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Originally Posted by Gaz64
You need to verify what manifold vacuum this is occurring at with a vacuum gauge in the driver's view.
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I'm planning on getting a longer hose to run the vacuum gauge into the driver's cab.
Quote:
Originally Posted by Gaz64
I would also have a fuel pressure gauge, or a fuel pressure warning switch to operate a lamp.
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I have a fuel pressure gauge in the engine compartment by the carb. It is stable at 6 pounds, but can't see it when driving. Maybe I can rig up the GoPro. Pump is a Mallory Comp Red 110 gph unit with a Holley return style billet pressure regulator near the carb. It should have enough umph to keep the carb fed.
Quote:
Originally Posted by Gaz64
Was there anything abnormal like fuel hose debris inside the carb?
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Nope, didn't find any foreign material inside the carb.
Quote:
Originally Posted by Gaz64
Have you checked the cap and rotor? MSD is known for failure is this area.
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New MSD cap, New MSD adjustable rotor - phased so the rotor is in the center of the cap electrode when the plug fires at idle. The center electrode on the rotor touches the carbon button on the top of the cap. No corrosion anywhere since they are all new. All 8 plug wires get spark with the timing light test.
Thanks for the thoughts. I will get the vacuum gauge where I or a passenger can see it and also try to check the fuel pressure.