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Help my V8 is a V6

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by pornorob, May 23, 2003.

  1. pornorob

    pornorob 1/2 ton status

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    I've got a problem with my # 2 and #8 cylinderrs not firing on my 350. I've checked the plugs, wires, cap,and coil, and I'm getting plenty of spark. when I pull the coil wire off the cap and crank the egine and check the plugs they have fuel on them and I can smell the raw fuel in the exhaust when I run the engine. /forums/images/graemlins/confused.gif Anyone here ever have this problem or know what might cause this and how to fix it. Could an after market cam change the firing order or should it stay stock? This is driving me nuts. Its been a year and a half since I drove my truck ( engines are expensive to build) and this is all I have left to fix so I can run it . help me please.
     
  2. arq

    arq 1/2 ton status

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    start with the basics.

    what type of distributer is it?? HEI/points.
    are your points set at the correct gap??
    are you using the correct wire type??
    is your firing order correct??
    how are your pistons numbers??
    did you reverse the sparkplug wires??(this one always gets me)
    did you tighten up the rockers/lifters too much by any chance?

    ARQ.
     
  3. pornorob

    pornorob 1/2 ton status

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    its a points distrib, I would assume that the points gap is right because all the other cylinders are firing, I'm using borg warner select wires, I've triple checked the firing order, I don't know what you mean by the piston #'s or reversing the wires, and I had my valve lash set at a shop. I think that covers all the questions I hope it's enough to get a solid answer so I can drive my truck. thanx
     
  4. big pappa b

    big pappa b 3/4 ton status

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    [ QUOTE ]
    its a points distrib

    [/ QUOTE ]
    What!!??..$4500 in a motor and running points?? shame on you
    [ QUOTE ]
    I don't know what you mean by the piston #'s

    [/ QUOTE ]
    By numbers, he was asking about the compression for those cylinders ...tested with a compression tester.

    Is this a new motor? What type of cam are you running? Hydraulic or solid?
    If solid and the shop set the lifter then no problem
    If hydraulic, the they cold have those 2 a little tight. Best to check them before you round a lobe on the cam
     
  5. arq

    arq 1/2 ton status

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    is it a new points dist?? check the lobs in it. I once took an engine apart for no reason. turned out to be the lobs on the dist where worn a bit. I set the gap using a good lob, if a few are worn the gap wont be wide enough to give you the spark you need.

    also check the compression on those pistons. it's a good way to find out if your vavles are seating/adjusted correctly.

    ARQ.
     

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