hard to starting after sitting a few hours.

[pjd2000xlt]

I have a 2000, Explorer with a V6 OHV engine. I have an intermittent problem with it not starting after sitting for a few hours. If it does not start on the first crank I have to give it some gas while I am cranking to get it to start. I do not have any other problems with it running rough or stalling. What is causing this?

 

[00XLS]

Could be a number of things, first off I'd Seamfoam the engine (do a search), the put in a good fuel injector cleaner, clean out the IAC, maybe a tune up as well. Whats the mileage on it?

 

[romar]

Sounds like the fuel pressure regulator is bleeding off fuel back to tank. Pumping your accelerator isn't doing a thing, 'cept confusing your ECU. Next time try cycling the ignition switch a few times, between the run and off positions. That will prime your fuel rail with fuel.

 

[performancenut]

Sounds like the fuel pressure regulator is bleeding off fuel back to tank. Pumping your accelerator isn't doing a thing, 'cept confusing your ECU. Next time try cycling the ignition switch a few times, between the run and off positions. That will prime your fuel rail with fuel.

Yep. See, your fuel pump has to build up pressure and fuel before it can get gas to the injectors and subsequently cylinder. Check a fuel pressure both running and at intervals after engine is shut down. Also, try pulling the vacuum line off the fuel pressure regulator and see if fuel drains out (a good sign of a faulty FPR.) Alternatively, this could be a fuel pump that is bad. Other possible causes obviously exist also, but these are a couple of more common possibilities.

 

[old mechanic]

YUP. Sounds just like when the old non electric bad fuel pumps would let the gas drain back.

 

[pjd2000xlt]

How can I identify the Fuel Pressure Regulator?

How hard is it the replace?

 

[romar]

It's mounted along the fuel rail and has a vacuum line running to it.

Not so sure what kind of acess you have to it.