2005 Toyota Sienna
Car is hard to start after sitting overnight. Once started it runs fine - does not hesitate at all.
The starting is getting gradually worse each day - today it took 20 cranks to start
When I turn the key to on (but not crank) I do not hear the fuel pump hum - that makes me think the relay or supporting fuses are bad - I swapped with Horn relay and no difference.
My key symptom that I cant figure out is the fact that has gotten gradually worse over 2 months. From 2 extra cranks to fire up to now 20 cranks.
Could it just be the filter?
Once again it runs fine once started and startup all day long and run fine all day long. Just a problem after sitting overnight.
Lead me to think check valve problem, but why would that get gradually worse?
Any help on what I can rule out and best course of action?