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Old 03-14-2014, 08:11   #1 (permalink)
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E250 Fuel Issues

2006 Ford E250 5.4 300,000 miles

Symptoms:

Loss of power. At idle, van will start choking as if to go dead only to re-gather itself. A couple of times a day this happens. This is my work van that I travel 100 miles a day. While driving, it originally would lunge, not it cuts out as if its running out of gas. My mechanic can’t seem to find the problem. No codes as of now but at times I will get a code P0193. Here is a list of things he has replaced,

1. ECM
2. Fuel pump & filter
3. MAFS
4. Throttle body
5. Spark Plugs
6. Coil Packs
7. Repaired wires on the harness to the ECM


Any suggestions? Could it be the Fuel Rail Sensor or possibly the Fuel Pump Driver Module? Now he seems to think it vacuum related.

Thanks
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Old 03-14-2014, 18:47   #2 (permalink)
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Re: E250 Fuel Issues

How about a cleaning of the IAC?
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Old 03-15-2014, 08:03   #3 (permalink)
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Re: E250 Fuel Issues

I should never assume but I would think the mechanic would have cleaned it when he replaced the throttle body. I'll have to ask. Would that dirty IAC have an effect on loss of power while I'm driving? Is it located on the side of the throttle body?
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Old 03-15-2014, 17:24   #4 (permalink)
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Re: E250 Fuel Issues

Not so much, I missed that point. As far as the mechanic cleaning the IAC, well, I had my tires pulled off the aluminum rims to be cleaned and since I didn't say to rotate them, I found markings on the inside of the tires so that they put them back on the same hub. Anyway, sounds more fuel delivery if this happens while moving. In order to confirm, might be worth while to hook up a fuel gauge so you can monitor while driving. Buying diagnostic tools often is sheaper than replacing parts needlessly.
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Old 03-18-2014, 14:46   #5 (permalink)
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Re: E250 Fuel Issues

I got a Wi-Fi data point reader that reads codes, gauges, etc. I was watching the fuel rail pressure. I pretty much stays at 40 psi. I did notice once that it ran quickly up to 51, the van lost power and the pressure dropped to 24 only to very quickly goo back 40. Is this loss of pressure making my van stumble?
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Old 03-18-2014, 15:41   #6 (permalink)
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Re: E250 Fuel Issues

Most likely, shouldn't g below 35 I think. The jump to 51 probably doesn't help, either.
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Old 03-20-2014, 11:38   #7 (permalink)
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Re: E250 Fuel Issues

I took it back to my mechanic and he hooked up his Scan Tool and tested the fuel pump. He said he ran it up to 80psi and it would not hold. Claims that the fuel pump is bad. I told him I had put a new fuel pump in it and he asked was it Motorcraft. It is not. He said he would put a Motorcraft fuel pump in it for $820. I had this same problem before I installed a new fuel pump and did all the other things? The is something wrong with my fuel pressure. Could it be a bad fuel pump the only cause for the problem.
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Old 03-20-2014, 12:26   #8 (permalink)
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Re: E250 Fuel Issues

Another angle on the fuel pump issue , not sure if it applies to your problem or not .

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Old 04-04-2014, 13:44   #9 (permalink)
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Re: E250 Fuel Issues

I replaced the fuel rail pressure sensor 3 days ago and I have not experienced a problem again.
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Old 04-04-2014, 17:29   #10 (permalink)
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Re: E250 Fuel Issues

Good to hear!
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