firemarshalmike
New Member
- Joined
- October 13, 2012
- Messages
- 9
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- Year, Model & Trim Level
- 1999 Ford Explorer Sport
Hey all,
I need some help with my daughter's 1999 Ford Explorer Sport 4.0 SOHC.
Fuel Pump help that is. Read many threads and learned alot but I am missing something. She turns ignition on, hears the PCM click, fuel relay click, fuel pump whirrrr. All is great. A few hours later after it has been sitting at school, she hears all the good sounds except for the whirrr of the fuel pump. Then as if by magic and many attempts at turning the ignition, the fuel pump gets back in the game. Once the car starts it runs absoultely flawless. Battery is good. Maxi fuse is good. PCM Relay, Fuel Pump Relay, PCM Diode all are good. Fuel pressure is outstanding once the fuel pump primes. Intertia switch is good. If the fuel pump is bad, would you be able to drive it without it stalling or acting up? I get it home and let it sit and then go out a couple of hours later turn the ignition on and 10 times out of 12, all is great. I have followed the wiring as close to the tank as I can get and there appear to be no crimping or breaks. It would not start for her the other day, (no fuel pump noise) and her friend jumped the car off and she said it started instantly. Go figure. It seems that it takes a jolt of electricity to get it working again. I am thinking the sending unit but wanted to ask you all what you thought. Thanks for your time.
I need some help with my daughter's 1999 Ford Explorer Sport 4.0 SOHC.
Fuel Pump help that is. Read many threads and learned alot but I am missing something. She turns ignition on, hears the PCM click, fuel relay click, fuel pump whirrrr. All is great. A few hours later after it has been sitting at school, she hears all the good sounds except for the whirrr of the fuel pump. Then as if by magic and many attempts at turning the ignition, the fuel pump gets back in the game. Once the car starts it runs absoultely flawless. Battery is good. Maxi fuse is good. PCM Relay, Fuel Pump Relay, PCM Diode all are good. Fuel pressure is outstanding once the fuel pump primes. Intertia switch is good. If the fuel pump is bad, would you be able to drive it without it stalling or acting up? I get it home and let it sit and then go out a couple of hours later turn the ignition on and 10 times out of 12, all is great. I have followed the wiring as close to the tank as I can get and there appear to be no crimping or breaks. It would not start for her the other day, (no fuel pump noise) and her friend jumped the car off and she said it started instantly. Go figure. It seems that it takes a jolt of electricity to get it working again. I am thinking the sending unit but wanted to ask you all what you thought. Thanks for your time.