Help. Some kinda fuel issue? 93 SJ

T

twentythreemx

Location
cleveland, oh
hey guys, can someone point me in the right direction? I’ve done a lot of searching and think I’ve tried a lot of suggested things but I’m still not sure what to do and here’s my issue and what I’ve noticed:

It ran fine. Sat for about a year and now it will start and run for a little while then die out, with the air filter off. Put it back on and it dies real fast.

There is a primer installed to the reserve line. However it doesn’t seem to be sucking much fuel out. Barley sprays anything at all, few drops. Sometimes it will randomly suck a bunch in but it’s rare. Seems like some kinda red flag that that’s not working?

I have blown out all fuel lines. Made sure they have good tight zip ties on everything. The water separator is empty (pulled bottom plug. Oring is in tact). Everything is routed and hooked up correctly. I did pull apart the carb or at least a little bit, the first cover at least. Main filter was kind of dirty. Clean now. Cleaned fuel selector. New plugs and battery. Check valve seems to be working fine.


I read to pull the hose after the check valve and blow into the tank and the filter should fill with fuel.. blowing into the tank it does not fill the filter, instead fuel seeps out of the on or reserve line at the rubber mount on the tank. Forget which one. Is that normal or should it fill the filter? If it should and it’s not, what’s that telling me?

Outside of new lines and a carb rebuild I’m not sure what else to do and I really don’t wanna tear into the carb.

Oh I did pull the pulse line off the carb and verify I’m getting strong burst of air from there

Anything else I can check to narrow down the issue?
 
T

twentythreemx

Location
cleveland, oh
Also I should add, it doesn’t happily start and do this every time. Sometimes I’ve had to dump some fuel into the it to get it started and sometimes when it randomly does squirt some fuel in from the primer it’ll start. Otherwise it’s a PITA to get started at all.
 
SuperJet-Dave

SuperJet-Dave

Location
Rochester, NY
Did you try removing the in-line fuel filter and see if the problem changes? I know you said you cleaned the fuel filter, but I have had a new fuel filter be a problem before.
Also a carb rebuild or at least a take apart and clean (especially checking the small basket fuel filter).
Good luck
 
T

twentythreemx

Location
cleveland, oh
yes I removed the inline filter, no change. anyways i found a couple of issues..

1. the fuel pickup, the metal hoses..someone must have bent them or something and then bent them back, IDK but there was small pin holes in them causing fuel to leak out, the tank wouldn't keep pressure. Also found a fuel line that had a small crack in it and also leaking some fuel out, again, not helping the pressure issue.

So I swapped over another fuel pickup, progress.. it will start a little easier now, the primer works 100% as it should now as well, imagine that... It seems if I cover the carb w/ my hand and block any air form coming in, it starts up and will idle just fine.. as soon as I remove my hand and either leave it open or put the air filter on it dies..

So, is that an air leak? Maybe at the base of the carbs or something from me pulling them off and reusing the same gasket? My issue was probably the tank pressure from the get go, kind of regretting pulling the carb off at all now who knows what I messed up doing that lol.
 
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