffing a little black smoke. Never stranded me, just annoying. It seems the fuel mileage has been continually getting worse too.
So I hooked a fuel pressure gauge to the Biscayne Friday evening. My gauge reads 0 to 10 psi. Gauge pegged out at 10 psi plus. Don't know how high the pressure was?? Killed the engine and within a minute or two the pressure blead down to five psi and within ten minutes it lost all residual pressure down to zero, indicating either a bad check valve in pump and/or carb needles not closing. Bought a new pump at Napa Saturday morning rated at 5 to 7 psi. Installed pump with gauge. Started motor and gauge read 6.5 psi regardless of rpm. Killed motor and it held residual pressure at 5psi for two hours. Hoping this may solve some of the flooding issues. Thinking the ten plus psi was blowing past the float needles and flooding the engine. I have read that Edelbrock carbs don't like anything over six psi or they will flood. I haven't had a chance to test drive it yet, but I do have high hopes. What are your thoughts or predictions?
So I hooked a fuel pressure gauge to the Biscayne Friday evening. My gauge reads 0 to 10 psi. Gauge pegged out at 10 psi plus. Don't know how high the pressure was?? Killed the engine and within a minute or two the pressure blead down to five psi and within ten minutes it lost all residual pressure down to zero, indicating either a bad check valve in pump and/or carb needles not closing. Bought a new pump at Napa Saturday morning rated at 5 to 7 psi. Installed pump with gauge. Started motor and gauge read 6.5 psi regardless of rpm. Killed motor and it held residual pressure at 5psi for two hours. Hoping this may solve some of the flooding issues. Thinking the ten plus psi was blowing past the float needles and flooding the engine. I have read that Edelbrock carbs don't like anything over six psi or they will flood. I haven't had a chance to test drive it yet, but I do have high hopes. What are your thoughts or predictions?