Was getting on it, now problems - Ford Powerstroke Diesel Forum
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Old 06-09-2012, 05:17 PM
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Was getting on it, now problems

Ok so my truck, 144k miles. Stage 1 injectors and ts performance chip. I've recently had the trans rebuilt but it been giving me problems with a wining noise and shifting too early into 3rd gear. But I'm taking the truck back when I get back to town. Anyways so I had the chip in extreme. And I was getting on her pretty good. The check engine light came on which it's done before in that setting. I let off and coast to the stop sign , and as i am coasting the truck idles back down then idles lower, like as on it's about to stall. I stop and the Rpms come back up to what it is normally. My question is does this sound like a motor problem or trans? I'm thinking it has to do with the torque converter problem.The trans shop claims they put In a new tc but I'm not sure. I'm hoping it's the trans as it's under warranty.sorry for any newb questions, and thanks in advanced for any help!
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Old 06-09-2012, 07:27 PM
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Sounds to me like you are running out of fuel or your hpop can't keep up.
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Old 06-09-2012, 08:40 PM
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I had half a tank. So I think I'm good there, the hpop is stock along with the fuel system. Maybe time to upgrade, I guess I just need to further diagnose
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Old 06-09-2012, 08:42 PM
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I don't mean that you where out of fuel, I meant that your stock fuel pump can't keep up.
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Old 06-10-2012, 08:24 AM
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Ok I see where your coming from now, but I also forgot to say it does it's all the time now , like when I slow down for a stop light or getting off the highway, I let off the gas and it just idles down to normal, then idles slower like it's going to stall then goes back to normal
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Old 06-10-2012, 09:16 AM
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I had a "fluttering" idle for a while. Actually died at the stop light and in the MIDDLE of an intersection. It could be you need a new CPS. Camshaft Positioning Sensor. I just replaced mine yesterday and there was a noticeable difference in idle + startup

It doesnt hiccup when on the gas?
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Old 06-10-2012, 09:34 AM
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Or the torque convertor may not be releasing it sounds like...
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Old 06-10-2012, 12:07 PM
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thats what im hoping, because the tc should be under warranty
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Old 06-10-2012, 12:10 PM
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Well check the code first. I'll bet is an icp code for insufficient hpop pressure. How low are the RPMs going?

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Old 06-10-2012, 12:56 PM
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Tell as a code and well tell you a diagnosis. Code when stepping on it could be fuel oil or CPs. Cps could also cause the fluttering idle.


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