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This is a problem that I have yet to solve after owning this car for over three years. After the car has sat for a couple of days, to start the engine the next time requires "excessive cranking" and "pedal pumping". Once the engine has been finally started, it will start fine for the rest of the day no problem. I have checked all aspects of the engine mechanically, the fuel pump pressure and volume, carb and base gaskets, the ignition system, plug wires and intake manifold and gaskets. I installed one of those fancy electronic ignition systems and it made no difference. I should mention that when it finally does start for the first time of the day, initially it does run quite rough, (fouling or fuel starvation ?) but quickly smoothes out. It sounds like spark plug fouling, but the plugs look fine and there is no sign of any blue smoke upon starting. The carb is the correct Holley R-3810, dated 267 and has the correct GM part number on it. A careful carb overhaul revealed absolutely no apparent problems or incorrect parts or settings. I can't believe that by sitting for a couple of days, all of the fuel in the primary fuel bowl evaporates out of the idle vent. I'm now wondering if there is a problem in the fuel lines or possibly on the fuel strainer screen on the sending unit. Somehow there's not enough fuel getting into the cylinders..Let's see...those spring clamps on the fuel hose don't seem very tight...hmm. Any advice that can be offered would be greatly appreciated. Thanks in advance guys..
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Re: Hard Starting '67 L-7
The excess cranking is due to having to re-fill the bowl. The bowl is either draining via the intake manifold or the fuel line. -
Re: Hard Starting '67 L-7
After the car has sat for the required period, (two days?), remove the air cleaner and open the throttle linkage while observing the primary venturies. You should be able to see the accellerator pump sprayiong fuel into the throats. If not, the bowl is leaking, probably into the intake. I would bet a moon pie and a big orange drink that that's your problem. Good luck.Comment
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Re: Hard Starting '67 L-7
Let car sit for required period of time. I think you said this was a Holley carb....
So, pull the sight plug on the side of the primary fuel bowl and check the fuel level. It should be at the bottom of the opening with car on level ground. If it is appreciably below, add fuel (squirt bottle through sight plug or down breather stack pipe) to get the level right.
Now, crank and test. If she starts and runs smoothly you either have a leak to find/fix or your float level is grossly mis-adjusted.
Rough idle after initial start without blue smoke flags too lean condition. This could be due to low level in float bowl, improper pull-off operation, improper choke closing position and/or improper function of high idle cam.Comment
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Re: Hard Starting '67 L-7
But how do you fix a leaky carb and where do they normally leak from?Comment
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