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Off camber engine idle

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by newyorkin, Aug 13, 2001.

  1. newyorkin

    newyorkin 1 ton status

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    Hey all. Not a major question here, just wondering about something.

    I had my truck pointed upward this weekend on a dune-type hill. I'd guess it was maybe 45 degree angle, but have no idea what it could've been (my short upper hitch ball was on the same level ground as the rear wheels, truck has 4 inch lift, 33"'s). I parked it there to get out and take a picture, and noticed the nuetral idle seemed boosted by about 300 rpm, to make it tach at 1000. I rolled back down later and threw her in park, idle was back around 700. I didn't think about it much then, but now I'm wondering what the heck could've caused it. More fuel to the rear cylinders or something batty like that?? This was one of the first time's I've had it at a sharp angle and put it in park (usually don't stop until I'm level again), so this could be normal for all I know.

    Any thoughts from the pros?

    Edit: It's a 350 w/TBI

    Ratch
    <a target="_blank" href=http://k5.8m.com>k5.8m.com</a>
    **Ever stop to think... Then forget to start again?**<P ID="edit"><FONT class="small">Edited by newyorkin on 08/13/01 11:55 AM.</FONT></P>
     
  2. Wheels

    Wheels 1/2 ton status

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    Carb related? Are you injected or carb'd?
     
  3. newyorkin

    newyorkin 1 ton status

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    Oh, right. 350 TBI

    Ratch
    <a target="_blank" href=http://k5.8m.com>k5.8m.com</a>
    **Ever stop to think... Then forget to start again?**
     
  4. newyorkin

    newyorkin 1 ton status

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    just want to top and get some more info.

    Ratch
    <a target="_blank" href=http://k5.8m.com>k5.8m.com</a>
    **Ever stop to think... Then forget to start again?**
     
  5. Triaged

    Triaged 1/2 ton status

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    Maby some frame flex was pulling on your throttle cable some how?

    '71 Blazer CST w/ a 400sbc, 4" lift, 36" Supper Swampers, and alot of rust
     
  6. jarheadk5

    jarheadk5 1/2 ton status

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    That's what I'd lean towards. Some body/frame flex pulling on things a bit.
    I highly doubt the TBI has anything to do with it; the whole reason a lot of people swap to injection is to end off-camber/uphill/downhill engine problems.

    It's always darkest just before it goes pitch-black...
    [​IMG] <font color=green>Semper Maintenance!<font color=black>
     
  7. newyorkin

    newyorkin 1 ton status

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    Frame flex makes sense, but The wheels were pretty even, kinda riding straight up a dune.
    I figured maybe this was something someone had seen before, and I'm curious, not worried. I didn't think TBI would have anything to do with it, just wanted to eliminate carb from the possibilities.

    Ratch
    &lt;a target="_blank" href=http://k5.8m.com&gt;k5.8m.com&lt;/a&gt;
    **Ever stop to think... Then forget to start again?**<P ID="edit"><FONT class="small">Edited by newyorkin on 08/14/01 10:15 AM.</FONT></P>
     

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