6.0 ruff start/idle - Ford Powerstroke Diesel Forum
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post #1 of 17 Old 12-24-2012, 09:06 PM Thread Starter
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6.0 ruff start/idle

im new to this site, i need some insight i have a 07 6.0 had the engine apart to do head gaskets put new heads on new 175/75 injectors all new gaskets o-rings.. started for 1st time and ran ruff plugged in with code reader said #7 injector unplugged made no difference could this be FICM issues need help thanks
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post #2 of 17 Old 12-24-2012, 09:21 PM
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Odds are you have a bad injector, a contribution test will test will verify it.


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post #3 of 17 Old 12-24-2012, 09:36 PM Thread Starter
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see i was thinking that but read some posts on here that went each direction i tried not to think injectors seeing since they were all new but new parts arent always 100% fail proof i also plugged #5 to #7 and vise versa #7 still never fired had alot of smoke out of exhaust like missing injector firing never had any issues with fuel system previus to this
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post #4 of 17 Old 12-24-2012, 09:43 PM
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Sevens either bad, or didn't get installed correctly. Copper seal, maybe orings, especially if the smoke is white and smells like unburnt diesel.

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post #5 of 17 Old 12-24-2012, 10:50 PM
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or a pushrod missed the lifter when installed and is now bent.
at this point the valve cover needs to come off anyways. pull the VC and fire it up. see if the rocker arms are opening the valves at the same rate. if the push rods bent, it won't.
if that looks good, swap injectors 1 and 7. see if the problem follows the injector

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post #6 of 17 Old 12-24-2012, 11:11 PM Thread Starter
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yeah kaya that will be the plan wanted to the other day but was welly flustered with the truck if arms all moving proper and swap injectors around and issue doesnt follow would have to be a wiring issue but never had any injector/wiring problems before i took engine apart.......... i have been a mechanic for over 7 years so doing this stuff is nothing out of ordinairy its nice to have other opinions, views from people
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post #7 of 17 Old 12-24-2012, 11:31 PM
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i think between running it with the valve cover off and swapping the injectors, you will figure it out.
noticed you said new heads were installed. it's possible the heads were sitting for awhile and a valve seized. that would obviously be noticed with the valve cover off, running

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post #8 of 17 Old 12-25-2012, 04:38 AM
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I'm with kaya on this, i've seen this listed before. Op did you align the crank dowel in the six o clock position prior to installing the push rods?

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post #9 of 17 Old 12-25-2012, 05:41 AM
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I think #7 inject is bad from how you describe. You cant install the injector wrong unless you didnt torque the hold down. They injects on go in one way.. I would change out that injector first.

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post #10 of 17 Old 12-26-2012, 08:25 AM
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Quote:
Originally Posted by 04cr450 View Post
I think #7 inject is bad from how you describe. You cant install the injector wrong unless you didnt torque the hold down. They injects on go in one way.. I would change out that injector first.
Can't install the injector wrong? I've seen several, over the years, installed without the copper. I call that installing it wrong. Without the copper, compression ruins the lower o-ring, then fuel dumps in the cylinder and white unburnt diesel comes out the exhaust. Well, sometimes this can happen, not all/every time.

2006 built 05/05 XLT CC DRW PSD. Captain chairs, sunroof, polished aluminum wheels, 6speed, manual 4x4. 285K miles with 130K problem free miles on new engine.
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