since installing a 4 inch magnaflow exahaust system my gas mileage has dropped considerably,..i bought the exhaust used from a guy who had it on an 04' but i am unsure it was an lly or lb7(never met him the deal was through a local truck shop) is the lly exhaust different than lb7?,.... or could there be another reason for this problem?,..any help would be great i am newbie and this problem is killing my pocket book ,.thanks..

Do you like the sound? Are you constantly stepping on it to hear it? That is really the only way it should hurt your fuel mileage.

yep. http://www.dieselplace.com/forum/smileys/Approve.gif Max is Correct.

Chasely27, I'll bet that Max and Burner are right on the mark...however since you purchased this used; did you check for debris or critters in the system before you installed it? Are you missing a cat? I'd check the flow at the tip to see if it is responsive to RPM changes. If you have a Pyro and boost gauge are they consistent with the before installation readings? It does sound good...doesn’t it? Good luckhttp://www.dieselplace.com/forum/smileys/Big Smile.gif

Chasely27, I'll bet that Max and Burner are right on the mark...however since you purchased this used; did you check for debris or critters in the system before you installed it? Are you missing a cat? I'd check the flow at the tip to see if it is responsive to RPM changes. If you have a Pyro and boost gauge are they consistent with the before installation readings? It does sound good...doesn’t it? Good luckhttp://www.dieselplace.com/forum/smileys/Big Smile.gif


ROFLMAO. Hey, I'm missing a cat, but I don't think it's stuck in Chasely27's exhaust. That fat bastard couln't fit in a 10" exhaust.


Dennis

Probably just a fluke that your milage dropped at the same time.


Check for a sticky caliper(i've had 2 now) and also check for the e-brake shoes to be adjusted too much or sticking (also had this). My mileage had dropped huge and now its back after these 2 things were attended too. Also check your tire air pressure while your at it. Simple thingas, but sometimes get overlooked http://www.dieselplace.com/forum/smileys/Approve.gif

Hey Dennis, you got me scratching my head on this one...what is ROFLMAO? Nobody has ever said that I was smart.http://www.dieselplace.com/forum/smileys/Ermm.gif http://www.dieselplace.com/forum/smileys/Confused.gif http://www.dieselplace.com/forum/smileys/Embarrased.gif

Hey Dennis, you got me scratching my head on this one...what is ROFLMAO? Nobody has ever said that I was smart.http://www.dieselplace.com/forum/smileys/Ermm.gif http://www.dieselplace.com/forum/smileys/Confused.gif http://www.dieselplace.com/forum/smileys/Embarrased.gif

rolling on the floor laughing my a.. off

Jim

Thanks Jim!!http://www.dieselplace.com/forum/smileys/Big Smile.gif

thanks for the help i still dont know what it could be,..oh well