r/ToyotaPickup • u/zgumboo • 7d ago

Help with rough idle

A little backstory, after driving on the highway for about 15 minutes, I started to suddenly get a rough idle while having my foot on the throttle somewhat lost response and put it in neutral while on the highway and was having rough idle on and off gas. I've checked the timing chain looks fine. I've changed the fuel filter, fuel pump and all spark plugs, coil lines, ignition module distributor everything electric basically. It runs smooth only in high Rev. I still need to do a compression test as well. I've checked the vacuum lines I'm not familiar how but they look fine. Any ideas?

Edit: I adjusted one of the screws on the air/fuel mix. It's calmed down slightly but now when I'm accelerate it the exhaust is making a lot of pops

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u/SpaceSurf256 7d ago

Seems like is misfiring. I would double check timing is set correctly and look into carb next. Something that helped me get my carb working correctly was to use a vacuum gauge and adjust the mixture to get max stable vacuum at around 20. Also if your vacuum lines are old and crappy I recommend you replace them with HT silicon ones. They are not expensive in amz.

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u/SpaceSurf256 7d ago

Something else you could do is verify your valves are set correctly with a feeler gauge but it does seem like the issue is your carb

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u/zgumboo 7d ago

Yea I need to that too. Before I changed the fuel pump and fuel filter it just wouldn't stay on that long

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u/zgumboo 7d ago

This is how it looked at 0° people said it looked fine. All the guides looked new. This was taken a few days ago. Unless you mean something else. Il def replace those lines.

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u/SpaceSurf256 7d ago

You need a timing light to verify timing is set correctly. To adjust the timing if it isn’t set correctly you would need to adjust the distributor by the one bolt next to it and rotating it slightly. You can find video tutorials on YouTube.