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305 acting up

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 84k5, Apr 20, 2001.

  1. 84k5

    84k5 1/2 ton status

    May 13, 2000
    Likes Received:
    Dublin, CA
    From a stop it would have no power, then be fine, then have no power. I turned it off and it started to deisal (I beleive thats the term for continueing to run after you shut it off). I waited a minute until it quit deisaling, then it started up fine, and ran fine the rest of the way home. I don't like the idea of driving around with something that might crap out at any time, so is there anything I should check? I dont want to get stranded in the middle of no where. Oh yeah, its in a 84k5 and is completely stock. Thanks for the help.

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  2. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Feb 17, 2000
    Likes Received:
    Cochrane, Alberta, Canada
    Was the motor warm when this happened? The cam lobe that actuates the fuel pump is well-known for wearing out on 305s, leading to vapor locking problems.

    My motor would try to vapor lock after I drove the truck around for a while, then stopped at a light, and then started again. It would totally die if this happened right after I came off the highway. I ended up installing an electric fuel pump and I haven't had a problem since.........

    The dieseling problem points more towards a timing/secondary ignition issue though. It might be worth it to pop out your ignition module and go get it checked at a parts place.

    Just a couple of ideas.............

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