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Thread: engine sputtering while running errands

  1. #1
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    Default engine sputtering while running errands

    ok heres my deal, i have a 2000 XJ sport, 4.0, bone stock. the thing runs amazing except for when i have to run alot of errands, like start, and shut off alot.

    damn thing sputters and shakes right when i start it, until i get moving. then all is well, any clue where to start my investigation? any input would be awesome, thanks!

  2. #2
    Time n Money Ghost00TJ's Avatar
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    my 2000 TJ did the same a similar thing, it ended up being both ground wires. One from the battery to the firewall and the one from the block to the firewall.

    good luck
    F'it, aint my Jeep!
    Beer does a Jeep Good

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    Devil Doc Navydoc8778's Avatar
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    Dumb question, when was the fuel filter last changed? My XJ used to do this. It happens when the sediment is stirred up in the filter as the pump comes on. Just a thought.

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    Color Blind Trail Guide TJ 4 the Boxers's Avatar
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    Vapor Lock, maybe. Does the CEL come on?
    '01 TJ 4 Banger--2" BB w/OME, 1.25 BL, 1" MML, 33" Trxxus, Disco's and Skids.

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  5. #5
    Junior Member armymedic's Avatar
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    Look into the recall for the heat shield for the number 3 injector. Sounds like your problem. I bet it clears up after 30 to 45 seconds. I bet the fuel is heat sinking in the injector, makes for some ruff running until it clears up.

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    holy crap 4 responses, 4 different things . no clue about recalls on the XJ. im assuming your talking about factory recalls. i'll look into it.

    im going to take care of the fuel filter this weekend. only had the thing for like a month now. no clue on when the FF was changed, i also have to get new plugs/wires. and flush out ALL FLUIDS.

    no CEL at all, vapor lock is a possibility due to the fact that west palm is hot as balls all the time, and TONS of traffic. (and then shutting down engine to run into bank, then drive 5 mins to wherever, shutoff, restart, traffic blah blah blah).

    i'll check the ground cables "ghost00tj". although i feel it is more fuel delivery problems, then DC issues. but at this point, ill take any advice i can get! I'm an EX-Volkswagen driver/heavy modder, and some of the jeep stuff is chinese to me lol.

    any more input to make my sunday of turning wrenches go from 12 to 24? hahahaha! thanks a ton guys, ill keep ya updated

  7. #7
    Junior Member armymedic's Avatar
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    Check this out.

    THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-027-02,
    DATED SEPTEMBER 06, 2002, WHICH SHOULD BE REMOVED FROM
    YOUR FILES. THIS IS A COMPLETE REVISION AND NO ASTERISKS
    HAVE BEEN USED TO HIGHLIGHT REVISIONS.
    SUBJECT:
    4.0L Rough Engine Idle After Restart Following A Hot Soak
    OVERVIEW:
    This bulletin involves the installation of a fuel injector insulator sleeve.
    MODELS:
    2000-2004 (TJ) Wrangler (Domestic and International Markets)
    1999-2004 (WJ) Grand Cherokee (Domestic and International Markets)
    2001-2004 (WG) Grand Cherokee (International Market)
    2000-2001 (XJ) Jeep Cherokee (Domestic and International Markets)
    NOTE: This bulletin applies to vehicles equipped with a 4.0L engine (sales code = ERH)
    SYMPTOM/CONDITION:
    Customers may describe a 20 to 30 second rough idle following the restart of a heat soaked
    engine. This condition may be most noticeable when the engine is restarted following a
    prior 10 to 20 minute heat soak in hot ambient conditions of approximately 32 C (90F)
    or higher. This condition may be consistent with short city stop-and-go driving trips and
    can be aggravated by the use of fuel with a high ethanol content. Depending upon
    various conditions a MIL may occur due to DTC P0303 - Cylinder #3 Misfire.
    This condition may be caused by heat from the exhaust manifold that following engine
    shut down migrates to the area around injector #3 and causes fuel vapor to form
    within the injector. This in turn may cause a momentary misfire of cylinder #3 until
    the fuel vapor is cleared of injector #3. The insulator sleeve lowers the injector #3
    temperature to a point below which the fuel will not normally vaporize.
    DIAGNOSIS:
    1. If vehicle exhibits a rough idle, and if a misfire of cylinder #3 is observed following
    a 10 to 20 minute hot soak, perform the Repair Procedure.
    18-031-03 -2-
    PARTS REQUIRED:
    Qty. Part No. Description
    1 56028371AA Ignition Wire Shield
    REPAIR PROCEDURE:
    1. Cut insulator sleeve, p/n 56028371AA, to make two (2) insulator sleeves
    about 25-30 mm (1 in.) in length.
    2. Install one sleeve around injector #3, with the slit on the upward facing side of the
    injector. Install the other sleeve with the slit on the downward facing side of the injector.
    3. Confirm sleeve is flush to intake manifold surface around injector.
    4. Check injector #3 wire and ensure that the injector is rotated to a 2 o’clock
    position (from driver’s side of vehicle
    Last edited by armymedic; 11-22-2009 at 22:37.

  8. #8
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    wow that explains EXACTLY what is happening with my XJ. iv'e never reallt messed with injectors and what not. so maybe i should take it to the stealership?

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