Rep Power: 0

Will run good after 20 or so minutes shut it off hot and try to start . Wont start spins over but wont fire. Let sit for a bit fires right up till u shut it off than no go till it cools down.
Changed main relay and fuel pump relay . Stillno go when its hot. Please help

 
Rep Power: 209

Any CEL codes? Air filter clean? Have you tried starting it with the gas pedal to the floor when the engine is at operating temp to rule out a fuel flooding issue? Are the spark plugs wet with gas, oil or coolant? Remove and check the spark plugs for wetness first.

Main suspects are:
TDC Sensor
ECT Sensor
A/F (air/fuel ratio) sensor

Whenever possible test first and replaceparts if needed. This read may help: https://mechanics.stackexchange.com/...start-when-hot

 
Rep Power: 0

No codes .or engine light on will the tdc fail after the car turns off or just when hot. I can let run for 2 or 3 hours outside and shut off and try to start nothin just spins off hold petal to floor might sound little different but no go let sit hour fires right up.. wtf will try temp sensor on weekend

 
Rep Power: 209

Read: https://www.civicforums.com/forums/1...placement.html

 
Rep Power: 0

Ok here we go 01 civic. Issue starts run fine till hot and u shut off than try to start no go. Wait 20 mins fires right back up. Changed fuel relay camshaft sensor temp sensor still no go

 
Rep Power: 0

I had a problem from brand new 7th Gen car with 1.7 motor.
After running for a while and stopping engine, say for gas it would crank but was hard to start.
Last year on really hot days the engine would just stop intermittently for no reason and after about 10 minutes I could start it normally again.
Eventually found the problem was the TDC Sensor failing with heat soak at garage or during really hot weather (>38deg C)
Old sensor had J5T23991 2509 PLC written on it.
I replaced it with 37840RJH006 Sensor from Honda which Supercedes J5T23991 2509 PLC
It was showing Fault Code P1361 when it was failed and hot.
Hope this helps.