1974 Hilux Starting and then Stalling... - Page 3 - Toyota Nation Forum : Toyota Car and Truck Forums
Pre-88 Toyota Pickup/Hilux Discussion area for the '88 and older Toyota Pickup/Hilux.

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post #31 of 33 Old 05-11-2019, 08:37 PM
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The low speed circuits have emulsion tubes where the air and fuel mix, you can use a blow gun with a line that extends it's reach and place the air flow just over the orifices where the fuel enters the venturi and use them to "purge" those orifices and sometimes get lucky and fix low speed fuel mixture issues. Do this with the timing light strobing the area and it makes it easy to see the vaporized fuel flowing out of the carburetor int the intake.
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post #32 of 33 Old 05-16-2019, 02:06 PM Thread Starter
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Hi old mechanic, sorry for the slow response. I’m not really getting what you mean. The issue still persists, seems to idle very low(too low) when I start it for the first time of the day. Then when I give it a little gas it nearly stalls if I take the clutch out as well. Is the idle adjustment too low? Could it be an issue with the fuel mixture screw? Carb?

Any more detail would be helpful, I feel like I’m close to getting it running well again. Could it still be a fuel pump issue?
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post #33 of 33 Old 05-16-2019, 10:33 PM
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Quote:
Originally Posted by Rassisland View Post
Hi old mechanic . . . not really getting what you mean . . . Is the idle adjustment too low? Could it be an issue with the fuel mixture screw? Carb? . . . Could it still be a fuel pump issue?
I think Old Mechanic was saying that clogged jets in the carb are a possibility, and he offered a (in my opinion) great tip on cleaning jets without having to remove and disassemble the carb. I wouldn't mess with the idle and mixture screws. They were set right, and changing them is not the way to deal with a clogged jet.

I apologize if we already covered this, but have you verified that your choke is working? A stuck choke would cause symptoms like you describe. Especially when the engine isn't fully warmed up.

As for the possibility of a bad fuel pump, i already outlined how to check for that using a pop bottle. As it happens, I needed to do this very thing on my Vespa last weekend, so I snapped this photo of my "IV Gas Bottle". Takes about ten minutes to make, and supplies gas to the carb independent of the fuel pump.



One thing that's not clear to me yet. Can you get this truck on the road at all? Driving a few miles - even performing badly - gets gas flowing through the carb. Sometimes that's enough to open a clogged jet.
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