ea81 fuel pump

[mellow65]

ok so i was out working on my new hatch that i got trying to get it to start.

 

so far the things i fixed, dissy WAY off, i mean teeth off. not any kind of damage. People please if you dont know how to put a dissy back in after pulling it out, dont pull it out.

 

i have fuel but only when i crank. is that normal? I would figure it would pump some fuel right as you turn on the key to prime the carb but im not sure.

 

I put some fresh gas in it, and was cranking on it. I would get sputters but no start.

 

i pulled the plugs and they were all fouled out, so i took them all to the wire brush just to get clean enough to fire. but no luck.

 

so my next mission is to check and see if i am getting a good spark.

 

but i need to know if the fuel pump is supposed to come on when the key is on or only when you crank and it is running.

 

also if it is supposed to pump when the key is on where should i check to see why it isn't. is that a fused thing or is there a control box or something

 

thanks

[GeneralDisorder]

There's a FPCU (fuel pump control unit) attached right above the hood release cable bracket under the dash. It supplies power to the fuel pump only durring cranking, and by using the tach pulse from the coil, when the engine is running. If the engine stops turning, the pump stops pumping. Safety feature in case of an accident.

 

It does provide a short (like 2 seconds) run of the pump when the key hits the "on" posistion, but by the time you get back there to check the voltage it will be gone.

 

GD

[mellow65]

ok well then how much fuel is there supposed to be when it pumps, is there a amount that any manual says, i was pumping it into a pop can and there was some but not tons. but i guess im used to seeing what comes out of the FI pumps, which is a lot more.

 

and mine pumps nothing until its cranking. i checked it with my pop can, so then maybe that control unit is toast.

 

well ill make sure the spark end of it is good in the next day or so.

 

it so wanted to start to, i could just hear it.

[GeneralDisorder]

Not a lot - I used to use the carb pump in my sedan to redistribute my free gas ability at my last job to all three of my rigs in like 5 gallon increments. It would take like 10-15 minutes for it to pump out 5 gallons. The pressure is like 2.5 psi, and it really doesn't move a lot of fuel at that pressure due to the small line diameter. More fuel at a low pressure like that would really require larger lines.

 

GD

[mellow65]

ok so its probable pumping enough, but it doesn't pump anything when the key is first turned on. So i going to check and see about the control unit and then check my spark. if all else fails i may just yank my whole dissy, cap, wires out of the wagon just to see if that is the issue. at least i know they are all good in the wagon.

 

Not a lot - I used to use the carb pump in my sedan to redistribute my free gas ability at my last job to all three of my rigs in like 5 gallon increments. It would take like 10-15 minutes for it to pump out 5 gallons. The pressure is like 2.5 psi, and it really doesn't move a lot of fuel at that pressure due to the small line diameter. More fuel at a low pressure like that would really require larger lines.

 

GD