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post #1 of 3 (permalink) Old 04-17-06, 10:45 PM Thread Starter
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Gas Hog

I have a 1990 MH with a 460 EFI & an overdrive trans . motor is in ex. cond . but the best mileage I can sqeeze out of it is 6 1/2 to 7 mpg . I've had a 1986 460 ci with a carb . & I got 8-9 mpg . Is this normal for EFI ?? Any suggestions on improveing my mileage . I do know how to drive to conserve fuel . Thanks AL

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post #2 of 3 (permalink) Old 04-18-06, 01:14 AM
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Re: Gas Hog

First get the line pressure checked, there is a vaccume controller on the fuel rail I have found that often sticks.

1990 may pay to remove the injectors and have them sonic cleaned as well.

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post #3 of 3 (permalink) Old 04-18-06, 07:42 AM Thread Starter
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Re: Gas Hog

Quote:
Originally Posted by garth04
First get the line pressure checked, there is a vaccume controller on the fuel rail I have found that often sticks.

1990 may pay to remove the injectors and have them sonic cleaned as well.
Thanks Garth04
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  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > 429-460 Tech


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