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> Gradually running rougher, And tailpipe popping
jeffdon
post Feb 12 2012, 10:27 AM
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So, My carbed, cammed, malloried 2056 has been steller for about 6k miles. Then on a run up to Santa Rosa it started feeling less "crisp" on acceleration, and is popping out the tailpipe when cruising along. Not loud bangs, kinda softly doing it. Getting also a bit of snorting out the carbs on start up. Going to crawl under today and check for exhaust leaks (SS exchangers).

What else should I check?

Valves?
Timing?
Ignition circuit?

Also, as an engine wears in and you start putting some miles on it, can it change in such a way that would require re-evaluating your jetting?
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jeffdon   Gradually running rougher   Feb 12 2012, 10:27 AM
jmill   Valves Timing Sync/tune carbs Check for exhaust le...   Feb 12 2012, 10:49 AM
jeffdon   Valves Timing Sync/tune carbs Check for exhaust l...   Feb 12 2012, 10:58 AM
jmill   What type of linkage do you have? I gave up on th...   Feb 12 2012, 11:15 AM
jeffdon   What type of linkage do you have? I gave up on t...   Feb 12 2012, 11:22 AM
914.SBC   Mine did exactly what you are describing (keep in ...   Feb 12 2012, 11:33 AM
jeffdon   Mine did exactly what you are describing (keep in...   Feb 12 2012, 11:34 AM
mrholland2   Mine did exactly what you are describing (keep i...   Feb 12 2012, 11:54 AM
jeffdon   [quote name='jeffdon' post='1623460' date='Feb 12...   Feb 12 2012, 11:56 AM
vsg914   gradual deterioration of power would point me towa...   Feb 12 2012, 12:06 PM
jeffdon   gradual deterioration of power would point me tow...   Feb 12 2012, 12:14 PM
vsg914   Ha! that would definitely cause a weak spark   Feb 12 2012, 12:29 PM
struckn   Ha! that would definitely cause a weak spark ...   Feb 12 2012, 12:53 PM
Porschef   Look for arcing from the plug wires and the conne...   Feb 12 2012, 01:02 PM
jeffdon   Look for arcing from the plug wires and the conn...   Feb 12 2012, 01:07 PM
jeffdon   Turned in the idle mixture screws, and it seems to...   Feb 12 2012, 12:46 PM
vsg914   Electrode is kinda hard to see, but doesn't lo...   Feb 12 2012, 12:50 PM
jeffdon   Electrode is kinda hard to see, but doesn't l...   Feb 12 2012, 12:58 PM
jmill   I'd be happy with that plug. Looks to be #9.   Feb 12 2012, 01:01 PM
jeffdon   I'd be happy with that plug. Looks to be #9....   Feb 12 2012, 01:08 PM
jeffdon   Seem to have most of the sluggishness tuned out ju...   Feb 12 2012, 04:21 PM
mrbubblehead   plugged idle jet?   Feb 12 2012, 08:31 PM
euro911   Are we supposed to change out our Bosch 'blue...   Feb 12 2012, 08:45 PM
mrbubblehead   Are we supposed to change out our Bosch 'blue...   Feb 12 2012, 09:04 PM


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