Last week, when the temps here got colder than usual (low 30s) the IP (or something near the IP) started leaking fuel onto the valley pan/starter/ground. Now that the temps are back to normal (50s) it has stopped leaking.

The engine always starts and runs fine, so there's no air in the system. Also, it leaked worse after sitting for several days without running, so the leak isn't related to fuel pressure either. I'm really confused, anyone have a story?

Took some pics of the IP as best I could. Good thing to have the doghouse sometimes!

 

Might be a loose hose or injector line.

 

if he had a loose injector line his idle would be affected wouldn't it?

 

If it stopped leaking when the temps warmed up, I imagine it would be one of your injector o-rings. The rubber can get hard when it's cold and not seal as well.