Long engine crank before firing
Looking for some help!
After searching thru the threads for months, I have not been able to find any threads about a problem I'm having with my 06 3.7L (QT1).
When starting, the engine cranks and cranks (between 7 to 10 seconds) before it fires. Long enough that anytime anybody is around or in the car with me, they always point it out. It has been doing this for over 4 years now and about 80k. While it was under warranty (about 31k) I took it to the dealer and they were not able to find a problem.
Despite the long crank time, it has never failed to start, and when it runs, it runs fine.
Also it only has this long crank time when I haven't driven it for over 4 hours or so. The engine will fire much more quickly when it have been driven recently. That's why the dealer cannot ever find a problem. (Leads me to believe that possibly the fuel pump loses its prime over time and the engine needs to crank longer for the fuel pump to re-prime and send the fuel, but that is an uneducated guess only!)
A couple things to note:
-current mileage is 110,000
-on the original battery (not sure if an aging battery could contribute to this)
-PCM and ESM replaced recently (original units failed)
-I'm religious to all maintenance intervals
Any help would be very much appreciated! I'm clueless and cannot seem to find answers elsewhere