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Question
Brad,
I have a 66 chevy, 327, 350 hp engine, I believe I have a timing or electrical issue. I installed new plugs,points,condenser,coil. I have set the dwell at 30 degrees, set the timing at 6 degrees at idle and it seems to run smooth. However when I accelerate slowly at about 1300 rpm I get a slight miss to about 1700 rpm. The timing light indicates the advance at 1500 rpm to be about 44 degrees. Any suggestions on what the problem is? I am using the original distributor that has about 70,000+ miles on it.
This is right about the change over in the carburetor from the idle circuit to the high speed circuit and is noticable under a no load condition. I think that if it were me I would start by looking at the float level in the carburetor. It could also be weak springs on the centrifugal advance on the distributor allowing the timing to advance too quickly or a weak spring in the vacuum advance.
Brad
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| Rating(1-10) | Knowledgeability = 10 | Clarity of Response = 10 | Politeness = 10 |
| Comment | Brad, Thanks for the quick reply. Your answer is clear and I will give your suggestions a try. Thanks Bob | ||
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Answers by Expert:
Brad Sears
Expertise
All automotive including antique and collectible. However if the car has been modified I can only answer in general terms and maybe get you pointed in the right direction.
Experience
Automotive tech instructor.
Syndicated auto columnist 1970's though the early 1990's.
Syndicated auto radio talk show, Ask Brad About cars, CBS Radio 70's through 90's
TV Show "Last Chance Garage" 1980's PBS-TV syndicated.
Auto instructor for the following companies:
Fram
Autolyte
Holly
Carter
AMF
Ford Motor
University Of Conn
Blue Hills Technical School
Sugar River Technical Center
Grew up in a family garage in Needham Mass and turned wrenches from the age of 14.
Publications
Manchester Union Leader, Nashua Telegraph, Motor Service Magazine, Yankee Magazine, Popular Mechanics (Saturday Mechanic early 80's), Los Angeles Times, New York Times, and lots more.
Education/Credentials
More than I care to remember.
Basically Franklin Technical Institute in Boston, Northeastern University, Fitchburg State Teachers College, Tufts University, and a lot of factory schools along the way.
Awards and Honors
Moto Award winner. And much more.
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