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Hi, I'm new here and cant seem to find any forums on my issue. I have a 2006 civic lx manual trans. It's the 1.8 r18 engine. The car will always crank over but will not start all the time. If it doesn't start right away it won't no matter how long I crank it for. I turn the key back to off then try again and when it does start its immediate. Sometimes it takes 1 try other times it takes upwards of 5. I think it's some sort of weird electrical problem. It's also seemed to lose bottom end power. I've replaced the fuel pump, basic tune up, checked valves... but nothing is helping. It did have a broken lost motion spring and after replacing that it still does the same thing. Does anyone know what kind of sensor or wiring that could cause this? Thank you!

 
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I forgot to mention theirs no check engine light... making it super hard to figure out.