mpg sucks
Junior Member
Joined: Nov 2008
Posts: 277
From: Indianapolis, IN
RE: mpg sucks
ORIGINAL: bandidolenny
Are your tires properly inflated? Make sure your catalytic converter is not clogged. Clean the MAF sensor... to do this, remove the unit from truck, remove the honeycomb looking screen and throw it away. Spray throttle plate cleaner on the small delicate wire sensors... DO NOT touch them. While your at it, cut up or drill holes in your air box so that air can flow freely into your K&N filter. All that is usually worth about 2 mpg.
Are your tires properly inflated? Make sure your catalytic converter is not clogged. Clean the MAF sensor... to do this, remove the unit from truck, remove the honeycomb looking screen and throw it away. Spray throttle plate cleaner on the small delicate wire sensors... DO NOT touch them. While your at it, cut up or drill holes in your air box so that air can flow freely into your K&N filter. All that is usually worth about 2 mpg.
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Starting Member
Joined: Jan 2009
Posts: 112
From: Janesville wi
RE: mpg sucks
yea my tires are good i just checked them ant the at like 32 just like the door says an i allready did the holes in the air box but i have heard bad things about taken the screen out of the maf sensor lol how should i go about cleaning the the intake an stuff with out taring it apart lol
BF Veteran
Joined: Oct 2007
Posts: 3,746
From: Raleigh, NC
RE: mpg sucks
Just remove the plastic intake runner from the throttle body. Its one hose clamp, a thumb screw, and it lifts off. Then just use carb cleaner and clean all around the butterfly plate. Thennnnn after that, do a seafoam cleaning!
RE: mpg sucks
ORIGINAL: bandidolenny
remove the honeycomb looking screen and throw it away.
remove the honeycomb looking screen and throw it away.
I have actual scans from side by side runs that I had made in my Bravada one run with the screen removed and another with it installed. The MAF frequencies were bouncing all over the place with the screen removed and along with this, the IPWs were jumping around as well. With the screen in, the MAF frequency was steady for a given engine RPM and throttle position and the IPWs were much more consistent. And there was no appreciable difference in WOT performance.
Pertaining to seafoam, just run a search and you should find more information than you need.
Super Member
Joined: Jan 2009
Posts: 1,349
From: Kerrville, Texas
RE: mpg sucks
I have cut up the air box and removed the screen on every 1996 and newer vortec that I have ever owned (5) without a problem. The screen isa restriction, there is no advantage to keeping it other than noise cancelation (although it does protect the delicate MAF sensors). I know that the engineers at GM have gone back and forth on this one for awhile now, the new trucks no longer have these screens.
Junior Member
Joined: Nov 2008
Posts: 277
From: Indianapolis, IN
RE: mpg sucks
I put some in the TB first. I poured it in and let it set a little. Started it up and stuck the PCV tube in the can and sucked it up. Yummy.
Then shut it down for about 5 min. The started it up and treated the neighbors to a mosquito fogging. The rest went in the tank. Been purring like a cat ever since.
Then shut it down for about 5 min. The started it up and treated the neighbors to a mosquito fogging. The rest went in the tank. Been purring like a cat ever since.