Was driving home from an ELTA car show in Ontario. The car ran flawless on the way up , and on the way back. Until about 5 Mins from home the car dies. I coasted off the main street . At first I thought maybe I had a vapour lock so I let the engine cool down. I would crank it and it fired right up but died immediately. I had a spare fuel filter so threw that on. Then cranking it I am getting no fuel threw the filter and nothing out of the carb. Yes I have enough gas lol. It's a Carter mechanical pump on it. Kind of old but not a ton of run time on it really. I am 90% sure it's gotta be the pump?
Did you check to see if the oil level in the motor had come way up ? ( gas in the oil)
Have you ever changed the short rod that the fuel pump gets pushed with from inside the motor ?
when we put the current pump on , I do belive we put a new pump rod in as well. There is no gas going threw the filter like I said. The filter is before the pump so I can't be pumping fuel into the engine / oil.
If the filter is before the pump why would you expect to get fuel through it when cranking? The only possible fuel flow through a pre-pump filter would by gravity and the filter would have to be well below the tank fuel level.
The question about fuel in the oil is a reference to a failed pump diaphragm allowing fuel to rum into the sump. You need to remove the fuel line to the carb and check for fuel flow there while cranking. BTW, the new fuel pump pushrods are more apt to fail than the old originals.
so your saying the only way the factory pump gets fuel to it is threw gravity ? And why would I not expect any fuEl threw cranking. How else is it supposed to get fuel ?
The fuel system is stock style with carter pump and llines upgraded to 3/8 without a vapour separator .
You stated "The filter is before the pump" and the pump supplies the pressure so why would you expect to get pressurized fuel from the filter? :confused:
The pump creates suction which draws the fuel into the pump, pressurizes it and sends it to the carb. If the system is "stock style", then the filter is after the pump, not before.
Check the pushrod.....
If it is a big block & the fuel pump push rod is new, check it for sure.
New ones 'go away' quick, the metallurgy is just not the same.
Quote from: John_Kunkel on August 13, 2018, 12:56:06 PM
You stated "The filter is before the pump" and the pump supplies the pressure so why would you expect to get pressurized fuel from the filter? :confused:
The pump creates suction which draws the fuel into the pump, pressurizes it and sends it to the carb. If the system is "stock style", then the filter is after the pump, not before.
I guess a slight misunderstanding . I didn't expect the filter to pressurized . But the pump should pull the gas threw the filter . I should be able to see fuel threw the filter .
On a new note . I pulled the push rod out. It 3.03 " what I have read is that I am basically 1/4" (.25) short ! Honestly it was so long ago I can't remember if it's a new one or original !
But it looks like the rod is shot. So what I gotta start replacing this thing like a damn spark plug!? I don't wanna know where that .25 of material is !
replace the pump rod, change the oil & filter......drive the car......easy
Quote from: A383Wing on August 13, 2018, 09:04:47 PM
replace the pump rod, change the oil & filter......drive the car......easy
Ya true . I'm not really worried about the metal. If it's the orginal or new 99% of it is sitting in the hot tank at the machine shop! Got 1600 Km on the motor since rebuild
Well there you go it was the push rod after all