Popping, Backfiring, Catching on Fire, Need Helppp
#14
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Join Date: May 2001
Location: St. Joseph, MI
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I had the same type of problem, reviewed timing and firing order literaly 100's of times, found I had mixed #7 and #8 wires....Dumb thing was I checked firing order over and over.
#16
Charter Member #71
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Get a vacum gauge and check for a intake or carb leak. If that dont work double check your valve adjustment, it could be too tight, then get rid of the advance/retard knob, set up the dist with the black spacer and the springs that allow all timing in at 3500. I forget which ones they are. Start motor run it up to 3500 and set full timing at 34*. If you dont have wires crossed that has to work. I assume you have a msd distrib and box. What was the cam degreed in at?
#17
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I had the exact same symptoms when I changes my intake manifold. I had removed the old intake one day and covered the top of the motor. The next day, I put the new manifold on. I had pulled the Dist. cap off with the wires attached and set it off to the side. Apparently, condensation formed inside the cap and it was all wet. I looked for the problem for many hours before I turned the cap over and looked inside.
#18
I hate the winter!!
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Assuming that your timing is correct, it sounds to me like your valves are too tight. How did you set the valve lash? What type of cam is it? Hydraulic roller , or ????
#20
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I don't see why a cam can't be degreed with the heads off. You still have TDC to reference off of. The cam can be advanced or retarded just fine. You can also read when a lifter will start to move. I just can't think of anything that would be missing which would affect the cam timing.