99 f350 rough idle lack of power - Ford Powerstroke Diesel Forum
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Old 02-13-2008, 08:06 PM
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99 f350 rough idle lack of power

i installed the power pup set it to the highest setting of 120 and it didnt do a damn thing no smoke no power nothing took it out and it runs the same rough idle lack of power i was told i am having a fuel problem 65 psi on rails bully dog says fuel filter but i changed it then i was told i have one in the tank can anyone help thanks
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Old 02-13-2008, 08:50 PM
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pull the codes first ...?is your truck a auto or stick ive heard of computer throwing fitts be cause performance chip is trying to change shift schule in a manual gearbox or vise versa!
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Old 02-14-2008, 02:30 AM
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its a auto trans and i have no codes i hooked it up to the snap-on modis and did every test and still nothing
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Old 02-14-2008, 09:03 PM
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OK did this truck run funny before you installed the chip?cause if not it could be the chip
But i dont know the bully dog line of products at all i hav a super chip and have never had one problem out of the one i put in my truck.. I have had problems with one on another 7.3 but that is another story
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Old 02-14-2008, 09:12 PM
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you could have a fuel sucking air problem ...on 7.3 there could be a hundred things that will cause this problem First i would check the fuel lines under the left head for o ring damage leakage then i would checkthe lift pump for leaking but i dont own a 99 mines a 02 and i work on 95-97s all day every day
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Old 02-15-2008, 08:23 AM
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yes it had a weird idle before im gonna try to drop the tank and see if the strainer is clogged who knows i only had this truck a month now and hoping to figure all the bugs out
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