7.3 engine miss - Ford Powerstroke Diesel Forum

 
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post #1 of 3 Old 07-13-2008, 06:36 AM Thread Starter
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7.3 engine miss

ok this is a 7.3 99 model to start with it run really bad missings on several cylinders well i set down and read alot and this isnt my first time working on one of these but every time it can be doing same thing and still be something diff wrong. well buss test went well and did balance test came back with 2 and 5 bad so replace 5 ran better then replace 2 ran better again but still had a little miss at idle now irp and all is good even ran fuel presure test it is ok also so replace 8 with used injector still miss so went and bought a new injector for it and new valve cover gasket thought this can be only thing to fix it and also check compression on all cylinders that i worked on and all well over 400lbs truck runs good but still has miss at idle and shakes from the miss and still codes #8 on balance test got any to sugest people i even built a box that pluges in to the valve covers that alows me to cut out a cylinder like the old test on gas engines since we cant pull a plug wire
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post #2 of 3 Old 07-14-2008, 04:39 AM Thread Starter
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Originally Posted by wvandfree View Post
ok this is a 7.3 99 model to start with it run really bad missings on several cylinders well i set down and read alot and this isnt my first time working on one of these but every time it can be doing same thing and still be something diff wrong. well buss test went well and did balance test came back with 2 and 5 bad so replace 5 ran better then replace 2 ran better again but still had a little miss at idle now irp and all is good even ran fuel presure test it is ok also so replace 8 with used injector still miss so went and bought a new injector for it and new valve cover gasket thought this can be only thing to fix it and also check compression on all cylinders that i worked on and all well over 400lbs truck runs good but still has miss at idle and shakes from the miss and still codes #8 on balance test got any to sugest people i even built a box that pluges in to the valve covers that alows me to cut out a cylinder like the old test on gas engines since we cant pull a plug wire
fig this would be a hard one for anyone lol after 25 views didnt get one reply i knew it wouldnt be a easy one to get help on well going back and recheck every thing again and maybe i come across something i over looked
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post #3 of 3 Old 07-25-2008, 09:35 PM
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ICP. Try doing the 10k mod and see if that does it, or simply unplug the ICP.
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