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2000 Ford Explorer hard starting

Tiny
FOURSPEED
  • MEMBER
  • 2000 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 145,000 MILES
Car crangs in morning first time fine, when you drive sstop and restart it spins but not crank do a recrank three times an finally runs with no problems car has good power idles fine does not smoke or ever die I have replace fuel pump and filter twice in last 5 months also fuel pump relay. Pump does not run with ign on I thought it was supposed to run for a bit with just switch on, till it doas not see engine crank mode iwas planning to change ign switch. Car has 65 psi fuel pressure when running but o till crnk turn over
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Sunday, December 28th, 2008 AT 8:44 AM

8 Replies

Tiny
JASONRAY
  • MECHANIC
  • 213 POSTS
The pump should run shortly when the key is turned on because the procedure for checking fuel pressure says "connect fuel pressure guage and turn key on then observe fuel pressure." If you can't hear the pump run when you turn the key on or if you don't have any fuel pressure, check the inertia switch. It'll either be behind the right kick panel(next to passenger side floor board) or in the dash, under the radio. The text says one location and the wiring diagram I'm looking at says another. Try the passenger side kick panel first. There will be a dark green/yellow wire and a pink/black wire. Check the green one with a test light. Probe the connector and turn the key on. If the light lights up, with the connector connected to the inertia switch, probe the pink/black wire. Turn the key off for a second and then back on. Did the test light show voltage on both wires during the test? Repost and let me know so I'll know which direction to send you in.
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Sunday, December 28th, 2008 AT 1:43 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Hi, have you checked the fuel pressure regulator, remove the vacuum line to check for fuel, if fuel is pressent replace the regulator. Please let me know
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Sunday, December 28th, 2008 AT 1:45 PM
Tiny
FOURSPEED
  • MEMBER
  • 4 POSTS
Checked both wires on inertia switch, with just ign on no reading, crank ing 13 volts on both wires, checked vac on pressure reg no fuel present
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Monday, December 29th, 2008 AT 11:31 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Does it has fuel pressure while cranking?
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Tuesday, December 30th, 2008 AT 8:55 PM
Tiny
FOURSPEED
  • MEMBER
  • 4 POSTS
When the engine starts turning over it starts building fuel pressure till engine gets enough to fire around 40 psi and settles at 68 psi. As soon as you tur ign off fuel pressure starts and goes to o. Is it supposed to hold pressure?
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Wednesday, December 31st, 2008 AT 11:51 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
The pressure should jump up to about 55 and then hold the pressure. When you replaced the pump did you a factory ford pump?
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Wednesday, December 31st, 2008 AT 2:44 PM
Tiny
FOURSPEED
  • MEMBER
  • 4 POSTS
The first change 5 months ago I used a pump from auto parts, this time I bought ford with same actions
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Thursday, January 1st, 2009 AT 3:55 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Hi, it sounds like it could be the regulator itself not holding pressure, or the fuel pump is bad again, or the installation of he pump is faulty, double check it and get back to me.
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Thursday, January 1st, 2009 AT 7:41 PM

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