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fuel

  1. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Hi everyone! This is my first post here, so forgive me if this the wrong section. I have a somewhat bizarre issue and thought I would see if anyone has any ideas. I have a 06' LS 4wd with the 4.2. A few months back, I replaced the fuel pump as the sender unit went out, and after about a week...
  2. General
    I think I read on here a thread that removing the rack up top helps fuel economy. I tried to search for it, but cant find the thread anymore Is there anything one can do to bring up the miles per gallon? Besides the typical - clean the throttle body, coast more, carry less, slow acceleration...
  3. Engine Tunes/Mods
    Background leading up to the beginning of power loss/drop: I have been receiving the P0171 and P1074 codes that have been set on and then set off. The entire intake air section has been checked for leaks using water and Starting fluid, no signs in the change of engine RPMS. I have lived with...
  4. General
    2006 Trailblazer. When I started it, it sounds like 'putt putt putt'. When I pressed on the accelerator the engine didn't rev up. All of the dash warning lights were on. I am looking for a clue as too what is wrong with it. Could it be something with the fuel pump, regulator or injectors? I...
  5. The "How-To" and DIY Section
    It made me put solved up there? Not sure if that's correct. I have a 2002 GMC Envoy with a 4.2L motor with 143K on it. I recently started to smell gas coming from the right rear side of the truck, so I assumed it was the fuel filter. Then when I would come to a stop sign it'd feel like it was...
  6. The 02-09 "How-To" and DIY Section
    http://www.youtube.com/watch?v=JCCSUjHsFgo
  7. OEM Issues
    This started happening just last night and this morning, after a full fill-up. 18+ gallons. Before I started taking photos, at 11 miles on the Trip Odo, the gas gauge went down to pass the 1/4 mark, and then crept back up to full. Putting the transmission in Park at a red light seemed to change...
  8. OEM Issues
    07 Trailblazer with around 60k miles on it. Had issues starting before but now won't start at all. Thought it was fuel pump, still not starting, Replaced Fuse 41, the fuel pump relay, still not the problem. Trailblazer ONLY starts when the relay is jumped (wire from battery to the relay prongs)...
  9. OEM Issues
    Hey everyone. Thanks for all the great info on this site. Ive saved so much cash doing repairs myself with the help of this site! I have an 02 Envoy, 4.2 with 124k on it and I could use some advise. I have read through tons of posts and I am not quite sure where to go from here. My truck...
  10. OEM Issues
    Hi, I have a 05 TB LS. The problem I am having is. When the engine is shut off, the fuel gauge needle does not always return to the "E" indicator. So if lets say the gauge was reading 1/2 and turned of, the needle would stay put. And when restarted the fuel gauge would read the previous 1/2...
  11. Audio and Electronics
    I just got my fuel sending unit replaced and it is showing the right level of gas now but my DIC fuel range is still way off. I have half of a tank and it is telling me that I only have like 110 miles left. Is this right? Is there a way to reset the computer so it can give me the correct...
  12. OEM Issues
    i have a '02 trailblazer lt with 4.2L with 118k. i replace plugs and filters about 1k ago and now the check engine light is on. it is "chugging at acceleration and a little at highway speeds". i ran the code at autozone, i dont have a code reader, and it can up as cylinder 1 misfire. i then...
  13. General
    Anyone ever had this problem? The fuel line popped off the fuel pump causing the 05 tb to stall and leave my wife stranded. I replaced the the fuel pump almost one year ago (about 9000 miles ago). I live in Indiana and the temps have been belo.w freezing and into the single digits for about...
  14. OEM Issues
    Hello All This is my first post but i have read and learned alot from you guys and gals. I have a 2004 GMC Envoy with around 75,000 miles. My problem started out with stalling and sometime dying. codes i have had p1133, p0133, p0132, p0171, p0172 i have replaced plugs, fuel filter, air filter...
  15. General
    i'm new to the forum, and new to owning an envoy. my previous vehicle's low fuel light would come on when my 20 gallon tank had run dry, but there was a 5 gallon reserve, which could keep me going for a while. when my fuel light comes on, how much more fuel is still in the tank? i have a...
  16. OEM Issues
    Just wondering. The local Chevrolet dealership has seen 6 TB of years 02 - 04 with burned exhaust valves over the last several months. They claim it is sorry local 87 octane fuel and are recommending the use of 89 for this reason. The area I live in is a small rural city with two fuel...
  17. OEM Issues
    Has anyone heard or seen of any corrosion on the plug to the fuel pump? What about broken or loose wires that might affect the fuel guage. I spoke to the dealer today, they have ruled out the fuel pressure sensor as well as the ICP. I put on a new feul sender this weekend and still having...
  18. OEM Issues
    I followed rbarrios instructions on how to replace the fuel pump. I kept the old pump and just replaced the fuel sending unit with an AC Delco sending unit. I have an 05 EXT TB. I must admit it was a lot more difficult than I expected. I backed the TB onto a set of ramps so the rearend would be...
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