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Old 02-09-2012, 07:20 PM
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loss of power. need help

2001 F350 7.3 auto. Tonight on my way home i loss power while accelerating. When I left from work, driving in the city, I didnt notice a problem. I got on the highway and accelerated up to 35 and then lost power. I could still accelerate but you could definitely feel where the power shut off. I stopped at a traffic light and floored it. It accelerated hard up to 35 and then it was like a switch was flipped. There is no rough idle and I can still hear the turbo. I stopped and bought a fuel filter and installed it, no change. From 0-35 it feels and sounds 100% normal. If cruising at 55 it sounds normal, but if I floor it, it will downshift and rev up like normal but quickly looses power. thanks in advance.
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Old 02-09-2012, 10:02 PM
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Any codes?
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Old 02-09-2012, 10:29 PM
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I dont know yet. happened on the way home. I cant find anyone local to do it for under $85 so I was hoping to not have to have them read.
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Old 02-10-2012, 12:14 AM
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Chasing a problem by throwing parts at it can VERY quickly add up to more than 85 bucks. Just sayin.
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Old 02-10-2012, 08:30 PM
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I have an appointment at the diesel shop Tuesday morning to see if there are any codes. The problem does not show up till it is at full operating temps. I also did not hear the usual hissing while warming up. does this sound like I could a ebpv problem?
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Old 02-10-2012, 08:36 PM
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It could be a pcm problem.
i dont know and hate to start guessing.
Let us know if there are any codes.
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Old 02-10-2012, 08:42 PM
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Quick question can I put two ab injectors in with aa injectors have two bad ones got a couple free and my truck is a 96 250 284000 miles
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Old 02-11-2012, 06:01 AM
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I cant answer that for ya.
Wouldn't mind knowing myself.
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Old 02-14-2012, 07:22 AM
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So it has a code 470. He also did a buzz test and said #8 had a problem. He also did a mechanical test and said #3 had a problem. He then cleared it all and ran every test again and they all passed except for the 470. He inspected under the hood and discovered the drivers side harness was replaced and the passenger side plug was coming loose and needed replaced. So the 470 is the EBP, would that cause it to defuel if ot was plugged? Thanks

Last edited by schemi; 02-14-2012 at 08:43 AM.
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Old 02-14-2012, 09:23 AM
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Quote:
Originally Posted by schemi View Post
So it has a code 470. He also did a buzz test and said #8 had a problem. He also did a mechanical test and said #3 had a problem. He then cleared it all and ran every test again and they all passed except for the 470. He inspected under the hood and discovered the drivers side harness was replaced and the passenger side plug was coming loose and needed replaced. So the 470 is the EBP, would that cause it to defuel if ot was plugged? Thanks
Malfunctioning EBPS can cause some problems, but I haven't heard of anything as severe as this. Are you running tunes on the truck? I know some custom tuners use the EBPS to dictate fuel mapping, so that could be your culprit.

As for your injector question, a 2001 should be using AD injectors, not AA...or did I read your question wrong?

Last edited by backwoodsboy; 02-14-2012 at 09:29 AM.
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