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Flooding and Gas IN crank case

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 82Jimmy, Apr 2, 2001.

  1. 82Jimmy

    82Jimmy 1/2 ton status

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    Damn it i can't figure this out! I spend 20 bucks on oil and its already tehre! New electronic fuel pump and its happening about 2 hours after i put it in! GOD SOMEONE HELP ME!


    ..........and one time at band camp.........
     
  2. HarryH3

    HarryH3 1 ton status Author

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    New electric fuel pump? Sounds like it has so much pressure that it's pushing the needle off the seat and overfilling the bowl. Installing a pressure regulator between the pump and the carb would solve that problem.

    Fix the problem before you waste the engine. The gas will be washing the oil off the cylinder walls. Not a good thing... [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
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  3. Emmettology 101

    Emmettology 101 3/4 ton status

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    Are you by any chances running your fuel line, from the elec pump, through the stock Mechanical pump?

    A friends mechanical pump diaphram went bad and was doing this....

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>

    " Ah.. Hong Kong, home of shiny green suit!"
     
  4. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    like harryh3 said it sounds like to much pressure i would put in a regulator

    77blazer see it at<A target="_blank" HREF=http://community.webshots.com/user/ssmith6333>http://community.webshots.com/user/ssmith6333</A>[​IMG]
     
  5. Pure Insanity

    Pure Insanity 1/2 ton status

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    if your feeding thru the mech pump it could be bad and pushin the oil into the crank case.too much pressure will do it too(killed my 1st camaro that way)oops just realized your flooding too,prob fuel pressure.

    PURE INSANITY
    86 blazer silverado 400 horse 350 w/vortec heads 38 x15.5 swampers (40 hawgs next)10 bolts(blah)w/4:88s coming soon,14 bolt.<P ID="edit"><FONT SIZE=-1>Edited by pureinsanity on 04/03/01 05:51 PM (server time).</FONT></P>
     
  6. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    well the only way it could get to the crank case is bad rings unless your getting lots of gas in the intake. Now some fuel "Smell" in the oil is normal and the higher the miles the more it will happen. It's just the natural blow by that happens in ALL internal combustion engines.
    As to the carb...Quads are prone too the casting plugs in the bottom of the fuel bowl developing leaks and draining the float bowl why the truck sits. Have to dissassemble the carb base to get to them but at this point wi would do a full rebuild if you got it that war appart and make sure you don't have problems like stuck or sunk float. Rebuild kit is $14 for everything but the float, cleaner and JB Weld to seal the castings holes.

    Diging it in the dirt with my K5's
    Grim-Reaper
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  7. 82Jimmy

    82Jimmy 1/2 ton status

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    I have a stock mechanical, I just bought an electric and where can I get a pressure regulator


    ..........and one time at band camp.........
     
  8. HarryH3

    HarryH3 1 ton status Author

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    Is gas still going through the stock mechanical pump? If so, you could be pushing gas through a hole in the diaphram if the electric pump is inline before the mechanical pump. If so, bypass the mechnical pump and see if the problem goes away.

    Any speed shop should have fuel pressure regulators in stock. A company called Cagle makes one that varies the pressure slightly, based on engine vacuum. At idle it drops the pressure, then when you get on the pedal it raises it a few PSI to make sure there's plenty of flow to the carb.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
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  9. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    While the Cagle is an awsome fuel pressure regulator. Unless the family bickering is over from the fighting over the design when Mr. Cagle died you not going to find one unless you luck up at a swap meet. Haven't been on the market for years. Too bad they fought so long. The carb is rapidly fading.

    Diging it in the dirt with my K5's
    Grim-Reaper
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  10. 82Jimmy

    82Jimmy 1/2 ton status

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    I'll start looking for one, but are they on ebay? Or what? Do they need to be rebuilt?


    ..........and one time at band camp.........
     
  11. HarryH3

    HarryH3 1 ton status Author

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    Didn't know that about Cagle. But then, the only things I've owned with a carb in the last 10 years or so are my lawnmower and weed eater. [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
    It's a great day to be alive...
     

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