destins 1964 fj40 FST restore thread

[destin]

ok good news, freeze plugs fixed, and drove it to my shop

bad news, stilla fuel dilvery problem.

Was running great, then i got some fuel went to my shop, installed the speedo cable.
Then took it out for a drive, stumbling stumbling stumbling, like it is not getting and fuel, missing grrr.


So what shoudl I do?

1) clean the fuel tank
2) replace all the fuel lines
3) install a longer stud on the manifold so i can put a carb insulator on.
4) rebuild a different aislin carb.

The fuel system is not complex, so i have no idea.

some problems that might be it...

a) some sand in the tank from the painters... have inline filters... this could explain why when i filled some gas in the tank it stirred some gunk in the tank maybe?

b) pin hole leak in the gas line somewhere causing a vacuum leak?

c) with no carb insulator below the carb it is causing the fuel to boil?

d) carb that was rebuilt was pretty warped, and Mark mentioned it might be kinda wonk.

e) a combination of all these?

anyone can recommend where to start? tank first? then up the line to the carb?



Gotta be a simple answer, where the hell should i start this weekend guys?

new bits:

new rebuilt engine,
new distributer
new cap lines points etc.

 

[JohnnyC]

body work=dust

blow out the lines...clean out the carb...replace the filters...

you have glass filters right? are they emptying...or...is there still gas in it?

how many filters do you have?

 

[destin]

body work=dust

blow out the lines...clean out the carb...replace the filters...

you have glass filters right? are they emptying...or...is there still gas in it?

how many filters do you have?

yeah i think the tank got sand in it too from the sandblasting/ body work etc...

i have two inline filters...

My guess is gunk or something in the gas, to make it go form running well to s***?

whats a good way to drain the tank without having a lift? hard to get gas cans under the drain plug, don't ask me how i know that one already haha

Thanks for helping bro.

need to get this sorted before it kills me

 

[My wife said no FJ!]

Nothing to add, except the irony of the old girl running well enough last year to take you around with her 45 year old engine, and then all the problems after that old F135 was overhauled.

Hang in there Destin, and start posting some pics...I miss those pics

 

[destin]

so I am thinking drain the tank, then blow it out with a compressor? ( what is the best way to clen it? surely not water? )

Then run new lines and blow out the copper ones? ( I am running the old hard plastic one from the tank to the new filters, could be the problem there no? )

new filters...

then from there i would know if it was the carb?

Trying to employ a logical process of elimination, but want to get advice from you all, with out all your help i would have been screwed along time ago

 

[destin]

Nothing to add, except the irony of the old girl running well enough last year to take you around with her 45 year old engine, and then all the problems after that old F135 was overhauled.

Hang in there Destin, and start posting some pics...I miss those pics

Thanks man, it was running roughing rough then too, but i have somethings is wack now for sure. has to be the fuel system yeah?

 

[fj404life]

1st unhook the fuel line from the carb and crank the motor over while ya watch the gas come out...Should be a bunch pumping out. There is a spec for how much over a certain time period but you should be able to tell if your clogged up or not pumping.

Does it act up cold or only after driving a bit? Check the carb fuel level when its acting up.

 

[destin]

the fuel bowl is steady at the line, i can pull the throttle manually with my hand and it was stumbling and cutting out. It happened after driving it a bit and after adding gas then stopping to instal my speedo cable...

if it is getting adequate fuel in the bowl, then it would have to be gunk in the tank and lines ? or vacuum leak in the system?

 

[dkroth]

Destin,

Rig up a small auxillary tank under the hood with a short section of fuel line going right to the fuel pump. Maybe a 2 liter Coke bottle duct taped to the frame rail. That will eliminate the main fuel tank and a bunch of old fuel line from the equation. Two liters would let you drive for 15 or 20 minutes. Let it heat soak when you refill the bottle. This way you won't have to muck with draining the main tank.

Are you seeing anything in your filters?

Siphon some gas from the tank. See if that pulls any debris from the bottom of the tank.

Install a fuel pressure gauge on a tee right in front of the carb so you can see what the pressure is doing during the stumble.

 

[destin]

Destin,

Rig up a small auxillary tank under the hood with a short section of fuel line going right to the fuel pump. Maybe a 2 liter Coke bottle duct taped to the frame rail. That will eliminate the main fuel tank and a bunch of old fuel line from the equation. Two liters would let you drive for 15 or 20 minutes. Let it heat soak when you refill the bottle. This way you won't have to muck with draining the main tank.

Are you seeing anything in your filters?

Siphon some gas from the tank. See if that pulls any debris from the bottom of the tank.

Install a fuel pressure gauge on a tee right in front of the carb so you can see what the pressure is doing during the stumble.

cool man

sounds like the plan would be flush the lines from the carb to the pump...

and pop in a gas can and run it up for a while, and see if it still exists?

if it runs well, then it is the tank... or the fuel line from the tank...

or if it runs poorly the carb?

Thanks man

 

[destin]

hey, also what does heat soak mean?

Sorry to sound thick

I pick up an inline fuel pressure gauge tomorrow before i head to my shop

Thanks again man

 

[a.greenspan]

Destin control your gas cap maybe it`s a venting problem of the cap, had it in spring.
Evil.... you search & search.... and it`s this f..... gas cap!

Some "trouble" (gone) ....
.... after removing the carb ( carb is in good condition) and let the 45 sit in the sun gas leaked out of the gas line * ... it was the tank venting ( the old ones vent over the gas cap) that hadn`t work well... so I put a good venting gas cap on it and it works fine .
Curious thing
Cheers
Peter

 

[destin]

ok guys i will try all these combinations of crap and see if I can fix it.

really frustrated, been doing all the right things, fresh motor etc, machined manifolds, new distributer, new coil wires caps rotors etc.

I cannot fathom why this thing is not running perfectly

Gonna have to give up soon, cannot afford paying people and it never being right.
Put a lot more money into this than i planned, and it sees that at that price of time and money, it should at least run well.

I give it the next two days of me fumbling to get it right in the fuel system, if not i might need to dump it into storage until i next year. lame

 

[Living in the Past]

Gas cap on a 64 should be a non issue. Wasn't until around 71 when there sealed the cap. There is a small hole in the fill neck where the chain attaches that should let the tank vent vent. Have you double checked the spark and the timing?

When I have more time I we tell you my freeze plug story after I rebiult the F145 in my 68.

 

[destin]

Gas cap on a 64 should be a non issue. Wasn't until around 71 when there sealed the cap. There is a small hole in the fill neck where the chain attaches that should let the tank vent vent. Have you double checked the spark and the timing?

When I have more time I we tell you my freeze plug story after I rebiult the F145 in my 68.

can the spark and timing jsut go out of wack in oine day?
It is all new, but maybe it did, new distributer cap rotors and wires etc.

What woudl cause this to suddenly be jacked? ( timing spark ) etc.

I want to solve this problem for once, not set the timing and replace the points every day if you know what i mean...

So shoudl i be assuming a fuel delivery / gunk problem or a spark timing problem?

Mechanic said he set timing advance 3 degrees if i recollect correctly

 

[destin]

so my tenative game plan is to clean the fuel system out today.

new fuel lines, clean the tank out ( air compressor i guess, no one posted back on the best way to clean that )

Going to run the truck from a clean gas can with a inline fuel pressure gauge and i will post later tonight with the results. Again, fuel bowl at the line site in the carb... stumble bumble missing when i pull the throttle ( I could see how this would seem like a timing points issue as posted above, but how can they be jacked in one day? )

So this is how i am gonna approach it in my limited knowledge, not a mechanic, but hell, new motor new everything, they cannot be much other issues yeah?


If after cleaning the fuel delivery bits and lines, it still exist, then what?

What would be causeing the points to fowl or timing to become wack? there has to be a source to this...
All this ghost in the machine crap is starting to piss me off

Thanks and please post up, i be checking but not posting from my shop via my mobile.

thanks!

 

[fj404life]

Did u pull the fuel line off the carb and crank the motor over to see if its pumping gas?

x2 on rigging up a temp gravity feed fuel tank to rule out the old stuff. (since you already have the line disconnected!)

3deg timing does not sound right...

Bad or missing condensor can screw your points up I believe.

We wont let you stuff it away in storage sorry man aint happening! Worse case Im gonna come up there and not leave till its running.
You in with the cascade cruisers or jefferson state guys at all? Surely there is some cruiser heads up there in puddletown that would be willing to come over and help troubleshoot with ya!?!? The more guys you get standing around your truck scratching their heads while drinking beer the quicker it will be fixed up!!!

 

[destin]

I am pretty sure it is pumping gas, as the fuel bowl stays full and to the line...

right?

 

[fj404life]

Then I sorta doubt its a fuel delivery problem...
Check all the easy stuff...timing, point gap, plugs, valve lash, intake leaks, etc...
I know it all should be ok...but who knows until you do it yourself.
Walk away for a couple days if ya gotta. But know we will get it sorted out.

 

[destin]

Then I sorta doubt its a fuel delivery problem...
Check all the easy stuff...timing, point gap, plugs, valve lash, intake leaks, etc...
I know it all should be ok...but who knows until you do it yourself.
Walk away for a couple days if ya gotta. But know we will get it sorted out.

hmm, well they set the timing point gaps and valves when he installed the engine, what would cuase all that to go to s*** in one day.

I need to find the source so i am not chasing my tail

gonna hit the the tank in the fuel lines, other wise i can figure out the next step

this is lame

thakns for helping