03 2500 stock no mods. new filters new pick up pump on filter housing. truck cranks for 6-8 sec befor starting always starts runs great . no excessive or colord smoke from exhaust when it starts. should start in 2-5 sec any help out there would be very nice thank you

 

Where do you live? if temps below 35 degrees there is flash update to ECM for long crank time.
Possible PLV leaking
Vehicle Issue Hard start or no start. May have fault code P0148 , P0251. Fuel is flowing freely through the Pressure Limiting Valve during the Fuel Pressure Override test and/or while cranking the engine (if the engine will not start).
System or Component Hard Start, Long Crank Time,Engine Cranks;14-003-06;Group 14 - Fuel System,Group 18 - Vehicle Performance / Driveability;Yes - Intermittent,Yes - Continuously;Fuel Pressure Low
Recommendation The Pressure Limiting Valve will need to be replaced. There is also an updated ECM which should also be replaced (unless the ECM had been replaced prior with part number 05191829AA / R5191829AA or newer) to prevent repeat PLV failures. The service kit for a revised ECM and a PLV is P/N 68003886AA
Possible excessive return flow from injector, try tightening HPC nuts to spec first 37 ft lbs torque.

https://www.dieseltruckresource.com/....html?t=261063

 

i love it I live in flagstaff az 7000 ft average temp lately 18 to 33 at night day time high of 60 in the last week. thanks for remindeing it is still winter here

 

Thank You. very professional answer will seriously look in to this.
other then this i love my truck runs great 20 mpg on hwy

 

probably has a bad injector or 2...... my exact symptoms every time an injector goes bad. Has now happend 3 times since I have owned the truck.

 

your depressing truck runs fine, just takes longer to star like 4 to 6 sec cranking insead of 2-3

 

TSB for long crank time.

 

I just had a post on here very recently about longer crank times on my '06 2500 with 36k miles on it.
I have a really good dealer in the farm country of N. FL and took it in on Friday. They found no problems with anything and ruled out injectors, as well. All 6 of my injectors had already been replaced at 15k miles. They found that I needed 2 new batteries. They said that the batteries were only putting out a total of less than 600 cca's and should have around 1600 cca's.
I was skeptical, however, I let them put in the new batteries. Well, I can't believe how little the crank time is now upon start-up. A turn of the key and it fires right up! pcm
May not be your problem, but check the batteries. pcm

 

thank you for your thoughts i will check both of them in the morning thank you

 

what did ya end up doing on the hard start?

thanks