And the Issues begin.... - Ford Powerstroke Diesel Forum
6.7 Performance Parts Discussion 6.7 Performance Parts Discussion

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  #1  
Old 05-20-2012, 06:18 PM
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And the Issues begin....

Well, last week I was preparing to go to the Lima 4x4 Jamboree. So Tuesday, I updated my h&s mini max to the 6.7-19 update. Drove all day wednesday just fine. Thursday morning it thru a code P0228F. H&S website said it was for throttle positioning sensor, Called dealer and they never heard of the code, but said it was for Fuel Pressure, either High or Low Pressure. Well, I cleared it left for the show Thursday mid-morning. Everything was fine on the 3.5 hour drive. Parked truck at show all weekend. And started it up this morning and CEL was on again for same code. Tried cruising around show and it died three times. So we disconnected the T.P.S. checked pins and reconnected and seemed to be a little better, but when the RPMs are dropping when slowing down/coasting sometimes it starts to drop below 500 rpms and then it kinda chugs back up above it. It does it mainly when its cold or right after start up. Once warmed up seems to go away.

Anyone have any thoughts about this?
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Old 05-20-2012, 07:54 PM
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Try setting the mini to monitor the ICP. That's the fuel rail pressure. It should be around 4100 at idle and 30000 at full throttle.
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Old 05-21-2012, 09:34 AM
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Quote:
Originally Posted by BIGGPIGG4x4 View Post
Well, last week I was preparing to go to the Lima 4x4 Jamboree. So Tuesday, I updated my h&s mini max to the 6.7-19 update. Drove all day wednesday just fine. Thursday morning it thru a code P0228F. H&S website said it was for throttle positioning sensor, Called dealer and they never heard of the code, but said it was for Fuel Pressure, either High or Low Pressure. Well, I cleared it left for the show Thursday mid-morning. Everything was fine on the 3.5 hour drive. Parked truck at show all weekend. And started it up this morning and CEL was on again for same code. Tried cruising around show and it died three times. So we disconnected the T.P.S. checked pins and reconnected and seemed to be a little better, but when the RPMs are dropping when slowing down/coasting sometimes it starts to drop below 500 rpms and then it kinda chugs back up above it. It does it mainly when its cold or right after start up. Once warmed up seems to go away.

Anyone have any thoughts about this?
I never had the CEL but mine did the "chug" if you were rolling through a parking lot and let off the throttle completely the RPMs would drop and them they would spike up for a millisecond. Its an h&s thing I believe. I no longer run their tunes.


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Old 05-21-2012, 11:30 AM
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Our truck exhibited some of the same symptoms and we found the issue to be the Cold Air Intake that we had installed. The Mass Air Flow readings were skewed enough to affect fueling in certain situations. We put the stock air box back on and it cured the problem for us. We suggest that you give it a try and post your results. We are here to help in any way that we can!
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Old 05-21-2012, 04:18 PM
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Quote:
Originally Posted by H&S Support View Post
Our truck exhibited some of the same symptoms and we found the issue to be the Cold Air Intake that we had installed. The Mass Air Flow readings were skewed enough to affect fueling in certain situations. We put the stock air box back on and it cured the problem for us. We suggest that you give it a try and post your results. We are here to help in any way that we can!
Are you saying that the stock intake may be a better option for these motors? Once again, thanks for responding to or questions.

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Old 05-21-2012, 04:23 PM
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Originally Posted by LFD132 View Post
Are you saying that the stock intake may be a better option for these motors? Once again, thanks for responding to or questions.

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We are. We have yielded best results with the factory air box installed. Our test truck is lifted 10 inches with 40's an gets pushed hard and we have never seen negative affects from running the stock air box. We cannot say the same about the cold air intake kit that we tried. Hope that helps!


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Old 05-21-2012, 04:37 PM
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Originally Posted by H&S Support View Post
We are. We have yielded best results with the factory air box installed. Our test truck is lifted 10 inches with 40's an gets pushed hard and we have never seen negative affects from running the stock air box. We cannot say the same about the cold air intake kit that we tried. Hope that helps!


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Guess I'll put the stock box back on and give it a try. Thanks
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Old 05-21-2012, 04:38 PM
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Does this have anything to do with the update? Cause I didn't have an issue before updating?
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Old 05-22-2012, 05:40 AM
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Quote:
Originally Posted by DirtBikePilot View Post
Try setting the mini to monitor the ICP. That's the fuel rail pressure. It should be around 4100 at idle and 30000 at full throttle.
I did this yesterday and it seemed to be good. Left the ICP up and today its reading 3.7-3.8 at idle in drive. Seen it go as low as 3.5. Truck ran fine before updating. How do I go back to older update to see if it still does it?
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Old 05-22-2012, 05:48 AM
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Quote:
Originally Posted by BIGGPIGG4x4 View Post
I did this yesterday and it seemed to be good. Left the ICP up and today its reading 3.7-3.8 at idle in drive. Seen it go as low as 3.5. Truck ran fine before updating. How do I go back to older update to see if it still does it?
Unfortunately you cannot go back in versions. The current update would not have caused the issue you are having.

Do as H&S Support has suggested and put the stock air box back on. If that does not help, please have a dealer look at your fuel system. The P228F diagnostic is thrown when your fuel regulator valve has exceeded its learning limits. This valve controls total fuel flow into your high pressure fuel pump. Depending on how much fuel this valve lets into the pump, is how much pressure your truck will have. This valve is allowed to "learn" itself when parameters become slightly out of range. Your truck has become too far out of range from the desired valve duty cycle, and thus has triggered this diagnostic code. This could be caused by a bad valve, bad fuel, stuck fuel relief valve, etc.

Good luck with it!
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