Hello I have a 2001 Civic LX with 180,000 miles that will take a good 15-20 seconds of constant cranking to start every morning. After started it runs fine and will start again like normal unless it cools down for 4 hours or so. It all seemed to happen right after I replaced the cam timing sensor. I have also replaced the EGR. There is no check engine light and I have taken it to two different mechanics who have not been able to figure it out.

any guidance would be much appreciated.