3SFE wont restart

[highwayman1956]

I have a 86' ST162R with a 3SFE motor. I can generally start the motor when it is cold and it drives well. Once I stop the motor, it will not start again sometimes for 3 to 24 hours. I have checked the fuel at the filter and it has plenty of fuel and pressure. It has spark (varying strength). I have changed the coil, plugs and rotor. Does anyone have any suggestions please.

[highwayman1956]

still at a loss with it, but.... I have found that the idle control valve under the throttle body makes a buzzing noise for a short time when the engine wont start and is silent when it will start. I have found that by pushing the ICV plug off and on a few times the buzzing will stop and the engine will start. I have cleaned the ICV out as it was siezed with carbon. I have checked the engine fault codes and it has only one code showing which is 11. can anyone peace this together???

[ChevelleSSLS6]

I wonder if you could get it to idle nice if you could pull the connector and the IAC would keep the engine idleing at the right engine speed... I wouldn't expect it to start without a litte throttle (while cranking) and while the engine warms up. Maybe it'll work...

[Doctor J]

Buzzing sound is normal. Code 11 is for power interruption to the computer. Check EFI relay wiring and connectors.

[Pineapple]

I had that for a while, it was my rusty coil. Car won't start when coil is hot.