Post electric fuel MPG - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 6 (permalink) Old 01-20-2009, 01:48 AM Thread Starter
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Post electric fuel MPG

I did a electric fuel conversion on my 96 and now that I'm running 65 psi, my MPG has gone to pot. No leaks that I can find. Wasn't expecting a big drop like this. Any thoughs?
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post #2 of 6 (permalink) Old 01-20-2009, 03:28 AM
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Re: Post electric fuel MPG

if the truck picked up a bunch of power...then maybe I could see it...but just adding an electric fuel system doesn't make the injectors flow more fuel...


that's definitely weird.

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post #3 of 6 (permalink) Old 01-20-2009, 03:47 PM
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Re: Post electric fuel MPG

When I converted from mech to electric I noticed a ~15% increase in fuel economy. At the time I was handfilling the tanks to the top every fill up and keeping meticulous MPG records. Part of my increase, I am sure, was the replacement of leaking fuel lines though...

Sam
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post #4 of 6 (permalink) Old 01-21-2009, 02:37 AM Thread Starter
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Re: Post electric fuel MPG

I think that after I though about it, fuel is leaking into the engine oil. An injector must be leaking around the o rings. My oil is runny. I'll have to pull the the injectors to see. Swamps says to check compression.
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post #5 of 6 (permalink) Old 01-21-2009, 05:56 AM
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Re: Post electric fuel MPG

Had the same thing happen and I was told that it was because you were now able to supply fuel to the heads in a constant volume. I was told that mechanical setup causes a ripple effect in the fuel thats in the rail when the injector fires, causing some what of a starving effect. An electric system provides constant pressure in the rail and can keep supplying instantaneously after the injector fires reducing if not eliminating the ripple effect. Hopefully that makes sense. Bottom line is I saw a slight decrease, about 1.5-2mpg in daily driving but no loss on the higway.

Cowboy Steve
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post #6 of 6 (permalink) Old 01-21-2009, 03:49 PM
 
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Re: Post electric fuel MPG

My truck seems to get about the same as before. I checked a few tanks and it was slightly less than normal, then another time I checked, it was the best ever.
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