Extended cranking time

[mdriver]

I have a 2000 wrangler sport with 4.0 engine. During starting, when cold and sometimes after running, it will turn over 4-5 seconds before starting. I read messages on this site with similar problems. I have replaced fuel pump twice (with fuel pressure regulator check valve), spark plugs, starter, battery, cam positioning sensor, crank positioning sensor. Any help would be much appreciated.

 

[PJOJeep]

Could the fuel injectors be plugged?

 

[TJ4Jim]

Typically a long start is caused by leak down thru the fuel pump assembly but a leaky injector can bleed pressure also. What brand fuel pump assembly did you use.

 

[801 Driver]

Have you tried turning the switch to ON a couple seconds before hitting the starter and seeing if it gives the pump time to pressure up for a quicker start? My 98 starts quicker doing that. It's not bad enough for me to need to track down at the present time. I have a 2000 Dodge Dakota that sits a lot works the same way.

 

[Chris]

Typically a long start is caused by leak down thru the fuel pump assembly but a leaky injector can bleed pressure also. What brand fuel pump assembly did you use.

X2 to this

 

[U8MYDZT]

Have you tried turning the switch to ON a couple seconds before hitting the starter and seeing if it gives the pump time to pressure up for a quicker start? My 98 starts quicker doing that. It's not bad enough for me to need to track down at the present time. I have a 2000 Dodge Dakota that sits a lot works the same way.

X2 on this. I tried spark plugs, wires, cleaned the intake and throttle body, new crank sensor and the only thing that works to get a faster start is waiting for the third beep after the key is turned and then turning in over. Starts almost immediately everytime.

X2 to this

X3

 

[mdriver]

Thank you for the recommendations. It was fuel injector leaking down. Thank you all for the help.

 

[U8MYDZT]

Thank you for the recommendations. It was fuel injector leaking down. Thank you all for the help.

Thanks for the update. Just out of curiosity, what was the test for this?

 

[CharlesHS]

You can pull your spark plugs and see if they are wet....
That will determine which one(s) is/are leaking.

 

[Byhumba]

Thank you for the recommendations. It was fuel injector leaking down. Thank you all for the help.

Can you share what the fix for this was? Part numbers would be great as well. Thx in advance.

 

[801 Driver]

Just as a little note here because I have 4 different kinds of older vehicles that some may sit a week or two in between being driven. It has become natural to me when getting into one of them for the first start in a while to put in the key and turn the key switch to the ON position a couple seconds while I am doing the seat belt, rolling down the window, etc. stuff like that, until the CK everything lights go out then hit the starter. Part of that process is pressuring up the fuel system. I then get a quick fire up every time. While a quick fire up might work for a newer vehicle, a couple of mine will not hold pressure for a couple weeks or more. This works for me, but I may be different as I have about a half mile drive at just a little above idle speed for a little temp warm up before hitting the gas for the main road.

Glad you found your problem, this is a great site for sharing all kinds of info, even things you don't want to know at times. Ha Ha Thanks to everyone.