fuel mileage
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Freshman User
Joined: Sep 2003
Posts: 35
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From: South Jersey
fuel mileage
Hello,
I have read many posts on hereabout fuel mileage, and I still have a question. I have a 1989 Bronco with the 351 engine. I have tried to increase my mileage by doing the following:
New Accell coil
New Autolite plugs (gapped to .044)
New Autolite wires
New rotor
New cap
timing checked and set
and as an FYI
New Monroe shocks
New Bridgestone dueler Revo's 31X10.50X15 (was 235/75/15)
and a new starter (was draining the batt some)
I have added fuel injection cleaner multiple timers since I bought it in January 2006
it has 105000 miles
I just drove it over 800 miles on a trip and am getting 12 miles per gallon
I have been told to try increasing my spark plug gap to 0.054 and bumping my timing two degrees as long as the engine doesn't ping.
I am not expecting a miracle, but I think I should be able to get 14 mpg
any thoughts
Thank you,
Mike
I have read many posts on hereabout fuel mileage, and I still have a question. I have a 1989 Bronco with the 351 engine. I have tried to increase my mileage by doing the following:
New Accell coil
New Autolite plugs (gapped to .044)
New Autolite wires
New rotor
New cap
timing checked and set
and as an FYI
New Monroe shocks
New Bridgestone dueler Revo's 31X10.50X15 (was 235/75/15)
and a new starter (was draining the batt some)
I have added fuel injection cleaner multiple timers since I bought it in January 2006
it has 105000 miles
I just drove it over 800 miles on a trip and am getting 12 miles per gallon
I have been told to try increasing my spark plug gap to 0.054 and bumping my timing two degrees as long as the engine doesn't ping.
I am not expecting a miracle, but I think I should be able to get 14 mpg
any thoughts
Thank you,
Mike
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Joined: Dec 2005
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I get around 12mpg on the highway. It's an 83' with a 5.8l, 31.5x15, 3.55 gears and she's pretty much stock, except of an Edelbrock Carb/ Manifold, I ditched the clutch fan and went with a flex fan, hoping for better cooling. A/C works great The engine is fairly new, about 12k. I dropped all the fan belts and went serpentine and added duel exhaust. I don't see much better the 12mpg in my future, but it's a Bronco and It's fun to drive. I have an electric fan and I want to install it soon.
Postmaster
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From: MD
Originally Posted by skippydo
I ditched the clutch fan and went with a flex fan, hoping for better cooling.
Fleet Mechanic
Joined: Mar 2005
Posts: 1,603
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From: St Louis
Fuel mileage is acheived by a variety of things. Good engine tune being number one, next the gearing and tires (high gears and narrow, short tires = low rolling resistance), quality fuel, and finally the way you drive. Spirited driving in stop and go traffic lowers your fuel mileage. Accelerating at part throttle instead of WOT, driving speed limits, not pulling anything, low vehicle weight, running approxiamately 28-30" tires instead of 44s. Fuel mileage is not only in the vehicle but the driver's ability.
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Freshman User
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From: South Jersey
thank you for all of the input. pwcharlie and alxsnmr you both brought up a good point. I use cruise control whenever I can, I do not take off fast from a light, etc. Also, for gearing, my axle code is 'K'. not sure what gear ratio that equals. also, I have the AOD transmission
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From: MD
Originally Posted by skippydo
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Ford Parts Specialist
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From: Simi Valley, CA
Originally Posted by Jermafenser
The flex fan just spins hopelessly forever.
mpavlyik = K is not the axle code...an axle code is 3 digits. Are you sure you have an AOD?
The transmission code comes before the axle code on the VIN plate, and the letter K is the code for a C-6.
Both the C6 and the AOD were available on 1989 Bronco's.
Last edited by NumberDummy; Jun 4, 2007 at 03:28 AM.
Hotshot
Joined: Jul 2002
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From: Bend,OR
i suggest you do the timing and enlarge the gap on the plugs. also look into a drop in K&N filter, look into some shortie headers and bassani y pipe with hi flow cat running 3" exhaust from there out stock location with your choice of muffler. the stock manifolds and y pipe are very restrictive
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[QUOTE=NumberDummy]Not only that, but one of the blades can fly off at a moments notice, taking out anything it comes in contact with. That loose blade becomes a boomerang under the hood.
Thanks for that information, I did not know that. I have an electric fan that was a project for this summer, guess I'll install it now.
Thanks for that information, I did not know that. I have an electric fan that was a project for this summer, guess I'll install it now.
Thread Starter
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Freshman User
Joined: Sep 2003
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From: South Jersey
thanks NumberDummy. I took another look at the axle code... I had reversed it with the trans code. but the axle code only lists two digits... not three. It says '18' for my axle code. could one of the numbers have rubbed off or something?
Fleet Mechanic
Joined: Mar 2005
Posts: 1,603
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From: St Louis
Easiest way to figure gearing is to crawl under the truck and get it off the metal tag on the pumpkin. Assuming that the tag is still there as well. The front and rear axles should have roughly the same ratio but the rear may or may not have a limited slip differential. The door tag is nice and so is the metal pumpkin tag but if you are not the original owner who knows what the po put in or didnt put in. There are other methods of figuring out ratio at the pumpkin, but not nearly as accurate.