Beause of loss of power, I disassembled and put in all new gaskets, etc. I did find a lot of rubber debris on the tiny filter screen. Problem is, when i re installed it, fuel does not find its way to the float chambers. My pressure gauge is high, and when loosened, the fuel inlet squirts fuel out. I can see the filter screen intact. So...what is the most common error that an amateur makes on reassembly, please!!
Botched Edelbrock 1407 rebuild?
- Thread starter Geff McCarthy
- Start date
Geoff 2
Well-Known Member
N/seats could be jamming in the closed position. So no fuel will enter the carb. Remove carb top. Hold up & watch floats drop down. Needles should drop with floats. If not they are binding.
Unless the n/seats are severely worn, I do not use them in current o'haul kits. Don't trust them.
Unless the n/seats are severely worn, I do not use them in current o'haul kits. Don't trust them.
Thanks o ypu both. Yes I adjusted the floats to the Ed specs. I backed out the idle jets on the exterior to allow the pointed cut-offs that mate to the float, to drop down. Will try that again and if not, take off the top....ugh
dvw
Well-Known Member
The baffel plate that sets in the bowl may be backwards. If so it will jam the float. It may bend the float and the plate. They can be straightened.
Doug
Doug
The screen did its job on the seats.
All that black rubber is from a hose on the carb side of your inline fuel filter.
You need a new section of hose, I would stick a new inline filter on the line also.
Check what dvw told you.
Also check that you do not have any sharp edges on your hard lines and fuel inlet.
All that black rubber is from a hose on the carb side of your inline fuel filter.
You need a new section of hose, I would stick a new inline filter on the line also.
Check what dvw told you.
Also check that you do not have any sharp edges on your hard lines and fuel inlet.
Confusing I agree. The float rises, and via a lever, pushes down on the pistons to shut off fuel flow. I think the pistons may be jammed. I will check again the orientaion of the baffle plates; i had them backwards originally, and the top would not mate with the bottom of the carb!
Darter6
Well-Known Member
I had the same problem. The rebuild kit brass needle and seat (both)had a hunk of thin brass blocking flow.
Must have been from the machining of the seat. Quality of parts now a days. Just a thought.
Actually the float rises with inflowing fuel, pushing the needle up into seat, shutting fuel flow off. Did you check the float height and float drop and adjust as necessary?
Also, did you install these little springs on the float/needle?
Those springs are meant to fit pretty loose on the float. If fit too tightly on the float they cause the needle to bind in the seat as the needle has to travel straight up/down while the float swings in an arc. I adjust the springs to where they slightly dislodge the needle from the seat when the float is at its specified drop. That insures the fully dropped float can pull down on the needle to dislodge it in case it has stuck. Although those brass floats are pretty light so they can only provide so much force, less than the fuel pressure I’m sure.
I learned these springs had to fit loose when my needles would bind and not close, resulting in flooding. I had bent the springs so they rode on the float lever pretty tightly - bad mistake. You seem to be having an opposite issue - can’t get the needles to drop. I don’t know if the springs could cause that or not. But something to be aware of.
I have never seen such springs, and there were none in the Ed overhaul kit. I found the problem: i had installed new, but incorrect seats and needles. probably for a 1406, they were smaller. I had also decided to install jets and needles to be 1 stage leaner, because the old plugs were wet. Result, rough running backfires, stall anbd die. I reinstalled all original bits, double checked the float settings, reasssembled and...same backfires and stalling. Idle is smooth timing 10deg with vacuum line off, about 18deg with line on.
I think I have made a fundamental mistake here, but cannot deduce what.
The whole process started with an apparent fuel feed problem, which showed with debris on the carb inlet filter. I have yet to address potential causes of that problem. Help please!!
I think I have made a fundamental mistake here, but cannot deduce what.
The whole process started with an apparent fuel feed problem, which showed with debris on the carb inlet filter. I have yet to address potential causes of that problem. Help please!!
It might be a problem further upstream.
A couple suggestions:
Is the tank clean? I'd check the pickup sock on the sending unit.
Did you put new plugs in it?
Finally edelbrocks tend to be pretty lean with factory setup. Going leaner might not have been the right thing.
A couple suggestions:
Is the tank clean? I'd check the pickup sock on the sending unit.
Did you put new plugs in it?
Finally edelbrocks tend to be pretty lean with factory setup. Going leaner might not have been the right thing.
autoxcuda
Well-Known Member
The rubber debris is the inside of your rubber fuel lines getting eaten away from inside out.
Need those FI rated lines that are more modern fuel safe
Need those FI rated lines that are more modern fuel safe
Geoff 2
Well-Known Member
[1] Different n/seat sizes will have a small impact on fuel level, but this will NOT be causing your problem.
[2] Spring clip on the needle. Some carbs used them, others didn't. Either way, no big deal, unless they bind.
[3] Idle is smooth? Maybe time to look at ignition or wiped cam lobes/lifters.
[2] Spring clip on the needle. Some carbs used them, others didn't. Either way, no big deal, unless they bind.
[3] Idle is smooth? Maybe time to look at ignition or wiped cam lobes/lifters.
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