71Z - Starting Issue, Post Muffler Explosion

Discussion in 'Engine Topic' started by mgd1790, Jul 29, 2015.

  1. tom3

    tom3 Veteran Member

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    Check timing at slow idle, vacuum line unhooked. Set at about 14 degrees advanced if I remember correctly with the Z cam. Good way to set time without a light to get a rough setting, rev the engine steady, say 3000 rpm, move the dist. advanced to get best smoothest engine, back it off a bit.

    Worst case deal here, check for good rocker arm movement, maybe something destroyed the cam lobes... Sure hope not.
     
  2. mgd1790

    mgd1790 Veteran Member

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    Thanks. I'm also thinking the dizzy had/has some huge issues. Hope that's it. I'm throwing in a working one with the Crane Cams Xr-i Electronic Ignition later tonight.

    Regarding the cam, I had a remote started on it and used it to adjust all the valves. Didn't see any that were moving more or less than the others. Thank Baby Jesus there.

    I also have 2 guns including one I can dial-in/punch in the degrees.

    I will update. Thanks again.
     
  3. vlmohr

    vlmohr Veteran Member

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    Ignition module will cause your problem when they are starting to go. Will cause back firing due to loading up the cylinders with fuel. Then with the weak irratic spark you get the back fire. They will start sometimes when they cool down, but most of the time you'll get no fire. Easy way to tell if you have a spark problem is to put a timing light on it and have someone crank it over. If you have a light it's good no light then it's in the distributer.
     
  4. mgd1790

    mgd1790 Veteran Member

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    I was referring to a brand-new ignition module that I never used that I was going to try out. The dizzy I have in there wasn't the most expensive one and I guess you get what you pay for!

    Anyway, thanks for the tips!
     
  5. scott21

    scott21 Member

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    I was having some of the same problems you are having . I just installed a $47(shipped to my door) dizzy that I got on ebay and it runs the best it has all yr.
     
  6. mgd1790

    mgd1790 Veteran Member

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    Great. Which dizzy did you get?
     
  7. scott21

    scott21 Member

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    White performance and machine(out of TN.) $47.80 shipped to my door. Looks like the red Mallory dizzy.
     
  8. mgd1790

    mgd1790 Veteran Member

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    Hi, got the car running with a new dizzy. Running way rough still and here is what I know.

    - I get it to idle about 800 as it was before.
    - If I move twist it one way or the other it runs way more rough and dies.
    - When I put the gun on it, at 8 on the gun (and I adjusted it higher to test it out) the balancer mark is way, way past the timing tab on the cover (2" or more).

    I can take a picture but it was almost at 3 o'clock. Maybe 2:30-ish.

    I just got it started yesterday.

    Thoughts on why I'm off that much?
     
  9. Z28zz383

    Z28zz383 Veteran Member

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    Timing sounds so far off, it sure points to the chain being out of sync with the dist. and timing marks on the balancer.
     
  10. mgd1790

    mgd1790 Veteran Member

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    To use a technical term...poo! Well, I guess it could be worse.
     

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