PerformanceTrucks.net Forums

Notices
GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |
Sponsored by:
Sponsored by:

L92 MPG's w/ bolt-ons & towing cam?

Thread Tools
 
Search this Thread
 
Old 06-06-2018, 12:04 AM
  #11  
TECH Senior Member
iTrader: (2)
 
FFDP's Avatar
 
Join Date: May 2014
Location: Rogers, MN
Posts: 5,189
Received 546 Likes on 472 Posts
Default
Some of you guys must have lead foots and brake way late to only avg like 12 mpg lol.

That's even worse the EPA ratings of 12/18 with 14 combined from way back in 2008. 2010 even got a bump with the AFM/DoD and VVT changes.
FFDP is offline  
Reply Like
Old 06-07-2018, 12:42 AM
  #12  
TECH Apprentice
 
swathdiver's Avatar
 
Join Date: Aug 2017
Location: Treasure Coast of Florida
Posts: 378
Received 49 Likes on 46 Posts
Default
Originally Posted by rumblebox
What MPG improvements you guys are seeing in L92's with truck cams and headers? So far, all I have is a tune, and the gas is absolutely killing me. 13 on the highway at best, and about 11 in town..... and it's a short wheel base Yukon.
Worn out cats and or lazy O2 sensors.
swathdiver is offline  
Reply Like
Old 06-07-2018, 07:56 AM
  #13  
TECH Fanatic
 
tgui's Avatar
 
Join Date: May 2014
Location: VA
Posts: 1,252
Received 7 Likes on 6 Posts
Default
Originally Posted by swathdiver
Worn out cats and or lazy O2 sensors.
Thats a good point.

Hell tuned engines can run leaner and can damage old cats. One of my stock cats had a melting/degradation spot or two.
tgui is offline  
Reply Like
Old 06-07-2018, 08:47 AM
  #14  
TECH Apprentice
 
swathdiver's Avatar
 
Join Date: Aug 2017
Location: Treasure Coast of Florida
Posts: 378
Received 49 Likes on 46 Posts
Default
Same, my engine always runs great but was getting terrible mileage. My O2 sensors are fine but my cats were bad and after time began throwing codes.
swathdiver is offline  
Reply Like
Old 06-07-2018, 08:54 AM
  #15  
TECH Fanatic
Thread Starter
iTrader: (9)
 
rumblebox's Avatar
 
Join Date: May 2005
Location: Victoria, TX
Posts: 1,673
Received 1 Like on 1 Post
Default

Originally Posted by swathdiver
Worn out cats and or lazy O2 sensors.
With 190,000 miles, it's very likely. The Bluetooth scanner for my phone though doesn't respond quickly enough to let me know how fast the sensors are switching back and forth. I'll have to put it on a real scanner
Last edited by rumblebox; 06-07-2018 at 10:32 AM.
rumblebox is offline  
Reply Like
Old 06-09-2018, 04:50 PM
  #16  
TECH Enthusiast
 
1redta's Avatar
 
Join Date: Dec 2004
Location: fort campbell
Posts: 553
Received 38 Likes on 35 Posts
Default
I like the 132% VE
1redta is offline  
Reply Like
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Wtt: 2000 Camaro Z28, Bolt-ons, Cam, N.o.s & Built Tranny.
1bad02
Cars and Motorcycle Classifieds
11
01-10-2008 03:12 PM
All 5.3l with cam/bolt ons come in
TouchOfEvil04
Dynamometer Results & Comparisons
38
09-07-2007 11:53 AM
What cam for 6.0 LQ4 w/ all bolt-ons?
CashDudeHomie
GM Engine & Exhaust Performance
23
06-28-2006 10:27 PM
13.9s w/ bolt ons, tuning & tire
Sport Side
Drag Racing
33
02-08-2006 07:32 AM
Back to Subforum
GM Engine & Exhaust Performance
View Next Unread
14 Sierra 5.3 Header questions




Advanced Search
Quick Reply: L92 MPG's w/ bolt-ons & towing cam?


Reply Closed Thread Share

All times are GMT -5. The time now is 08:37 PM.