Cheesy64

I have a 1990 toyota 22re just built the 3rd motor for it it's my mud toy it has no vacuum leaks no intake leaks but when the motor is not hot it will idle fine then when it starts to warm up it won't idle when u give it gas it dies out if u let out of it it will come back unless it has got warm an won't idle anymore the mass air flow sensor is good the fuel pump is good an has new spark plugs wires distributor distrib cap an rotary button an new fuel filter it's really agrivatin an I would be very interested in y'all's opinions on it this is the first time I have never been able to figure something out