Low Boost and Sluggish Acceleration - Ford Powerstroke Diesel Forum
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Old 02-04-2008, 03:29 PM
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Low Boost and Sluggish Acceleration

Hi, I'm new to the forum. I have a problem that has been stumping me for quite a while now and I was hoping to get some help with what it might be. I have a 1997 7.3L powerstroke with an automatic tranny. It has about 180K on it and I have owned it since it was new. At about 130K, I put a Bully Dog 4 bank chip in it and the truck ran great. It was very responsive and fun to drive. For about a year now, it has been getting less responsive and doesn't seem to be as quick as it used to be. From a stop, when I accelerate it takes off quickly like it used to but then boggs for a second or two like it can't get fuel fast enough, then takes off again. Recently, I replaced the Bully Dog chip with a TS chip, installed a 3" downpipe, and a Banks intercooler, along with boost and pyro guages. These upgrades seemed to help with the problem, but did not get rid of it. The boost guage reads a maximum of 11 psi at about 3,000 rpm. This made me think the turbo was going bad, but it still spools fine seems responsive on the guage. There is no shaft play, the assembly rotates smoothly, and the blades look like new. So I was thinking that maybe there is a fueling issue that is causing the turbo not to spool. I was thinking maybe the HPOP is getting weak or the injectors are going bad. Any thoughts on this would be greatly appreciated!!!!
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Old 02-04-2008, 03:50 PM
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When is the last time you changed your fuel filter?
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Old 02-04-2008, 03:57 PM
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The fuel filter was changed about 2,000 miles ago. I had to pull the whole fuel filter assembly out to change the lift pump and the fuel lines that run between the pump and the fuel filter housing because they were cracked. At that time, I cleaned out everything. The problem however developed before I did all of this work so that didn't cause it.
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Old 02-19-2008, 07:06 AM
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hope someone can help ya
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Old 02-19-2008, 08:11 AM
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Its possible its a hpop problem or a fuel pressure problem also. Probobly wouldn't hurt to have it scanned for codes and go from there.
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Old 02-19-2008, 11:22 AM
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Thanks for the replies. I was thinking maybe it is a bad IPR valve causing a lack of oil pressure to the injectors so I think I'll start there.
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Old 02-24-2008, 08:50 PM
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Did you get it fixed up
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Old 02-24-2008, 08:57 PM
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Not yet, haven't had time to work on it. I did buy a 17* HPOP and a new IPR on ebay though. Hopefully I'll be able to install it soon and see if it fixes the problem. Thanks for checking.
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Old 02-25-2008, 05:40 AM
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Let me know how you make out i'm having simmilar problems
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Old 02-25-2008, 09:23 AM
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Ya, I definately will. I'll post back when I get the pump and IPR in.
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