+ Reply to Thread
Results 1 to 10 of 16

Thread: poor fuel economy

Hybrid View

  1. #1
    Join Date
    May 2009
    Location
    Plainfield, IL
    Posts
    2,036
    what's the weather like? Both my trucks lose 3-4 mpg when it's cold out...and I generally don't let them 'warm up'. Idle for 1-2 minutes for the oil to heat up, but that's about it.
    blown transmissions are about as useful as 97% of the guys on this forum

  2. #2
    Join Date
    Jul 2009
    Posts
    168
    15 mpg? That sounds great. I haven't got that in three years.
    2002 Under Construction Again!

  3. #3
    Join Date
    Jan 2010
    Location
    spanaway wa
    Posts
    419
    no it hasnt had the fuel filter replaced i will do that next weekend. Is there a way to check for plugged cats? the weather is mid 40s and low 50s, the yukon has always gotten 18-20 mpg no matter the season. And i keep telling my father to let it warm up , but he just fires it up and drives. any more ideas would be most appreciated. thanks again.

  4. #4
    Join Date
    Jun 2010
    Location
    West Texas
    Posts
    406
    O2 sensors with alot of mileage get lazy and will give poor MPG's. But only the upstream sensors.
    RUN WAT U BRUNG!!!!

  5. #5
    Join Date
    Jan 2007
    Location
    Stafford, VA
    Posts
    255
    Quote Originally Posted by RUFFNECK View Post
    O2 sensors with alot of mileage get lazy and will give poor MPG's. But only the upstream sensors.
    This is where I'd go ... doesn't sound through any of the posting these had been replaced. I'm going to be in need of doing mine soon as well.
    - Paul J.
    2006 Silverado LT3 L33 Z71 - Mods: K&N Air Filter; Taylor Wires
    2008 Azera Limited - Mods: (Yah, wife's car ... not happening)
    (SOLD) 1994 Camaro Z28 - Mods: (Too many to mention)
    (SOLD) 2004 Suburban 5.3L Z71 - Mods: Flex-a-Lite 292 Monster Fan
    (SOLD) 2000 Silverado 5.3L Z71 - Mods: (NTIKO)
    (SOLD) 1991 Suburban 350 2WD - Mods: (NTIKO)

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts