im gettin 4-5 MPG's more city driving since i did my plenum with the hughes plate, kegger modded my manifold, and got the manifold ported and polished. but i also got fuel injectors cleaned, new valve cover gaskets, new pcv/crankcase breather, hughes intake gaskets, plugs, MSD 8.5mm wires, new cap/rotor, and coil.

i get 13-14 city, and 16-18 highway, and i have the 5.9L with 196K

 

actually its a 30 to 45 hp difference depending on year.(early 5.2 was rated at 200hp 5.9 235 and after 97 that went to 245hp for the 5.9 not sure what the later 5.2 was rated at....andthe 5.9 has a lot better torque.... still not saying its always worth it...just clarify fact from fiction on the specs.

 

i found a used 360 engine in my area for 350 bucks with 119K on

http://car-part.com

check your area

 

what does a "tune up" consist of. within the past 5k i have done e3 spark plugs rotor, new cap/rotor, new pcv hose, and tranny

 

new wires, and coil maybe... then that will be a full tune up with the things you've done above

 

i forgot to put wires in there. i found a nice coil on summit that i have been thinking abouut

 

you need to do a leak down test before you start crying the blues. Find out what's causing the lower compression. It could just be a bad valve stem seal, That'll cost you about $20 and 5 hours of time.

 

can u explain in more detail what a leak down test is?

 

a full tuneup doesn't involve replacing the coil.....you can have the coil tested for free if you suspect them bad but otherwise leave it alone.... he seems to have compression /oil burning issues ...nothing to do with a tuneup in my opinion.....likely the plenum and bad carbon buildup from it in the engine...replace gasket and install hughes kit or shorter bolts and seafoam it (or you can pour marvels mystery oil mixed with water down the throttlebody while giving it a good amount of gas but beware of the white smoke you'll get) and call it a day.....

 

what is the coil of choice around here?