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Discussion Starter · #1 ·
Hello everyone.

I was wondering if anyone could help me with a issue I have on my 2003 ford expedition Eddie bower with a 4.6 engine and just under 50,000 miles. It all started about a year ago when the truck would not start after a good drive. When first you start the truck it would turn on good, ran like a champ will not stall or nothing, ran it a good 20+miles and once you turn it off it would not start no more, it will just crank. You had to wait 4 to 6 hrs and then it will turn on with no issues. This happen for about 4 months strait and then the problem went away for good.

Last Friday when I turned the truck off it would not start at all and has not started, it will only crank. Battery is in good condition. Tomorrow I'm going to change the fuel filter. I'm guessing its the fuel pump but I'm in a short budget since I have been fixing up my stang. Dealer asking 900+ to replace the pump. I might try to change it myself and save over 400 but it will be my first time.

Is there anything else I should check or try to see before I change the pump. Can't be waisting money if its not needed.
Thank you so much for your time
 

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Discussion Starter · #3 ·
Thank you Corey, I'll check for the spark and the security stuff is off no indication that its on.
 

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If the motor turns over, its something electrical. If its a fuel pump, itll sputter n whatnot. Maybe starter shorted out or something since the battery is good. Could be wrong just my guess
 

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Yeah a symptom is when they are going bad or are bad when they heat up after a little drive they shut down...then after a sit they work fine again. Sometimes a cooldown can be minutes...sometimes hours. Ive seen both at work.
 

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Crank Position Sensors can overheat and stop spark

Check for spark... if it doesn't have one, look at this. I think Ford makes the modules part of the coil packs though, since the late '90s anyway. If so, you have two coil packs and if one went bad, only half the engine would be affected (it would try to start and put and go on).
 

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Could be the park neutral safety switch!


Try turning accessories on and then pulling the shifter into drive and back into park again.

Try it a couple times.

Sometimes this happens on my older jeep grand cherokee it's a 95. It's the park neutral safety switch just needing to be reset when that happens, on mine at least..
 

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He says its cranking, so its not a neutral safety switch. It keeps it from engaging the starter at all.

Oh, you can get a fuel pressure tester from a parts store for less than $40. Just screw it on the schrader valve (looks like the tip of a tire valve stem) on the fuel rail, and put the key in the on position and read pressure. If the pump isn't kicking on at all, we still have some options before replacing it, like checking relays.

You can also test to see if it fuel by removing the intake tubing and shooting a small burst of starting fluid into the intake. Crank it and it will putt and try to start for a few seconds. Don't over do the starting fluid. It's possible to pool the ether in the intake and make it go boom.
 

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I had an '03 Expedition 4.6 and around 70K miles it did the same thing. I drove it like that almost a year until it finally broke down and it wouldn't start anymore. I did as above, sprayed some ether in to the throttle body and it started up.

I bought a MotorCraft fuel pump from a local parts store (Arnold Oil) for $280 I believe. It was the entire assembly.

It took me about 1 1/2 hours to swap it out. I was lucky, my tank was almost empty.

After that, it ran great until I traded it in at 140K miles.

Save some money, do it yourself. It's easy.
 

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Brother's expedition did same thing. Thought it was fuel pump, turned out to be the key. Key lost programming on the chip. It cost him 300 for diagnostic and key reprogramming...
 

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Discussion Starter · #14 ·
Thank you guys all, great advice and I should hopefully get to it next week, I wanted to start tomorrow but I'm getting sick I believe...
Once again thank you all great advice from the mustang community
 
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