I don’t have much experience with what a strong spark should look on an e-type but it seemed “OK”… Another thing checked that really had me scratching my head. I do think I have a spare I can swap out… Would the impedeance be off if measured if it’s bad? Would the car run poorly with a bad coil? It’s running fantastic outside of the starting issue. It’s about 5 years old with say 3-4k miles on it but that doesn’t mean much. No condensor as it’s 123 distributor now BUT the coil could be a culprit. Carbs were fully rebuilt by Rhys Kent couple years back. Insulator blocks and fiber washers are fitted. So I’ll give credit to Moss for general automotive experience, but I need to see this actually happen in an E-Type to believe.Ĭhecked.
#FIX VAPOR LOCK FULL#
If the fuel line was full of vapor local to the carbs, the vapor would just be pushed along by pressurized fuel from the pump, and would end up going out the vent. Once you turn the key, the pump would be supplying cool fuel to take the place of whatever had evaporated. Fuel would cook off, and evaporate away through the vent line. If fuel is boiling in the bowl, the vapor would rise upwards through the fuel, not down through the jet passage. But let’s say that Moss is right, and this really can happen. But the right side of a Jag engine is pretty cool, and the carb is separated from the block by a water-filled manifold and insulating blocks. It’s certainly possible for fuel to cook off due to heat soak. The question of fuel boiling of in the carbs is interesting. You would hear the electric fuel pump chattering like mad, trying to pump vapor. When it happens in a Jag,which is verrrrry rare, it’s in the short run between tank and fuel pump. Once the vapor pressure of the fuel exceeds ambient pressure, the fuel turns to vapor, which can no longer be pumped efficiently.
Unlike the Jag system, this run is at low pressure whenever the pump is running.
It’s a problem in vintage American cars with mechanical pumps, because the long fuel line runs past the warm block before it hits the pump. Vapor lock is caused by high temperatures AND low pressures.
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