sudden onset rough idle and codes 01 Lesabre

Discussion in 'Domestics' started by JP, Jun 30, 2013.

  1. JP

    JP Hero Member

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    When it rains, it pours, I guess.

    01 Lesabre running tip-top, including this AM. Started it up in the afternoon, idles very rough (but didn't stall) and set P0171, P0300 and P0131 codes.

    Cleared the codes and it reset a P0171. First job, I know, check all the vacuum lines and hoses. I have the diagnostic algorithm and the AutoEnginuity software to look at some functions, but any hunches?

    Wish I had a Tech 2 about now....
     
  2. kev2

    kev2 wrench

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    only the P0171?
    other p0131 is history?
    vacuum leak #1 - also a clogged not spraying injector, low fuel pressure, I will repeat low fuel pressure,

    use scanner to look at STFT ?
    also B1S1 voltage.
    Suggest
    start with fuel pressure then the spray trick for vac leaks....
     
  3. JP

    JP Hero Member

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    Yep, P0131 didn't reset after I cleared the codes.

    Spray trick?

    I know B1S1 and STFT and can measure those. But I don't know the secret handshake. ;D
     
  4. kev2

    kev2 wrench

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    using carb or brake clean- spray suspected vacuum leaks - a change in engine sound rpm will indicste that the spray has located a leak... intake manifold gasket, any Vac lines fittings, pcv valve, hoses.... eespecially related to bank 1.....
     
  5. JP

    JP Hero Member

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    And sometimes you get lucky. Rubber vacuum fitting for the EVAP was cracked and came off.


    Anyone know where to get these kind of parts? Dealer? It connects the two EVAP plastic hosed to the one opening in the throttle body, sort of like a triple female rubber connector, if that makes any sense.
     
  6. Gus

    Gus wrench

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    Junkyard?

    Buy from Dealer?

    Run separate vac lines?
     
  7. JP

    JP Hero Member

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    Dealer didn't have it. I'm thinking there's a creative solution, modifying available vacuum fittings and tubing. For the time being, it's being held together with RTV and zip tie. Eventually it's going to split again, and it's my kid's car; likely as not to stall in downtown Detroit.
     
  8. billr

    billr wrench Staff Member

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    Post a picture. It sounds like it is a specialized "tee", shouldn't be hard to come up with a substitute.
     
  9. kev2

    kev2 wrench

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    without a picture.... :BeatsMe

    But the link MAY be searchable ?

    http://www.dormanproducts.com/gsearch.aspx?type=keyword&q=vacuum+tees
     
  10. JP

    JP Hero Member

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    [​IMG]


    It's the rubber fitting attached to the two EVAP vacuum hoses.
     
  11. Mobile Dan

    Mobile Dan wrench

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    Ugly butt effective. Trim to size needed. Add hose to fit manifold and plastic hardlines.
    [​IMG]
     
  12. billr

    billr wrench Staff Member

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    What is that attached to on the TB, a nipple about 3/8" OD?
     
  13. Gus

    Gus wrench

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    Yes, it is about 3/8"......Looks like the line to the f/p regulator has had a "fix" already.....

    Cut a piece of fuel hose, should fit over that nipple.....then using Danica's tee, insert it into the fuel hose and then feed the purge solenoid and f/p regulator......if you can't find a tee like that(with various sizes that can be cut off), get a piece of vac line that will fit snug inside of the fuel hose(glue if necessary), and then insert a regular tee into the hose inside the hose...Mickey Mouse would be proud of us...
     
  14. JP

    JP Hero Member

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    Yep, there's a nipple on the TB that attaches to the fitting.

    The picture I downloaded off the internet; noticed that there was some modification too.


    Ridiculous that out of the gazillion vehicles over the years that have these fittings that GM or an aftermarket supplier wouldn't make them available. Searched the entire interweb....the whole thing....and only got the part number and a bunch of sites that once you click to order it, they tell you it's unavailable.

    Seems to me that it's a pretty simple thing to remove those parts from their online inventory if the part isn't made anymore; it's not like they're suddenly going to start making it again.

    Rant over. Now to get to the brakes and the PS pump....

    Thanks for the help, as usual, guys! fixed
     

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