390 with poor start and stalling
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390 with poor start and stalling
I am having a problem very similar to rustywheel68's - got a 390 that sat for a couple of years. I got a new carb, figured an edelbrock will sit nicer on an edelbrock intake so now have a new Edelbrock 750cfm carb.
I drained and cleaned the fluids, including the tank, blasted out fuel lines, added an inline filter, replaced the fuel pump, put on a new set of plugs, wires, coil, battery.
I filled her up with fresh 40 weight oil and attempted to start - no luck. Fiddled with the cat AF screws, checked for fuel flow - good, checked the vacuum lines - good, checked for spark - good.
I am able to get it crank and catch with generous foot on the gas as soon as I let go she chokes and dies. The carb has a manual choke at it is wide open.
Am I looking at something internal or is there a trick to get these 390's to run I am not aware of ?
I drained and cleaned the fluids, including the tank, blasted out fuel lines, added an inline filter, replaced the fuel pump, put on a new set of plugs, wires, coil, battery.
I filled her up with fresh 40 weight oil and attempted to start - no luck. Fiddled with the cat AF screws, checked for fuel flow - good, checked the vacuum lines - good, checked for spark - good.
I am able to get it crank and catch with generous foot on the gas as soon as I let go she chokes and dies. The carb has a manual choke at it is wide open.
Am I looking at something internal or is there a trick to get these 390's to run I am not aware of ?
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Well, it had a Holley 750 on it before but ran like crap, although it did idle. It has some things done to it, judging by size of the headers. It has a Mallory distributor going to a Blaster 2, is it safe to just take off the cap and turn it CCW ?
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Well that is what Holley was doing with the previous pump, it's a Carquest Part 6523, Mechanical Fuel Pump
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From: Long Island USA
Is the choke closing, and when you start it, pump the gas pedal 2-3 times, and crank, what does it do?
If it fires right up and then dies, try pumping the gas while cranking and see if it'll start and run...
Make sure the timing is right too, not enough and it will fire, but not really run.
If it fires right up and then dies, try pumping the gas while cranking and see if it'll start and run...
Make sure the timing is right too, not enough and it will fire, but not really run.
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Junior User
Joined: Apr 2015
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Is the choke closing, and when you start it, pump the gas pedal 2-3 times, and crank, what does it do?
If it fires right up and then dies, try pumping the gas while cranking and see if it'll start and run...
Make sure the timing is right too, not enough and it will fire, but not really run.
If it fires right up and then dies, try pumping the gas while cranking and see if it'll start and run...
Make sure the timing is right too, not enough and it will fire, but not really run.
EDIT: Well, after it sat overnight I cant get it to start again, it catches then stalls as I pump the gas to keep it alive and ends in a fireball ...
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