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post #1 of 15 Old 11-13-2012, 05:18 AM Thread Starter
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Running on 7 cylinders

What would cause my #3 cylinder to not fire? Tried a diff injector still runs the same. Tried a diff ficm still the same. Diff pcm still the same. I'm lost, any ideas?

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post #2 of 15 Old 11-13-2012, 08:19 AM
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Wiring harness. What codes do you get?

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

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post #3 of 15 Old 11-13-2012, 10:10 AM
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Wireing or a actual cylinder problem. That said a valve problem would show up as popping thru the exhaust or intake. A broke ring [low compression] would only show up as a miss or excessive blow back, unscew the oil fill and see if it chuffs at ya.


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post #4 of 15 Old 11-13-2012, 10:39 AM
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Quote:
Originally Posted by dannyboy950 View Post
Wireing or a actual cylinder problem. That said a valve problem would show up as popping thru the exhaust or intake. A broke ring [low compression] would only show up as a miss or excessive blow back, unscew the oil fill and see if it chuffs at ya.
We are thinking alike, thats why i'm wondering if he has any codes. :thumbup:

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE - http://www.powerstroke.org/forum/gen...tml?highlight=
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post #5 of 15 Old 11-13-2012, 12:00 PM Thread Starter
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That's what I thought also. So I swapped a motor I had in that only has 100000 miles. Still does it.

Sent from my PC36100 using AutoGuide.Com Free App

03 exsb silver
6.0 powerstroke
4inch straight pipe
diablo programmer
nickname "the turb"

SOLD
96 exlb black
7.3 powerstroke
4inch straight pipe
BDP chip
Full force stage 1's
17* hpop
E-Fuel
Built Trans
nickname "the stroke"
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post #6 of 15 Old 11-13-2012, 02:51 PM
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Did you use the same harness?


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post #7 of 15 Old 11-13-2012, 02:53 PM
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Quote:
Originally Posted by powerstrokesmoke96 View Post
That's what I thought also. So I swapped a motor I had in that only has 100000 miles. Still does it.

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So you changed a motor, and the harness may be bad?

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE - http://www.powerstroke.org/forum/gen...tml?highlight=
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post #8 of 15 Old 11-13-2012, 03:40 PM Thread Starter
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But I tried a diff injector harness on the other motor still ran like crap. It's the #3 cylinder on both motors its gotta be somthin electrical but I don't even know where to start

Sent from my PC36100 using AutoGuide.Com Free App

03 exsb silver
6.0 powerstroke
4inch straight pipe
diablo programmer
nickname "the turb"

SOLD
96 exlb black
7.3 powerstroke
4inch straight pipe
BDP chip
Full force stage 1's
17* hpop
E-Fuel
Built Trans
nickname "the stroke"
powerstrokesmoke96 is offline  
post #9 of 15 Old 11-14-2012, 03:36 AM Thread Starter
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I just don't understand how my ficm is good and the harness and pcm and still have that number 3 cylinder not fire on 2 different motors. I haven't drivin my truck in almost a month. It's sad to see it sit there. Does anyone have any ideas?

Sent from my PC36100 using AutoGuide.Com Free App

03 exsb silver
6.0 powerstroke
4inch straight pipe
diablo programmer
nickname "the turb"

SOLD
96 exlb black
7.3 powerstroke
4inch straight pipe
BDP chip
Full force stage 1's
17* hpop
E-Fuel
Built Trans
nickname "the stroke"
powerstrokesmoke96 is offline  
post #10 of 15 Old 11-14-2012, 05:33 AM
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I think your going to have to dig deep into the harness. Do you have a monitor for live data? Any codes?

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE - http://www.powerstroke.org/forum/gen...tml?highlight=
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