missfire cyl 5

ok my 2002 dodge ram 5.9 miss when on overdrive at low rpm but goes good in idle or when i rev it , i change pluggs wire cap ... even try to changer injector place ! give no code but on computer od2 when test road si cyl 5 miss at 60 km/h in low rev!!!! allways cyl 5 no matter what i switch plug or injector !!! please help

maybe weak or broke valve spring.

Try doing a compression check. Ideally all cylinders should be within 5-6 percent. 10% is OK, but when it exceeds 20% I would be suspicious of some internal problems.

ya thats what i thing heard of positioning sensor or something like that

Check for an intake manifold leak

Those later 5.9 heads are prone to cracking between the valves

ok but is it dangerous to keep going like that at least unteel i cant get it fixt