"The Fuel level only gets to about 1/2 way."
what r u referring to?
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per book, (should be app for all carbbed 20R&22R trucks)
check, choke, needle valve (in float bowl), fuel cut off valve not open, filters, fuel pressure low.
it would be a benefit to you if you stated the year.
my guess is this manual, it's a FREE factory shop manual dl. carb trouble shooting starts on pg 293,
http://www.ncttora.com/fsm/87-4Runne...4runner_88.pdf
if that's not yours, here's the parent pg for the rest of the factory shop manuals.
http://www.ncttora.com/fsm/
cheers!
owner 93 hilux 4x4