1999 Ram 5.2

Engine cranks fine
But when first started wont start (Cant hear fuel pump cycle ) turn off key then back on (this time fuel pump cycles ) and starts but little rough then smooths out and runs fine? any ideas ? Thanks !!

 

Might be time for a tune up...pull the plugs and cap. Look to see if there corroded. I've heard good things about Napa brand cap and rotors.

 

Sorry forgot to add already replaced Cap, Rotor , Plugs , Wires and a new Coil.

 

Did you buy the "house brand" or "premium brand"? Could be a weak battery? You can have that checked for free at your local parts store (usually). Recheck all your work and make sure your connections are snug. Just a thought, but you could also run some sea foam in your gas tank to clean out your fuel system. I noticed that you changed your coil. What happened to your old one that made you change it? Also, try doing a search for this topic. It'll give you some good places to start. My brain's to fried to think right now (lack of sleep). Gotta catch some Z's now.

 

Premium , did dealership parts for too long , you get what you pay for ! Battery is good new as OEM finally got weak .
Coil was replaced with new Because 1 had a new on in my tool box 2 miles and years still had OEM and 3 tensioner went out and well had to remove coil anyway so replaced with new .
Tried a search but nothing that i could find anyway get some sleep and thanks tommorrows another day .

 

Check fuel pressure at cold start up. See what it does. If the fuel pump doesn't prime on the first shot, you WILL have long crank times.