[DeTomaso] Vegas Drive Day 13

[F&D Terry]

Dave,

If you are using the original fuel pick up tube,  your problem could 
easily be vaporizing fuel. Fuel injection pumps require much more fuel 
than the ones used for carbureted engines. They should be operated as a 
pusher pump, not as a suction pump. Your installation sounds as if your 
pump is operating with a long small diameter tube on the inlet or 
suction side. This lowers the pressure on the inlet side of the pump 
which lowers the boiling point of the fuel and causes fuel vapor to 
form. This can be remedied by placing your pump in the tank or 
underneath the tank with the shortest length of dash 10 line possible.

As you drive your car, fuel is circulated across a hot engine and 
returned to the gas tank. The more you drive the hotter the fuel in the 
tank gets making it easier for it to vaporize under the low pressure in 
the fuel pump suction line.

Fred T.

David Tucker wrote:

>Day 13
>
>4/30/2007
>
>Lucky 13
>
> 
>
>Today rather than going out on the highway to see where we would break down,
>we went right to a old fashioned service station in St George. The snootier
>service people said they couldn't help. I explained my problem to Bill and
>D. A. and they took it right in. It wasn't 15 minutes before D.A. came over
>and said that's vapor lock. Some people at the rally suggested that and then
>dismissed that since it was fuel injected. Me, I've never dealt with it
>before and didn't understand the whole concept. Now I understand and it all
>makes sense. When Bill called his parts supplier and asked her to pull a
>miracle out of her butt for tom kind of shield to wrap around the fuel
>system she said that a friend of hers has a Pantera that had the same
>problem.  The solution was to use the header wrap on the fuel system. He
>ordered it, it came, he had to finish the other car he was working on, then
>he wrapped mine all up and put it back together. We went for a test drive.
>In other words, I had to give him a ride:-). The cost for this service,
>$95.63, the cost to replace everything else that didn't need to be replaced
>this weekend, +-$700.00. We left St George at 5:30 in the afternoon. We
>stopped in Pocatello, Idaho at 1am. We made out pretty good for a late
>start. Looks like we will make it to Yellowstone after all. 
>
> 
>
>Not much sleep will be had tonight,
>
>Dave & Kathy
>
> 
>
> 
>
>467.8 miles today
>
>5082.9 total so far
>
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