Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

turn key off...truck keeps sputtering? *update* solved

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by trouble1, Sep 29, 2002.

  1. trouble1

    trouble1 1/2 ton status

    Joined:
    Sep 28, 2002
    Posts:
    346
    Likes Received:
    0
    Location:
    travelling, probably lost
    I have a truck that does not want to quit running when I turn the key off....It sputters until I floor it...Any ideas would be greatly appreciated. Not that this is a huge thing, but its alful annoying..Thanx /forums/images/icons/confused.gif

    I feel stupid....thanks for all your help!! I recently moved to Colorado and realized today the regular gas here is 85 octane...My blazer(or me) have never seen that low of octane. I drained that crap and filled up with 89 and appears all is better. Thanx,
     
  2. 4x4k20

    4x4k20 1/2 ton status

    Joined:
    Mar 17, 2001
    Posts:
    1,699
    Likes Received:
    0
    Location:
    williamson ga.30292
    Re: turn key off...truck keeps sputtering?

    that is caused by several things timing to high. fuel octane to low idle set high if its really not a problem for you just cut the engine off while you still have it in gear
     
  3. meatloafK5

    meatloafK5 Registered Member

    Joined:
    Oct 8, 2001
    Posts:
    53
    Likes Received:
    0
    Location:
    Lancaster PA
    Re: turn key off...truck keeps sputtering?

    As a guess, It almost sounds like your ignition timing is advanced too far. But I might be wrong. Try turning your distributor counterclockwise just a little bit at a time until it stops doing that and you still have good advance and acceleration. I would try that before ripping things apart.

    /forums/images/icons/cool.gif
     
  4. MUD JUNKIE

    MUD JUNKIE 1/2 ton status

    Joined:
    Oct 24, 2001
    Posts:
    379
    Likes Received:
    0
    Location:
    Reddick,florida
    Re: turn key off...truck keeps sputtering?

    if I can remember correctly,someone told me to put some ATF in the gas tank and it will burn the carbon off in the carb and will stop the dieseling
     
  5. YtseJam

    YtseJam 1/2 ton status

    Joined:
    May 19, 2002
    Posts:
    147
    Likes Received:
    0
    Location:
    CT USA
    Re: turn key off...truck keeps sputtering?

    !!! Absolutely DO NOT put ATF in your gas tank!!! Yes "dieseling" can be caused by excessive engine idle speed, incorrect timing, and or excessive carbon build up. You can use top engine cleaner or atf in the carb to help with some of the carbon build up.
     
  6. MUD JUNKIE

    MUD JUNKIE 1/2 ton status

    Joined:
    Oct 24, 2001
    Posts:
    379
    Likes Received:
    0
    Location:
    Reddick,florida
    Re: turn key off...truck keeps sputtering?

    like I said,IF I can remember correctly......thank you for the correction /forums/images/icons/smirk.gif
     
  7. R72K5

    R72K5 Banned

    Joined:
    Mar 5, 2001
    Posts:
    8,905
    Likes Received:
    0
    Location:
    central IL
    Re: turn key off...truck keeps sputtering?

    as mentioned before- several things cause this, and all the things cause excessive engine idle RPM, quickest way to make it quit is to turn outr the idle speed screw on the carb, and until then simply shut off engine while in gear,

    engine getting too hot can cause hot spots in some cylinders, enough to act in place of spark and ignite incoming air fuel mix when engine is still revolving
    carb idle speed screw turned in too far and is leaving throttle blades cracked open enoguh to allow enough air fuel mix to get by and into cylinders where it can compress and combust

    engine probably has some miles on it, tighter engine would stop a little quicker and reduce chances of run on

    if you have pinging noise under acceleration in gear then timing is advanced too far, if you dont have that thne just turn down your idle speed

    this condition can cause damage to rod bearings in that out of order firing can push down on pistons not in order and reverse direction of rotation instantaneously and that only can lead to bad things over time,

    good luck
     

Share This Page