96 toyota 4 runner won't run

runs like it's missing
Have scanned for trouble codes, could be dirt in a fuel injector or a weak/bad coil.

Probably a stuck injector. It could be the engine computer is getting a bad signal from the MAP sensor, too. Run a diagnostic test to verify.

As with any no start issue, you will need to check for spark and fuel pressure when it won't start to know how to proceed.

The cylinder compression should be around 160-185psi.

images for 1998 toyota 4 runner fuel pump cut-off switch

Clean all three battery connectors and replace bolts

Couple of thoughts if you are sure it is spraying to much gas... Have you checked the fuel pressure? If the regulator it bad, pressure may be to high, that would cause it to run rich/spray to much gas. Sometimes a bad temp sensor can cause it also, if computer thinks a hot engine is cold due to bad sensor, it will run rich. Way outside the box is... have you checked Alternator voltage? With engine running, check voltage at Battery, it should not be much over 14.5, if it is way high, it screws everything up. I have never seen a TPS cause the problem.

check mass air flow sensor

the batt light and engine light will come on if engine is not running