Why won't the 1995 4 runner keep running It will start and run for 1-2 seconds then shuts down Fuses and Relays seem to be working Fuel pump works when tested but have not tested for psi?

Answer 1

You should make sure that the plug that goes to the airflow meter (between the air filter box and throttle body) is properly installed. It sounds like this has been left unplugged because after the initial operation of the fuel pump (that happens when you turn the key to "start") there is a switch in the airflow meter that closes and allows current to continue to flow to the fuel pump as long as there is air passing through it(i.e. the engine is running). If this does not happen the exact symptom you describe will be the result. PLUG IT BACK IN! This is a copy of my answer from the "What would cause a 4Runner to start cold but not when warmed up?" question in the 4Runner section: It could be a crack or hole in the air intake hose. Look in between the MAF and the throttle body. When there is a tear in the hose, the MAF gets all out of whack and will start when the motor is cold, but will die when it gets warm. Another symptom is if the motor is warm and you try to start it, it will start fine, but will not idle and will die very quickly. If you do find a tear or hole, all it takes to repair it is some electrical tape to seal the hole.