Question about 1986 Toyota Pickup 4WD

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My carb on my toy 86 pickup is not getting gas when I press on the pedal. the acceleartion pump seems to be pumping OK, but no gas is coming thru the line that squirts into the carberator chamber. I can see the gas in the window of the carb and the fuel pump works fine. any ideas? The truck runs if I have someone pouring fluid into the carb, but when they stop the truck stops. thanks.

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  • Mike Apr 30, 2011

    don't laugh, i'm back at it again. I took the accelerator pump off and it looks fine. under the pump are two holes, one larger than the other hole. the smaller hole on the left seems like its function is to carry gas to the carb. it seems like the accel pump sucks the gas from the hole on the right. unfortunately i cannot seem to draw any gas out of that hole. i tried using a syringe to create the same pressure to draw gas out of the hole, but nothing. I tried to take the top of the carb off to look inside, although can't seem to figure out how to get it off. One question i have is this. Am i correct in assuming that the two holes that I found under the accel pump are used to draw fuel from the fuel line that comes into the carb and the other hole is to spray it out into the carb chamber to burn? If that is correct, any ideas on how i can clean out the hole where the gas should be coming out? thanks.

  • Mike Apr 30, 2011

    Thanks for the help and suggestions. I hooked up a vacuum to a small tube and tried to draw gas out of the little whole behind the accel pump. no luck. I used lots of cleaner and WD-40 (which the straw from the WD-40 can fits perfectly into the small hole where I think the gas comes out). i might buy a can of compressed air tomorrow, but it seems like if the vac didn't **** it out i don't know what will. yikes ! time to trash it

  • Mike Nov 12, 2012

    I must be missing something. Someone can stand over the carb and keep spraying fluid into it and the truck will stay running. As soon as they stop, the truck stops. When I press the gas pedal, gas is pumped into the carb, but the truck won't stay running. I checked for vac leaks, it gets spark, timing seems OK. I cleaned the carb a few times, put a new fuel filter on, drained the tank & filled it with new gas. Any other ideas.


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Something is clogged. Recommend rebuilding the carb. The rebuild kits usually come with instructions--enough to get you thru if you are handy. Or, you could just take the cover off the float bowl right there on the engine and see if you can find the clog. Especially check the jet(s) in the bottom of the bowl. Any more questions--let us know.

Posted on Oct 04, 2010

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  • Mike Nov 13, 2010

    Is there an easy route or something else to check before I go professsional? Could I have one of my vaccum tubes hooked up incorrectly? Thanks.

  • Jeff Turcotte
    Jeff Turcotte Nov 13, 2010

    there isn't anything outside the carb that will keep the fuel from flowing once it's in the float bowl. My guess is you had some contamination that clogged up the carb. Or, your accel pump diaphram may have ripped. You have to take it apart to clean it or replace the rubber parts. If you're concerned about doing it yourself, get a manual and go carefully step by step. I can help if you get stuck. You may even be able to fix it right on the car, depending on what is clogging it and how bad it is. I can take a carb off the car and have it apart in less than an hour. The hard part is cleaning it up. You need to shoot carb cleaner thru the passages and sometimes use a paperclip to unclog.

  • Mike Apr 30, 2011

    don't laugh, but i'm back at it again. winter is over! i took the accel pump off and see that there are two holes in the chamber. one is bigger than the other one. from what i can tell it seems like the bigger hole is where gas is drawn in by the pump and the smaller hole is where the gas it pushed out. the small hole ends up as a spray in the chamber of the carb. that hole seems to be clear. Although if I am correct about gas coming in from the larger hole, i can't spray anything into the hold or draw anything out. Am I correct in assuming that the big hole is where the gas is drawn out by the accel pump? if so, then what other ways can i use to get the hole cleared out? I tried to take the top of the carb off to get into the chamber above the accel pump, but i couldn't get the top off after taking the 4 screws off, so i stopped there. thanks for the help.

  • Jeff Turcotte
    Jeff Turcotte Apr 30, 2011

    Usually the pump draws gas from the float bowl and pumps it thru a tiny passage out the little tubes near the top of the venturis. You need a really thin wire to push thru those passages or else try air pressure. Attack it from both ends, 'cause the clog may be at the venturis. Use lots of carb cleaner too to loosen whatever might be in there.

  • Jeff Turcotte
    Jeff Turcotte Apr 30, 2011

    To get the lid off the float bowl, you may need to manipulate any linkages that pass up thru it--like maybe the choke linkage. You can bend them if you need to, but remember what they looked like so you can bend them back.

  • Mike Apr 30, 2011

    thanks for the help and ideas. I used a straw from a WD-40 can and hooked it up to a vac. I tried to **** out whatever might be in ther hole, but still no gas will come through. I used lots of cleaner and WD-40 (which the straw from that can fits perfectly in the small hole where I think the gas should be coming out). I tried using small wire, but could only go in so far and then i hit a wall or something and the wire won't go any further. maybe the hole takes a turn. time to junk the truck ?

  • Jeff Turcotte
    Jeff Turcotte Apr 30, 2011

    I'm pretty sure you can get a rebuilt carb if you can't get this one to work.


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