Any Ideas?? Rough Idle after 175cc inj. and powermax turbo - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 16 (permalink) Old 03-24-2014, 07:00 PM Thread Starter
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Any Ideas?? Rough Idle after 175cc inj. and powermax turbo

Okay... 2006 Ford F250 6.0L II Stage 1 175cc injectors, Powermax Turbo, Sinister regulated return, innovative tunes, studded, deleted, MANUAL transmission. Problem: The truck fires up and runs great until it get to operating temp and then develops a random misfire. any load factor on the engine will get rid of it, and the truck runs great, except its pretty smokey and the miss at idle. Pressing the brake pedal down hard is enough load to correct the idle problem. Please feel free to help! Thanks!
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post #2 of 16 (permalink) Old 03-24-2014, 07:30 PM
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Re: Any Ideas?? Rough Idle after 175cc inj. and powermax turbo

Pressing the brake gets rid of the miss??
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post #3 of 16 (permalink) Old 03-24-2014, 07:35 PM
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Re: Any Ideas?? Rough Idle after 175cc inj. and powermax turbo

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Pressing the brake gets rid of the miss??
Yep just like any other car u hit the breaks while its idling and the engine gets a slight load and raises the rpms by like 50 or something like that lol

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post #4 of 16 (permalink) Old 03-24-2014, 07:43 PM Thread Starter
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Re: Any Ideas?? Rough Idle after 175cc inj. and powermax turbo

Well..the power steering pump loads the engine when brake is pressed. Actually the Rpm drops a bit, and idle smooths right out. Also if you kill the engine, and then start it back up it will idle fine until you touch the throttle, and if rpms go up, they come back down but never really level out again.
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post #5 of 16 (permalink) Old 03-24-2014, 07:44 PM
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Re: Any Ideas?? Rough Idle after 175cc inj. and powermax turbo

Wouldn't that be more of a gas deal because of vacuum?

Raising the RPMS by 50 still shouldn't get a miss to clear out cause the only thing that would do would slightly bring up rail pressure. And with that small of injectors I wouldn't think the stock hpop would be starving out in the rails.
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post #6 of 16 (permalink) Old 03-24-2014, 07:45 PM
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Re: Any Ideas?? Rough Idle after 175cc inj. and powermax turbo

Ahh see forgot about the pump feeds the booster.
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post #7 of 16 (permalink) Old 03-24-2014, 07:55 PM
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Re: Any Ideas?? Rough Idle after 175cc inj. and powermax turbo

Pretty good chance it's the tuning.


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A few engine parts here and there

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post #8 of 16 (permalink) Old 03-24-2014, 07:56 PM
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Re: Any Ideas?? Rough Idle after 175cc inj. and powermax turbo

Who's injectors? Misfiring or loping?

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post #9 of 16 (permalink) Old 03-24-2014, 08:24 PM
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Re: Any Ideas?? Rough Idle after 175cc inj. and powermax turbo

Better call drew I think you have a tuning issue

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post #10 of 16 (permalink) Old 03-24-2014, 10:42 PM
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Re: Any Ideas?? Rough Idle after 175cc inj. and powermax turbo

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Originally Posted by 06-6.0 stoker View Post
Pretty good chance it's the tuning.


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What he said...plugged spill ports?

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