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Ignition missing under load
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MarkZee
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Joined: October 17, 2011
Posts: 204
Location: Oregon
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PostPosted: Wed Apr 18, 2012 5:48 pm    Post subject: Ignition missing under load Reply with quote

My stock 74 runs real good most of the time. But sometimes after pulling up a hill in 3rd & about 3000 rpm the exhaust sounds lumpy and there is some vibration of the shifter like a cylinder is not firing right. I have new plug wires, plugs electrodes not worn, valves adjusted & good compression. My next effort may be new dist cap. Does anyone have other suggestions?

Thanks
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cletus_zuber
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Location: Gladstone, Ore
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PostPosted: Wed Apr 18, 2012 6:06 pm    Post subject: Reply with quote

Does the car shudder and hesitate a little at those rpm's?

If so I'd suggest the main jet is a little lean.
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1972 1302
HPMX 40's & 019
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MarkZee
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PostPosted: Wed Apr 18, 2012 8:14 pm    Post subject: Reply with quote

It does have a bit of hesitation when first accelerating at low throttle & loer rpm. When rolling along a flat road at 50 does sound a bit burbly.
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