2001 Fuel Economy/Vibration

[mmccarthy4]

I was looking to get feed back on two issues:

First, I picked up the truck last month(01 LT 168k). I paid low and needed to do some work. It ended up being, brakes(x4), u-joint, shocks(x4), transfer case and few litte things. A few weeks later I did new tires all around. I still get a vibration sometimes at 55/65 that comes and goes. It feels to be under my drivers seat area...Any ideas?


Second, I am getting around 10mpg overall 50/50 town highway with running around the kids etc. I know its a huge truck and nothing will ever be great about the MPG. Is there any though worth investing in to say pick up a few mpg such as cold air? exhuast cat-back? I've read on here many different opinions so I guess I am still torn.

thanks for any feedback!

 

[jomulk56]

I get 13-15 average with my 01 with an aftermarket exhaust, intake, and new plugs/wire.


Sent from my iPhone using Tapatalk

 

[mmccarthy4]

Sounds good jomulk, I was thinking that route to start. New plugs/wires are going in this weekend or next depending on time/weather, then I will shop for the intake/exhuast...Any intake suggestions?

 

[ccapehartusarmyINF.(ret)]

something seriously wrong there i get 15 mpg in my 02 on the trip i just took and i was doin 80 mostly
dont waste money on intakes they dont do anything stick to headers and exhaust
do you have a scan tool of some sort
if so plug it in and make sure the PCM is not staying in open loop
the pcm runs a rich mix in open loop untill the vehicle reaches the proper operating temp
if its staying in open loop that would explain the poor gas mileage

 

[jomulk56]

Sounds good jomulk, I was thinking that route to start. New plugs/wires are going in this weekend or next depending on time/weather, then I will shop for the intake/exhuast...Any intake suggestions?

The best rated intake is the airaid MIT, just the smooth tube with the stock box, but I went with the Insys one on eBay because I've ran it in 2 other vehicles and it's cheaper. Exhaust wise I went with the one in my sig because I wanted a low roar and no drone.


Sent from my iPhone using Tapatalk

 

[mmccarthy4]

i have a friend who has a scanner I will try and see him this week to check out the pcm then report back here what it finds...

 

[Warrior14]

When I got my hoe about 3 years ago, she got an average of 10.5 per tank. And I drive about 50/50 too. I did the swiss cheese mod, bought a Bully Dog, and aired up my tires good. It helped a lot on the crappy mpgs. I'm averaging 13 in town and about 15-17 at 65-75 on the bypass.