I cleaned my fuel system and changed fuel line from tank to fuel pump. Changed filter and also added in line filter . Can not get the system to prime . All clamps are tight , don’t think I’m sucking air any where . Anyone have an idea ?
Fuel system (1 Viewer)
- Thread starter FJ40Austin
- Start date
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cwwfj60
Supporting Vendor
So you have two filters?
You don’t have a kink by the tank do you? Where it comes into the cab (on pre-79) I find the cheaper low pressure fuel hose rated for carbs is easier to kink, especially in that spot. I use the higher pressure EFI stuff for that reason.
Pump could be weak?
Issues leading up to this?
It will take a minute or two of cranking intermittently to get fuel to the bowl.
You don’t have a kink by the tank do you? Where it comes into the cab (on pre-79) I find the cheaper low pressure fuel hose rated for carbs is easier to kink, especially in that spot. I use the higher pressure EFI stuff for that reason.
Pump could be weak?
Issues leading up to this?
It will take a minute or two of cranking intermittently to get fuel to the bowl.
BigHighBlue
GOLD Star
When I replaced the pump and lines on my 79 it seemed like it took forever to get fuel to the carb. Mines a factory set up.
- Thread starter
- #4
All was running fine before I cleaned the system, not getting fuel in the glass filter . I think I’m going to try removing inline filter .
- Thread starter
- #5
It’s steel tubing going from pump to the carb . I will just have to go back to tank and start disconnecting lines and see if I have fuel at each point
BigHighBlue
GOLD Star
Could the in line be backwards?
cwwfj60
Supporting Vendor
Also, you could fill the bowl up on the carb with fuel, take the air cleaner off and carefully pour fuel into the vent ports, there is two brass vents sticking out, one is facing up which allows you to pour fuel in. Do this till the bowl is full. Then it should fire up, a little extra rpms from the engine running will help everything prime, hopefully.
I’m assuming aisin carb??
If this doesn’t work after a few more tries I’d say you have a restriction or a weak pump
I’m assuming aisin carb??
If this doesn’t work after a few more tries I’d say you have a restriction or a weak pump
- Thread starter
- #9
No have not tried that yet , ran out of time last night , I will try that this evening. Thank you
no It’s right I checked that .
Time for a Sniper. 
It's a simple system. Check for any obstruction in the fuel tank. Hoses (switched supply and return), and the fuel pump. As AJ pointed out, pull the hose from the carb and crank it to see if fuel is flowing.
- Thread starter
- #12
Thanks everyone, but I had my head up my rear . This one has two tanks and I had fuel valve in wrong position.