CheapXJ Posted January 20, 2019 Share Posted January 20, 2019 realistically the regulator is built into the throttle body on a 2.5 so I should just have "excessive" return flow right? there will probably be a complete 4.0 swap by 2020 as i'm kinda over this gutless turd of an engine but right now it just needs to go back to moving under its own power. i can hear the pump running, took the line off before the filter and it doesn't even gravity feed. NOTHING comes out even with pump running. thinking about hookin up the vacuum pump in hopes that the check valve is just stuck really hard and inhibiting priming. tank is full to the point of overflowing so that's not the issue, I also gotta drain some before I pop out the sending unit... Thoughts? Link to comment Share on other sites More sharing options...
gogmorgo Posted January 21, 2019 Share Posted January 21, 2019 There's a small chunk of rubber line between the pump and the tank outlet that can deteriorate. Ethanol gas isn't always great for some older rubbers. If the pump sounds like it's running strong and you don't even have a trickle, that's what my guess would be, especially if it happened instantly, and didn't just start gradually leaning out. Link to comment Share on other sites More sharing options...
cruiser54 Posted January 22, 2019 Share Posted January 22, 2019 Link to comment Share on other sites More sharing options...
mjeff87 Posted January 22, 2019 Share Posted January 22, 2019 I'll second (or third) that^^^^ That rubber line turns into swiss cheese and you gradually lose pressure, until it breaks. Then you have zero pressure (but can still hear the pump running, so you don't think it's a pump issue). Been there, done that, got the tee shirt. LOL. Link to comment Share on other sites More sharing options...
CheapXJ Posted January 22, 2019 Author Share Posted January 22, 2019 still trying to get this thing drained but i'm gonna be pissed if that's the cause. the hose, pump and strainer are only 18months old and it has only seen 90 octane ethanol-free boat gas since I dropped the TJ 2.5 in it. still won't let anything in or out of the fuel line, which leads me to believe the hose is intact (if it blew out, it should pass compressed air, and it doesn't) I parked it last july and it hadn't moved since. hose was not exposed... I took every damn precaution to make sure this didn't happen. it's an offbrand pump and it was fairly loud when it worked. I gotta use a stethoscope just to hear it "run" now so i'm fairly certain the pump is the problem. Link to comment Share on other sites More sharing options...
Pete M Posted January 26, 2019 Share Posted January 26, 2019 you wouldn't be the first to have a new pump fail. apparently china just hasn't learned how to make a fuel pump. Link to comment Share on other sites More sharing options...
CheapXJ Posted February 3, 2019 Author Share Posted February 3, 2019 So the check valve in the pump got stuck... Took it out, smacked it on the ground and threw it back in, problem solved! Love that it sounds like a pissed off tractor Link to comment Share on other sites More sharing options...
Pete M Posted February 3, 2019 Share Posted February 3, 2019 it's good to know that violence still works Link to comment Share on other sites More sharing options...
CheapXJ Posted February 3, 2019 Author Share Posted February 3, 2019 8 hours ago, Pete M said: it's good to know that violence still works Bro, whoever said "violence doesn't solve any problems" must have never tried it... Now if this idle servo would just respond to the same stimuli... Link to comment Share on other sites More sharing options...
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