6.4 engine miss - Ford Powerstroke Diesel Forum
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post #1 of 22 Old 11-21-2012, 04:13 PM Thread Starter
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6.4 engine miss

Anyone experience their 6.4 miss most noticeable at idle. Like every fifteen to twenty seconds It drops 40-50 Rpm's for a split second. I changed fuel filters been running diesel Kleen through it. DPF deleted egr still functions. 118k on the clock. It seems to be idling rough all around like vibrates and rattles things inside the cab somewhat. If you have a drink in the cup holder it leaves little ripples in it. ???


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post #2 of 22 Old 11-21-2012, 04:31 PM
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you could have an injector going out. do you have any way of looking at the short term fuel trims of the injectors?

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post #3 of 22 Old 11-21-2012, 04:39 PM Thread Starter
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No I'm not exactly sure what you mean? I have a race evolution. It threw a over boost code the other day but that's it. It still runs strong just has that miss its starting to make me nervous.


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post #4 of 22 Old 11-21-2012, 04:48 PM Thread Starter
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The injectors in the 6.4 don't use engine oil like the 6.0 does if I'm not mistaken to fire do they? Thanks for the help.


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post #5 of 22 Old 11-21-2012, 04:59 PM
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the only scanner i know of to check the fuel trim is the ids at a ford dealership. 6.4 is high pressure common rail. so no oil to fire the injectors.

2003 F350 7.3L Lariat FX4
05-07 badges
05-07 front conversion
casserly stage 2 165cc injectors
srp1.1 hpop
gtp38r (should've done h2e )
custom 6 position chip
isspro ev2 gauges
6inch lift
4inch Straight Pipe
Mt's 37x13.50 R20
3.73 gears
billet converter
48 gallon fuel tank
08 Front and Rear Axles
plus more.....

soon to come: bts trans.
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post #6 of 22 Old 11-21-2012, 05:00 PM
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do you hear a ticking noise when it is missing?

2003 F350 7.3L Lariat FX4
05-07 badges
05-07 front conversion
casserly stage 2 165cc injectors
srp1.1 hpop
gtp38r (should've done h2e )
custom 6 position chip
isspro ev2 gauges
6inch lift
4inch Straight Pipe
Mt's 37x13.50 R20
3.73 gears
billet converter
48 gallon fuel tank
08 Front and Rear Axles
plus more.....

soon to come: bts trans.
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post #7 of 22 Old 11-21-2012, 05:05 PM Thread Starter
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No ticking it just misses. Like its going to die for a split second and shakes the truck just a bit like you can hear and feel it. I thought maybe egr valve was stuck or sticking. I pulled that black plastic cover off the egr valve and was able to push the shaft down and it comes back up.


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post #8 of 22 Old 05-01-2014, 08:21 PM
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Did you ever figure this out? I am new to this site. I have the same truck with same setup. I am also having the same problem. I am leaning toward bad egr valve. I was curious as to what you found wrong. Thanks in advance.
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post #9 of 22 Old 05-03-2014, 07:06 PM
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Never mind, mine was just a dirty MAF sensor, all better now. I knew I over oiled the air filter.
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post #10 of 22 Old 06-08-2014, 07:24 PM
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Ok I retract my previous statement. My problem continues, only at idle when the A/C cycles. If a/c is off it does not miss. Anyone have ideas? I realize this thread is really old and will start a new one if no response.
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