Hi it’s one of those plastic see through filters right of the carb under the air cleaner. The fuel spurts in never fills the filter all the way up about 3/4 or so. A few weeks back it was plum full I thought my issue was fixed and it came back. I noticed in the tsm it’s supposed to have a three line filter.Stuka wrote:What symptoms are you seeing?
Where is the filter located? Is it near or touching the engine? If so, thats why its getting too hot (if thats the issue). A glass filter can also be handy to see if you are actually having an issue with vapor lock.
A electric fuel pump will not solve this issue if it is vapor lock and the fuel pressure will be too low to change the boiling point much.
Holly 600cfmwill e wrote:What carb are you running? The stock setup or an aftermarket?
I take it that’s what you have on yours. A three barb fuel filter?ghcoe wrote:Electric fuel pump solve all my vapor lock issues. I am running a relay under the hood and 10 gauge wire back to the pump. Pump is mounted on the rear frame rail just behind the tank. I used a Precision pump https://www.oreillyauto.com/detail/prec ... +fuel+pump .
You should have a filter with a return line.
coolhand75 wrote:I take it that’s what you have on yours. A three barb fuel filter?ghcoe wrote:Electric fuel pump solve all my vapor lock issues. I am running a relay under the hood and 10 gauge wire back to the pump. Pump is mounted on the rear frame rail just behind the tank. I used a Precision pump https://www.oreillyauto.com/detail/prec ... +fuel+pump .
You should have a filter with a return line.
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That doesn't sound like vapor lock. If the filter is see through, you would see the fuel boiling if it was vapor lock. It sounds like you have a failing pump, small cracks in the lines that let the pump suck air (but not leak fuel, not uncommon), or the pickup in the tank is maybe getting plugged.coolhand75 wrote:Hi it’s one of those plastic see through filters right of the carb under the air cleaner. The fuel spurts in never fills the filter all the way up about 3/4 or so. A few weeks back it was plum full I thought my issue was fixed and it came back. I noticed in the tsm it’s supposed to have a three line filter.Stuka wrote:What symptoms are you seeing?
Where is the filter located? Is it near or touching the engine? If so, thats why its getting too hot (if thats the issue). A glass filter can also be handy to see if you are actually having an issue with vapor lock.
A electric fuel pump will not solve this issue if it is vapor lock and the fuel pressure will be too low to change the boiling point much.
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Exactly. I have a glass filter on my J10, its never full.will e wrote:I have a see through filter on my 73 Mustang. There are often times it isn't 'full' of fuel.
Before you start throwing parts at it. Get a fuel pressure gauge. Information is everything.
I’ve bypassed the fuel tank using a gallon gas can and it seem to work fine but now that you mentioned rich conditions it also has that I think I should try the return line setup. Cross your fingers. ThanksStuka wrote:That doesn't sound like vapor lock. If the filter is see through, you would see the fuel boiling if it was vapor lock. It sounds like you have a failing pump, small cracks in the lines that let the pump suck air (but not leak fuel, not uncommon), or the pickup in the tank is maybe getting plugged.coolhand75 wrote:Hi it’s one of those plastic see through filters right of the carb under the air cleaner. The fuel spurts in never fills the filter all the way up about 3/4 or so. A few weeks back it was plum full I thought my issue was fixed and it came back. I noticed in the tsm it’s supposed to have a three line filter.Stuka wrote:What symptoms are you seeing?
Where is the filter located? Is it near or touching the engine? If so, thats why its getting too hot (if thats the issue). A glass filter can also be handy to see if you are actually having an issue with vapor lock.
A electric fuel pump will not solve this issue if it is vapor lock and the fuel pressure will be too low to change the boiling point much.
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EDIT: Its also possible the pump is pushing fuel passed the needle and seat because there is no return line. This would result in rich conditions which can also cause the engine to stumble.
your mechanical pump should be off the circuit, mine is not on the fueling hose circuit. Now the mechanical fuel pump is removed and a cover plate has been installed on the timing covercoolhand75 wrote:Update
I installed a new electric fuel pump today I’m still have the same issues. I thought the electric pump would push fuel past the mechanical one but it doesn’t seem to. When the engines cold they seem to fill the filter fully once the engine gets to operating temp they don’t keep the filter full. Help!!!
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