Poor Gas Mileage - Page 3 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > Air Induction

Air Induction Performance Air Intake/Air Induction Modifications

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  #21  
Old 09-19-2012, 08:19 AM
hawk1 hawk1 is offline
Junior Member
 
2006 Chevy TrailBlazer SS (3SS)
Black 6.0L LS2 V8 AWD
Join Date: Jul 2009
Location: Rochester NY
Posts: 2
Hi all,

I have an 04 tb I6. I was getting maybe 210 miles to a tank of gas. I cleaned the throttle body and the filter ( k&n) and it made some difference. However after so good old research I found that if you change your map sensor and the VVT or even clean the VVT ( variable valve timing ) this helps a lot. since the change I am seeing a tank of gas lasting way more like stock and that was more like 295 - 320 city. highway like 400 to 420.. i also live in Florida where the temps are 90 to 100 summer and like 75 to 85 winter I failed to say the truck has 108.500 on the motor and trans and drives like a champ.

hope that helps.

Mike


Hey guys,

New to the forum. My wife and I just bought our first TB. It's a 04' LS with the I6 and it has about 64k. We are getting terrible mileage and I've read most of the gas mileage related posts. I'm still somewhat confused as to why I'm getting only 14-15mpg when I drive 70%+ highway miles. I have size 14 shoes, but I'm only a 72-80mph driver on the highway. Any advice will be greatly appreciated.


Thanks--[/QUOTE]
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  #22  
Old 12-11-2012, 04:49 PM
B-man0724 B-man0724 is offline
Junior Member
 
2004 Chevy TrailBlazer LT
Summit White 4.2L I6 4X4
Join Date: Dec 2012
Location: Hickory, NC
Posts: 3
Poor gas milage

Hey I'm a newbie to this forum and was looking for some advise on how to get better fuel milage out of my 2004 trailblazer LT 4x4 I'm currently getting around 12 mpg on hwy, that's all I drive it just to and from work the hwy is a little hilly but I set my cruise on 60 and I'm still only getting 12 mpg! Any suggestions??
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  #23  
Old 02-18-2013, 10:06 PM
ZTaylor7 ZTaylor7 is offline
Junior Member
 
2006 Chevy TrailBlazer LT
Superior Blue Metallic 4.2L I6 4X4
Join Date: Apr 2011
Location: Marshall, MI
Posts: 40
That's crappy. I'm getting 13.5 MPG on my way to work with the cruise set on 60 as well. Although it has the 3" lift and has 265/70/17 tires, so the speedo is off. So I'm probably doing 65 at 2,000 RPM's. I do have the 4:10 gears, and am planning a trip to Wyoming in a couple weeks which is a 1200 mile drive, and I figure it to be $700 in fuel both ways. I could take my Focus and cut it in half, but where's the fun in that, besides very uncomfortable. And suggestions on how to increase mileage? I've put new plugs, air filter, and cleaned the throttle body. Any help is appreciated.
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  #24  
Old 02-21-2013, 03:33 PM
MrBondohrama MrBondohrama is offline
Junior Member
 
2005 Isuzu Ascender
Summit White 4.2L I6 4X4
Join Date: Feb 2013
Location: Raleigh, NC
Posts: 6
consensus?

What is the consensus on getting better mpg?

- Throttle body cleaning
- CAI (is one brand better than another brand?)
- Higher tire pressure
- Move roof rack cross members towards the rear

Not clear if these things really work:

- MAP sensor replacement
- VVT valve (sensor I'm assuming)

Anything else and do these things really work?
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  #25  
Old 02-21-2013, 04:20 PM
edwin edwin is offline
Junior Member
 
2003 Chevy TrailBlazer LS
Silver Green Metallic 4.2L I6 4X4
Join Date: Nov 2011
Location: enderby b.c.
Posts: 48
poor gas milage

what temp does your gauge show? needle shud be at 210 if it is to the left you are running too cold and computor makes it run rich.
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  #26  
Old 02-21-2013, 06:45 PM
dakb dakb is offline
Junior Member
 
2006 Chevy TrailBlazer LS
Summit White 4.2L I6 4X4
Join Date: Jun 2012
Location: arkansas
Posts: 20
my temp gauge is always about 1 1/2 lines left of 210, is that enuff to cause crap mileage? last i calculated was 14.
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  #27  
Old 02-22-2013, 01:13 PM
edwin edwin is offline
Junior Member
 
2003 Chevy TrailBlazer LS
Silver Green Metallic 4.2L I6 4X4
Join Date: Nov 2011
Location: enderby b.c.
Posts: 48
poor gas milage

yes you need a new thermostat also at same time recomend replacing temperature sensor as it could also be going bad and it is right next to the thermostat. Do it soon as arunning cold is NOT good for the catalytic converterand that is real expensive.
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  #28  
Old 02-22-2013, 05:37 PM
dakb dakb is offline
Junior Member
 
2006 Chevy TrailBlazer LS
Summit White 4.2L I6 4X4
Join Date: Jun 2012
Location: arkansas
Posts: 20
is there a concensus as to what brand therm is best?
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  #29  
Old 02-23-2013, 12:39 PM
edwin edwin is offline
Junior Member
 
2003 Chevy TrailBlazer LS
Silver Green Metallic 4.2L I6 4X4
Join Date: Nov 2011
Location: enderby b.c.
Posts: 48
poor gas milage

OE is probably the best and Stant is a good brand but they make theirs at 86 degree celcius(187F) compared to oe at 88 degree (190F) so it would run a tad cool with Stant.
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  #30  
Old 02-25-2013, 04:19 PM
Pollotrablzrlov Pollotrablzrlov is offline
Junior Member
 
2002 Chevy TrailBlazer LT
Midnight Blue Metallic 4.2L I6 4X4
Join Date: Feb 2013
Location: eau claire wi
Posts: 12
how can i check what my mpg is on my tb?
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