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'70 Caprice 350/300hp Engine Miss

1669 Views 3 Replies 3 Participants Last post by  cbtlr
My Caprice runs real good @ idle, real smooth. I've put in new points/condenser/rotor/cap/spark plugs @ .35 . Dwell is at 29 degrees. Checked the timing + it's at factory spec. I sprayed WD 40 all around manifold & vac. hoses. Don't seem to have a vacuum issue.
If I put a load on the motor - It sputters & little popping (backfires) occur out of the exaust. Could it be the Coil is going bad? Seems like the more RPM'S I get -then it goes away...??
At night - I have noticed a slight flicker of the headlights & Alternator may be going bad...

I'm trying to avoid buying parts - I don't need.

Any Advice?

Mark in Kansas.:dunno::dunno::dunno::dunno::dizzy:
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How many miles on it? Ever adjusted the valves? Do you get the RPM's up on a steady basis....not just a rev -up in park, that's not a good idea, but do you stretch it's leg's, so to speak when going down the road? How long does the oil stay clean after a change?
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