2000 F-250 Engine Stall

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Aug 9, 2010 | 03:20 PM

z-hindle

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2000 F-250 Engine Stall

Hi Guys,
I'm new here...

I hope someone will help to find my problem.

I've a problem with my 5.4L V8.
It's occasionnal problem.

When I put in gear the truck and drive sometime the truck stop reving...

It stall at 2000 RPM and It's like i'm driving a Hyundai Accent with a 10 ton load in the trunk... No power...

I've plug my fuel pressure gauge and I've 43-45 LBS on idle... when I'm in drive and open throttle i drop to 8 LBS....

So I change the fuel pump and the fuel filter... Same thing...

I've 2 trouble code P0720 & P0722

It's look like a missfire... I know it's COP coil type.

I would like to know if this happen to some of you??

Let me know

Thanks

Aug 9, 2010 | 03:54 PM

DLP Performance

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Those are speed sensor codes. You might want to make sure everything is ok under the truck. No wires ripped out or anything like that. So you're saying at idle you have 45psi, but when you throttle it you drop to 8psi? Does it stall?

Aug 9, 2010 | 08:24 PM

z-hindle

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yeah W.O.T (Wide open Throttle) I've 8 psi... it doesn't stall but lack of power...
Like I said... I sound like a missfire...

does the Speed sensor will affect the engine rattling??

Aug 9, 2010 | 08:37 PM

DLP Performance

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The rattling is probably detonation from the lean condition caused by low fuel pressure. It should maintain that 45psi throughout the entire rpm range. Did you replace the fuel pump ASSEMBLY or just the pump inside? The pump should be internally regulated. It should also hold pressure after key is turned off. I'm suspecting a problem with the fuel pump, but it could have a wiring problem also.

Aug 10, 2010 | 07:41 AM

z-hindle

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Thanks for your response.

I only replace the fuel pump itself.
I've another truck in the yard with is a F250 V10 I'll remove the fuel pump ***'y and try it in my 5.4L. I think they are the same.

Aug 10, 2010 | 09:57 AM

DLP Performance

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Never install a used fuel pump. All the time you'll waste replacing bad fuel pumps with more bad fuel pumps, you can get a new one. Then you can go to work & make money.