I have a 98 dodge ram 1500 w/318 it runs and drives perfect,shifts good,but it has a miss or chugging feel at cruising speeds like holding a steady speed between 45 to55 or higher,any ideas would be helpful,have run 2 tanks of gas with injector cleaner with no change

 

bumpp

 

Sounds like you have a miss. (mine felt the same way....)

Start with a tune-up. Plugs, wires, cap, rotor. Might solve the issue. (get GOOD quality wires...... spend a little more, have fewer problems....)

Have you checked your plenum gasket??

 

My old 96 with the 5.9 did that, new plugs cured it for me (the wires were fairly new also, but replaced at an earlier time)

 

JUst bought the truck a few months back tune up was done just done think ill pull the plugs and see what they look like,what are the signs that the plenum gasket is bad?

 

The rear plugs, especially number 8, will be oil fouled.

You can also look down the throttle body, if you see pooled oil...... time to fix it.

 

What's the deal with this forum and plug wires? What's wrong with standard wires?

 

A rather critical part of your ignition system. The stock ones were crap when new. A fair number of the over-the-counter replacements are crap as well. Even dodge knew this, that's why there is a tech service bulletin regarding plug wire routing, as even NEW from the factory, they had problems....... (plug wire cross talk)

 

So it's an insulation issue? I just don't see the need for the fancy 8.5mm wires, unless you're running an upgraded coil

 

Not insulation, but inductive coupling.