I am experiencing an issue that nobody can seem to figure out. I have an 01 450 self loading tow truck with v10. After driving 60-70 miles +/- truck begins to lose fuel pressure. It begins sputtering and losing power and gets progressively worse the longer it goes until it just about completely dies and I can barely liMP to the nearest parking lot to let it cool down. Buddy put scanner on it and determined computer trying to send fuel but pressure tanking. I've changed 3 pumps and fuel pressure regulator. I've had similar problem with my '89 Bronco. Any info out there in this. In ready to junk the damn thing

 

That certainly sounds like a pump issue to me. Specifically an overheating pump. I'm guessing the fuel level in the tank has nothing to do with the stalling situation? IE: Does it only stall when you are low on fuel? My advice may sound strange, but....1. Look for an issue with your ground at the fuel pump. VERY carefully check your connectors for loose pins, corrosion, or a bare wire. Some fuel pumps come with new connectors. If yours comes with a new connector and pigtail there is a reason for that...Change that connector! 2. figure out a way to monitor the voltage input to that pump. But I would think you would have other electrical symptoms if you have high voltage. 3. Did you inspect the tank for crap in the tank? Your symptom does not sound like foreign objects running through the pumps, except that you have gone through three pumps.

 

Thanks for the quick response. You are correct that fuel level in tank doesn't seem to be the problem as it fails only after running for a certain amount of miles. The last time the tank was down the inside and fuel was clean. Your advice is almost exactly that of my buddy who is a Ford mechanic for roughly 30 years. Unfortunately he lives on the opposite side of NC and getting my truck there isn't practical. Ill be dropping the tank this weekend with one of the mechanics I have here in Charlotte. I appreciate the advice and maybe my situation isn't as hopeless as it looks.

 

I would check the catalytic converter , as it sounds like it is plugging up when hot .

 

The issue does seem similar to a plugged cinverter, however, I've never heard of ford torpedo converters like the one on my truck being known for going bad especially with the mileage I have on this truck(127k). Also I failed to mention previously, after driving to failure we put a scanner on it which showed computer trying to add fuel. We also put a fuel gauge on it and taped it to the windshield which showed s precipitous drop when trying to accelerate. These indications would not have shown hadn't we driven long enough to heat up. This issue is costing me $$$ in lost business not to mention paying to have repairs made which are not solving the problem. I've had worse luck with mechanics than any one I know

 

Is there a sucking noise when you remove the fuel cap? It might be a fuel tank vent issue.

 

I am not sure but will note that on my next fill up. I have had venting issues in the past

 

Fuel filter? Symptoms do not sound completely right, but have to consider it.

Would also suggest bad plug wires, but the fuel gauge would not drop because of that. The symptom matches, but your diagnostic gauge does not.