Stubborn toyota doenst like to start or idle
06-13-2014, 11:12 AM
#22
Make sure none of your fuel lines are contacting any hot engine surfaces and they are routed as to allow ample space between them and hot surfaces.
I would suggest ruling out other possibilities first after making sure your fuel lines aren't in close proximity to anything especially hot.
I would suggest ruling out other possibilities first after making sure your fuel lines aren't in close proximity to anything especially hot.
06-17-2014, 04:04 PM
#24
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So I've played with timing the past few days, tried advancing it and retarding it but doesn't change how it starts. When it's cold I can get it to fire right up. But after it's hot. If i shut it off and try to start it again in a few minutes it just cranks and cranks. I can usually get it started after a fee minutes and pumping the gas or holding the gas down. Timing is at 5 degrees... I need help! I'm going crazy.
06-17-2014, 04:45 PM
#28
Yes and what is 'fine?' How's the electrode look? Excessive wear? Any soot? Are they as clean as new? Tan?
If they look white you're probably lean. Tan, you're probably about where you need to be. Black is rich. Let the truck idle ten or more minutes (fully warmed up at operating temp) and look at a couple. If there is zero color it's a good indicator you're probably too lean given the issues you're having.
If they look white you're probably lean. Tan, you're probably about where you need to be. Black is rich. Let the truck idle ten or more minutes (fully warmed up at operating temp) and look at a couple. If there is zero color it's a good indicator you're probably too lean given the issues you're having.
06-18-2014, 07:39 AM
#29
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The electrode looked normal to me, and they were tan in color. I'll let it idle for a bit and pull the plugs and take a look. Hopefully it's just lean.
But I have it idling fine now. It just won't start when hot.
But I have it idling fine now. It just won't start when hot.
06-18-2014, 09:20 AM
#30
They should be tan. Still could be a little lean but Probably not enough to make it start so hard. Look down the carb after letting it idle while it's hot and see if you notice any raw fuel dripping down the venturi's.
When are you getting the jet kit? Top priority ought to be jetting that idle circuit and getting it to run well between 1-2 turns out on the idle mixture screw.
When are you getting the jet kit? Top priority ought to be jetting that idle circuit and getting it to run well between 1-2 turns out on the idle mixture screw.
06-18-2014, 02:33 PM
#35
Yes, if the mixture screw is out more than two turns you need to go up a size. You're going to have to play around with the jets a bit to find that sweet spot. Ideal is 1.5 turns out but this isn't a perfect world.
In turn, if it idles best under 1 turn out, you're jets are too rich and you must go down a size.
The way a Weber idle circuit works is that by loosening the mixture screw you are creating a richer running environment. Not all carbs work exactly the same, but this is how a Weber works.
Screw in = leaner. Screw out = richer. You don't want the screw too loose or too tight, so now you get to experiment with the different jet sizes until the truck runs good with that mixture screw set right.
You only tune when an engine is at operating temp. Don't play with mixture settings and jets on a cold motor.
In turn, if it idles best under 1 turn out, you're jets are too rich and you must go down a size.
The way a Weber idle circuit works is that by loosening the mixture screw you are creating a richer running environment. Not all carbs work exactly the same, but this is how a Weber works.
Screw in = leaner. Screw out = richer. You don't want the screw too loose or too tight, so now you get to experiment with the different jet sizes until the truck runs good with that mixture screw set right.
You only tune when an engine is at operating temp. Don't play with mixture settings and jets on a cold motor.
06-18-2014, 02:39 PM
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Thanks you very much! That's going to be a big help. But do you think that could be causing the hard start only when it's hot? I mean I probably have 3k plus miles on the carb and it just starting being a major PITA recently..
06-18-2014, 02:44 PM
#38
Go through the carb tuning procedures and play around with your choke. If you can't seem to get a handle on it after getting your carb setup properly post again.
Your fuel pump could be a cuplrit depending on how it's hooked up. In any case, you fiddling with your carb will give me some time to think about this more. In the meantime, if you solve it let me know.
Your fuel pump could be a cuplrit depending on how it's hooked up. In any case, you fiddling with your carb will give me some time to think about this more. In the meantime, if you solve it let me know.
06-19-2014, 05:56 PM
#39
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Well I spent all day after work playing with it, put another new fuel pump on, I know it's wired in correctly. And I played with the choke and mixture screw for hours. And my grandpa is at a loss too. He's tuned plenty of carbs... When I first got the carb there was no problems.. And it was turned perfectly. And I never screwed with it. I think I'm going to make an appointment to take it in to a shop..
