I have a 1994 Integra LS, AT.
Will start but dies after about 45 minutes.
When it dies there is NO spark.
Fuel pump is working fine.
What has been replaced: plugs, plug wires, disributer (2X), battery, main relay, fuel filter, injectors, and ECM. Have cleaned the Ignition switch.

Have no idea where to look next. Once the car cools down it will start and run fine...for about 40 - 45 minutes.

Any thoughts? Im stuck

 

how do you know there is no spark? did you test it? try checking your tps

 

No spark...did check it.I used the spark tool between the plug and wire with the light. Blimks a way while running. Then nothing after quiting. Fuel pump comes on...just no spark until it cools down.

 

I'd point the finger at Humidity!
After 45 minutes of operation, rising temperatures are being accompanied by humidity. As the humidity seeps into the distributor through, possibly, bad seals, it begins to take effect on the electrical components. Allowing the engine to cool down allows humidity levels to be restored to "normal" and thus allowing your car to be re-started.

I have similar problems as well. My car will run indefinitely, however, if i switch it off, and attempt a re-start, it will take about 3 minutes before I could do so.

Also, when moving my car into humid enviroments, like from cold outside to warm garage, I have to wait almost a half hour before a re-start is possible.