Random miss. Please Help!!! - Ford Powerstroke Diesel Forum
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post #1 of 17 Old 05-09-2013, 12:31 AM Thread Starter
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Random miss. Please Help!!!

Hey guys I'm new to this thread but I thought yall might be able to help me out. When I'm driving down the road and I start to give it some throttle, the truck makes a random miss and kinda jerks. It doesn't do it all the time and never does it under light acceleration. It seems to only do it around 2000 to 2700 rmp's. When I first bought the truck and got it home I removed the chip that was in it and the 'miss' completly stopped. I bought a SCT flash programmer for it and tuned it to the performance setting and the 'miss' started up again. It never does it on the Tow setting, just on the Street and Performance setting. I'm somewhat new to diesels and I'm at a loss for words on what it could be.

I was thinking that it might not be getting enough fuel to support the high horsepower settings but I wouldnt know for sure. Any thought?

I couldnt figure out where to update my signature at but the truck is 2001 F-250 4x4 automatic. The only mods I have is 4 inch exhaust turbo back, AFE intake and SCT Flash tuner
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post #2 of 17 Old 05-09-2013, 10:37 AM Thread Starter
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I forgot to metion this, but it also doesnt throw any codes and no SES light comes on. Maybe one of you guys could help me out.
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post #3 of 17 Old 05-09-2013, 10:38 AM
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Injector miss?
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post #4 of 17 Old 05-09-2013, 10:42 AM Thread Starter
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Yes that's what it sounds like, but it doesn't do it all the time. And doesnt do it on the stock or Tow setting
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post #5 of 17 Old 05-09-2013, 10:43 AM
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only does it on the performance setting?
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post #6 of 17 Old 05-09-2013, 10:48 AM Thread Starter
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Well on the performance and street setting, yes. It doesnt make any sense to me at all. Some days it wont even do it but then there are some days I cant even put my foot in the pedal halfway without it doing it.
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post #7 of 17 Old 05-09-2013, 11:33 AM Thread Starter
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I read somewhere that the lift pump could be clogged up and it can't keep up with the fuel needs. Any thoughts?
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post #8 of 17 Old 05-09-2013, 02:00 PM
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Quote:
Originally Posted by backwoods19 View Post
I read somewhere that the lift pump could be clogged up and it can't keep up with the fuel needs. Any thoughts?
No lift pumps in these rigs. The fuel pump is mounted under the d/s frame, by the front door. Its possible, you need to do the HUTCH mod. Also, your HPOP probably is not keeping up with the demand of oil needed to release fuel, thus, falling on its face.

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #9 of 17 Old 05-09-2013, 07:55 PM
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I might be having the same issue on my 01 automatic 124,000 miles.. i will be at idle both in gear or in park and every once in a while it will almost sound like a miss. Or maybe a little rough idle. I havn't noticed it while I'm driving though. It's always on the stock setting also. Not too sure if it's normal or a developing issue... I'm still trying to figure out the truck seeing as I only got it a few weeks ago
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post #10 of 17 Old 05-09-2013, 08:06 PM
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A fuel pressure guage would help diagnose the suspected lack of fuel issue.
I scan tool and monitor icp,, and minus well watch backpressure while you are at it.
See which one hiccups when the truck acts up and you will know where to look.
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