Hard starting issue, Chevy 350 small block with Edlebrock Performer Carb I have a small block 350 crate motor (stock heads, compression, bottom end, etc.) with an Edlebrock perfromer series carb in my 87 Firebird Formula. The engine is very difficult to start. When I crack the fuel lines at the carb, the line is dry, even when I crack it shortly after running. The engine has a relatively new 3 line, mechanical fuel pump. The engine runs fine once started, but is very difficult to get started, especially when hot. I don't know how to tell if the fuel is draining back through the pump, if there is a vacuum forming in the tank, or if it's something else. I didn't do the engine swap myself. I believe the car came with EFI, so I'm concerned something was botched in the tank when the it was converted to running off a mechanical pump. Someone suggested that sediment in the tank may be preventing the anti-drainback in the pump from functioning, could this be it? Does anyone have advice on how I can diagnose, and fix this problem? |
Re: Hard starting issue, Chevy 350 small block with Edlebrock Performer Carb If you shoot an ounce or 3 of fuel into the intake before trying to start it, does it start RIGHT UP? |
Re: Hard starting issue, Chevy 350 small block with Edlebrock Performer Carb
Originally Posted by sofakingdom
(Post 5948065)
If you shoot an ounce or 3 of fuel into the intake before trying to start it, does it start RIGHT UP? |
Re: Hard starting issue, Chevy 350 small block with Edlebrock Performer Carb Even if the fuel was draining back through the pump, there is still fuel in the carb. It sounds to me that the carb is slowly draining out the fuel in the bowl into the motor. Meaning now you have nothing to try and start the motor with . I hear this is a common problem with edelbrock carbs. |
Re: Hard starting issue, Chevy 350 small block with Edlebrock Performer Carb
Originally Posted by mustangman65_79
(Post 5948572)
Even if the fuel was draining back through the pump, there is still fuel in the carb. It sounds to me that the carb is slowly draining out the fuel in the bowl into the motor. Meaning now you have nothing to try and start the motor with . I hear this is a common problem with edelbrock carbs. You can test this for yourself by removing the gas cap after running for a while. If you hear air being pulled into the filler neck as the cap is removed, then this is your problem. |
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