XJ6 & XJ12 Series I, II & III 1968-1992

Weather warming up- Hard starting now

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Old 04-10-2014, 02:37 PM
wardriver64's Avatar
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Default Weather warming up- Hard starting now

With the weather getting a little warmer I've noticed that once the cars been driven a bit stopped and started again, she takes several turns and some gas to finally start up and often times she'll die right after.

Do I need to make some adjustments to the Carbs? Slap on an electric fuel pump?

Any suggestions would be greatly appreciated.
 
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Old 04-10-2014, 09:37 PM
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Originally Posted by wardriver64
With the weather getting a little warmer I've noticed that once the cars been driven a bit stopped and started again, she takes several turns and some gas to finally start up and often times she'll die right after.

Do I need to make some adjustments to the Carbs? Slap on an electric fuel pump?

Any suggestions would be greatly appreciated.
That's just started happening here in Northern California too, Nate. I suspect it's the Winter gas, which is formulated to vaporize at lower temperatures.

With warmer weather, you may be experiencing a bit of vapor lock or boiling off of all the gas in your float bowl when you shut your engine down for a short time. When the engine sits long enough to cool sufficiently, the fuel also re-liquifies in the lines so that you have a more proper mixture when starting.

When the Summer formulas hit the pumps you may not have this problem until next Spring.

In the Fall, of course, while Summer gas is still in the pumps, there will be a period of hard starting for a while, because the Summer formula doesn't like to vaporize in the colder weather.

Life just goes around in circles...

An electric fuel pump might help now, but the Summer formula will be in the pumps soon and your trouble may be over.
(';')
 
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