Hard to start

[rdsrover]

1995 gasoline D 1
Suddenly it won't start. Cranks fine, but it's like there is either no fuel, no spark or no air?
The outside air temp is currently about 32 F
If I put a heater under the engine for a couple hours, it starts instantly.
Any ideas?

[rdsrover]

I think I figured it out...
The temp sensor plug had come off from the sensor on the top of the engine.

1995 gasoline D 1
Suddenly it won't start. Cranks fine, but it's like there is either no fuel, no spark or no air?
The outside air temp is currently about 32 F
If I put a heater under the engine for a couple hours, it starts instantly.
Any ideas?