E350 RWD Won't start when cold
 

My E350 won't start when cold. It cranks, but won't start. It takes few tries and then it starts. When the car is warm it starts with no problems whatsoever. I changed a crank sensor, but the problem is still there. Does anyone know what this could be?

Thanks!

try a new temp sensor. It appears that might be causing a the fuel injection to run lean as if the engine were warm. It may or may not affect your temp guage, there might be 2 different sensors, one for fuel delivery and other for temp guage. It might be worth to purchase a 1 year subscription to alldatadiy.com Its very cheap, and can provide some good leads.

Cold Start Problem (PZEV vehicle)
 

I just cameback from my mechanic and after a series of tests he concluded that the there is a low fuel pressure. Car still barely starts when its cold. My question is....is only the fuel pump responsible for a low fuel pressure or it could be something else that makes fuel pressure to drop?

Thank you in advance.

p.s. it is a bas 2007 E350 PZEV car(from CA)