the odd looking wire re-route
to solve ignition wire crossfore,
particularly cylinders 5 and 7,
is here:
http://dodgeram.info/tsb/1998/18-48-98/18-48-98.htmalong with checking the o-ring seals of the injectors,
check the catch screens at the top of the injectors,
particularly cylinders 7 and 8 at the back
which are "first in line" to receive any gunk coming from the fuel line.
cylinders 7 and 8 deserve a bit of extra attention:
the plenum gasket usually blows inside the intake back near the inner inlets to 7 and 8
the headgasket usually blows at 7 or 8
these two cylinders seem to run leaner and hotter,
perhaps because the design of the exhaust manifold gives these two cylinders less backpressure and therefore less internal EGR, more fresh air in the cylinder intake charge
it may also be there is not enough coolant flow to those back cylinders.
When Evans Cooling tested their NPG coolant in Police service 5.2v8 Magnums in MI years ago,
their research report said they had to remove the heads and enlarge the coolant hole in the head gasket for the rear two cylinders.
doing an individual cylinder RPM drop comparison
power balance test
on the might show the weak ones
