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Thread: Low gas milage, rough start.

  1. #61
    Join Date
    Jan 2015
    Location
    College Station, TX
    Posts
    115

    Default Re: Low gas milage, rough start.

    Well that's pretty cool. I'll do that then

    Sent from my SAMSUNG-SM-G870A using Tapatalk

  2. #62
    Join Date
    Jan 2015
    Location
    College Station, TX
    Posts
    115

    Default Re: Low gas milage, rough start.

    I took the jeep to O'Reilly's. They couldn't get any codes to come up so no dice there. I ordered the OBDII thing and it should be here tomorrow. Hopefully that'll get me some answers. I tried hitting the dash to get the gauges to work and the clear plastic had a bit more give than I would have liked so I hit it pretty hard just above the plastic and the only thing that moved was the speedometer. The gauges seem to work fine when the engine is on though.

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  3. #63
    Join Date
    Sep 2009
    Location
    Chico, CA
    Posts
    29,847

    Default Re: Low gas milage, rough start.

    You just forgot the pissed off part You say they work when the engine is on? Oil pressure will not work unless it is on. How about gas gauge and temp gauge?
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  4. #64
    Join Date
    Jan 2015
    Location
    College Station, TX
    Posts
    115

    Default Re: Low gas milage, rough start.

    Gas gauge and temp aren't budging until the engine is on. Not sure why the speedometer moved. It was parked

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  5. #65
    Join Date
    Sep 2009
    Location
    Chico, CA
    Posts
    29,847

    Default Re: Low gas milage, rough start.

    Not sure what to tell you then
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  6. #66
    Join Date
    Jan 2015
    Location
    College Station, TX
    Posts
    115

    Default Re: Low gas milage, rough start.

    Maybe I need to whack it harder

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  7. #67
    Join Date
    Jan 2015
    Location
    College Station, TX
    Posts
    115

    Default Re: Low gas milage, rough start.

    I finally got to use the OBDII. The only thing that's showing up as weird is my vacuum is varying between 4 and 20. I'm going to clean the throttle body today since it looks so gunked up its getting stuck open a little and see if there's any improvment. Not sure if that effects the vacuum pressure at all but it couldn't hurt.

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  8. #68
    Join Date
    Jan 2015
    Location
    College Station, TX
    Posts
    115

    Default Re: Low gas milage, rough start.

    So I hit a pretty big snag. Upon noticing that the inside of the IAC housing was full on caked with crud, I decided to remove it. Then proceeded to break one of the screws. Tried a screw extractor and that snapped too. I can get the other screws back in but I'm worried that won't seal properly without a screw. We're considering using JB weld but it's looking like I'll need a new throttle body. If anybody has any ideas I'm all ears

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  9. #69
    Join Date
    Sep 2009
    Location
    Chico, CA
    Posts
    29,847

    Default Re: Low gas milage, rough start.

    A new used throttle body is probably the easiest and cheapest solution
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  10. #70
    Join Date
    Jan 2015
    Location
    College Station, TX
    Posts
    115

    Default Re: Low gas milage, rough start.

    Yeah... Everything short of voodoo magic has failed so far. Pretty sure the thing was shot anyways (at least that's what I'm telling myself). I guess I get to visit the junkyard tomorrow. Whee

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  11. #71
    Join Date
    Aug 2015
    Location
    Downtown
    Posts
    636

    Default Re: Low gas milage, rough start.

    Is there a chance that your intake or exhaust manifold could be a little loose?

  12. #72
    Join Date
    Jan 2015
    Location
    College Station, TX
    Posts
    115

    Default Re: Low gas milage, rough start.

    It's highly possible. Everything around where the exhaust manifold attaches to the engine is terrifyingly rusty. I'm praying that all of that is somehow holding together

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  13. #73
    Join Date
    Jan 2015
    Location
    College Station, TX
    Posts
    115

    Default Re: Low gas milage, rough start.

    I think I found my problem. When I got the new part at the junkyard, I noticed that there were 3 cables attached to the throttle body pulling the lever, not just 2. I only have 2. The middle one is missing. Does anyone know where the other end of that plugs in so I can see if it's still attached somewhere? The diagrams I'm finding aren't proving too helpful

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  14. #74
    Join Date
    Jan 2015
    Location
    College Station, TX
    Posts
    115

    Default Re: Low gas milage, rough start.

    Aaaand I just found this:Click image for larger version. 

Name:	uploadfromtaptalk1442957827001.jpg 
Views:	44 
Size:	1.36 MB 
ID:	8266

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  15. #75
    Join Date
    Apr 2009
    Location
    Salem Va.
    Posts
    891

    Default Re: Low gas milage, rough start.

    One should be trans. kickdown, one should be cruise and one should be throttle. Just a guess.

    sent from a van down by the river

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