I have a 88 Toyota pickup that seems like it misfires when it gets to running temp and I've replaced the plugs and plug wires and it still does it. I also ran seafoam threw it and it didn't stop it so please lemme know some suggestions! Thanks.

 

Grab yourself a multimeter and test the Engine Coolant Temp (ECT) Sensor and the Throttle Position Sensor (TPS) per the Factory Service Manual. These are the most common culprits for poor idle when the engine is warm. You might also want to check for vacuum leaks by spraying carb cleaner at the connections of all the gaskets and vacuum hoses. Any change in idle indicates a leak.

 

Alright thanks ill try that