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I have had this problem since I bought the truck 6 months ago. After it has been sitting for about 20 minutes or longer when I go to start it the truck has to crank for a few seconds before it finally starts, however when I first start it in the morning it does not crank for a long time. I have already replaced the fuel pump. Left it with a mechanic at the dealership I work at for awhile and he ruled out any fuel problems. So any ideas as to what else it could be? Replaced plugs, wires, cap, rotor, and IAC valve already as well. Any ideas would be greatly appreciated before I bite the bullet and take it to a Dodge dealership.
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Compression test it maybe? wouldn’t hurt but i suppose that would cause it to miss or some other kind of symptom if your compression was low
If the vehicle runs fine after you get it started, it does sound like a bad fuel pump check valve, leaking fuel injector(s) or a problem with the fuel pressure regulator…. I would hook up a fuel pressure tester, run the vehicle and turn off the vehicle and check back later and see how much the pressure has dropped.. If your tech just checked fuel pressure with it running, he might not have noticed this….The fuel pump probably is still delivering the proper fuel pressure…
Your type of issue happens when the check valve goes bad or fuel injectors leak and the fuel pressure does not hold after you have shut off your vehicle…. So your vehicle is having to “re-prime” so to speak the line from the tank to the engine… Thus why it takes a while to start the vehicle, no (or little) fuel is getting to the engine..
Here is a good writeup
http://www.motor.com/article.asp?article_ID=667
If fuel truly isn’t an issue, I would look at the secondary ignition system. Some vehicles had coil issues (they would crack) and cause problems on warm or hot starts…
-Karl
I’ll add one more thing here. I don’t know about Dodge but I know some GM’s won’t enable the fuel pump unless the computer sees some oil pressure during cranking. This is a measure of ‘self preservation’ that was engineered into some vehicles. As I said, I don’t know how the system works with your vehicle but if this is the case you might want to check your oil pressure as well as the fuel pressure when you start the vehicle to see if you have both during cranking.
Keep us posted.
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