| silverchief | -- 09-18-2014 @ 12:03 PM |
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A occasional but reoccuring slight stumble under normal acceleration on my 46 ....most pronounced when the engine is not yet up to operating temp. My fuel pressure regulator is set at 2 ...thinking of increasing it to 2 1/2 under the premise that engine might be slightly starved for fuel. Otherwise starts easily and idles smooth - hot or cold. Suggestions please.
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| ford38v8 | -- 09-18-2014 @ 3:11 PM |
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2 lbs is plenty. You might check the color of your spark plugs. Do this after running at highway speed for a while with an immediate shut down while at high RPMs. This will give you an accurate color on the plugs. An occasional stumble won't affect the color. A difference in color on one plug can also be a clue. You may also have a weak coil or condenser. Acceleration can blow out a weak spark under the higher compression. Alan
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| fla48 | -- 09-18-2014 @ 7:16 PM |
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A lean mixture can also cause this problem. Try adjusting the accelerator pump throw on the carb to give you a little more fuel on initial acceleration. There are three holes the linkage connects to and is an easy adjustment and starting point for trouble shooting.
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| silverchief | -- 09-19-2014 @ 10:57 AM |
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Thanks guys - I'll take a look at both.
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| 40 Coupe | -- 09-20-2014 @ 5:44 AM |
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The markings on the pressure regulator are for reference to position only and not to pressure. Put a gauge on the Carb inlet and adjust the regulator to 2 to 2 1/4#
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