Hi guys,
I will start with a little bit of background but I'll (try to) keep it short. I'm working on a pickup that someone else started and as far as I can tell was not very mechanically inclined. I'm pretty good with a wrench, but this is my first Toyota so I'm kinda lost in some respects. This truck was in pretty bad shape when I got a hold of it but I was promised that the motor was in good shape. The rest however was hammered. I have just about built a new one from scratch at this point. I finally finished replacing all the suspension, rebuilt the solid axle, the steering components, brakes, interior , front half of the frame rails, etc. Went to fire it up finally - nothing, I check the stick and its full of fuel so I kitted the carb, replaced the fuel pump, and changed the oil. I fire it up again, adjust the idle and set the timing and thought I was good. I come back in the morning to a big puddle under it. Bottom end full of fuel again- another oil change, adjust the float, run it a minute then shut her down. Next morning same thing! If I didn't have so much time and money in this thing now, I would set fire to it and walk away-Most frustrating thing I've ever run across. What am I missing? Did they swap a line somewhere when they dropped that motor in it ? I can't find anything wrong anywhere. So much for keeping it short, LOL

If any of you guys that are more familiar with yotas have dealt with this before or just have a guess at what I'm not seeing I would really appreciate your input. Thanks in advance.

 

Do you have a picture of where the fuel lines are hooked up?

Did you install the spacer that goes between the fuel pump and head?

 

Thanks for the response. Yes I do have the spacer installed correctly, and no I haven't taken a pic of the fuel lines. But since there are only two of them, (besides the one going to the carb that is to short to go anywhere else) the inlet, and the outlet I would think that if those were reversed it would not pick up fuel seeing as how only one reaches the bottom of the tank, right? What I can't understand is how fuel is getting up from the tank to the engine in the first place. It doesn't have an electric pump in the tank, just a mechanical pump. So how is it getting there? My son told me that I don't need a mechanic, I need a physicist because it defies the laws of physics. Maybe so but that doesn't change the fact that it keeps doing it. I'm on my 6th oil change and I haven't even driven it yet.

 

Well, I poked around on it a little more last night and noticed that the charcoal canisters, and the resonator are full of fuel also. Anyone know what could cause that? I can't be the only one that this has ever happened to. It seems to start and run just fine and the float level stays right at the bottom mark of the sight glass (I intentionally set low it just to be safe) but made no difference. I have a full years worth of work in this chassis and my normal daily ride is down so i really really need this thing to run. I'm out of money and out of ideas.

 

You might have the fuel tank vent and return lines reversed.

Instead of fuel vapor going to the charcoal Canister, you are probably dumping the return line into the charcoal Canister.

The raw fuel is probably getting pushed in from the charcoal Canister Into the vacuum line, flooding the engine. There may be other possibilities, but that is the most likely one.

 

Thanks for the suggestion, that makes sense. I will check it out right now. I noticed while I was doing the brakes that the previous owner had changed the iin line fuel filter, and It looked like the lines with it. The routing from there forward was correct but I guess I will have to drop the tank and see what's what. A side question: Would the canisters, or the cat have been damaged by this or will simply draining them suffice?

 

Sorry if it seemed like I abandoned the thread, I've just been busy the last couple of days. My findings after dropping the tank: Not what I had expected because every manual that I have seen shows a layout unlike this one. With the absence of an available '84 manual I've referring to the '85 which shows all three lines running to the same location whereas these are two up front, and one in rear. Hopefully someone familiar with the '84 will see this and be kind enough to verify this, but I'm assuming that the two near the front are pressure/return and the rear is vent? Whoever's work I've been having to redo got the bright idea to epoxy the access plates into it (the tank) so I'm hoping that part is at least correct. That rear line goes to what looks like a white check valve, and then continues up the frame rail to the intake manifold. the other two run to steel lines up the fire wall. One to the fuel pump, the other to first charcoal canister. I am sorry I do not have pics, but my phone cord will charge the phone but would not let me send anything through it to the computer. I will get new one as soon as I get a chance. As i said I haven't had any luck finding a manual that shows proper routing for '84 so if anyone knows please help a brother out!

 

Not sure if I should have started a new thread for this question or not (I'm not overly familiar with forum etiquette),but can someone tell me where the bottom hose of each of the evap canisters go? I have 3 different shop manuals now and none of the diagrams show where they go. They show where the the hoses coming off the top are routed but not the bottom ones. I thought may they were just either a drain possibly or vent, but they do mention in the list of things to check that there is a hose connected just not where they go.