mpg issues.and other issues.
Member
Joined: Sep 2011
Posts: 90
Likes: 6
From: Victoria BC Canada
On a good day I can get maybe 15 mpg
I do as much basic maintence as possible on my truck too keep it up to date, but its killin me on gas
I've done a tune up, I've done a carb clean out, I've done a new air filter, I've taken the cat off(left the O2 sensor though), but I don't know what too do anymore....Would a cold air and flowmaster muffler do anything?
P.S.
Truck is a 90 f150 with the 4.9
I do as much basic maintence as possible on my truck too keep it up to date, but its killin me on gas
I've done a tune up, I've done a carb clean out, I've done a new air filter, I've taken the cat off(left the O2 sensor though), but I don't know what too do anymore....Would a cold air and flowmaster muffler do anything?
P.S.
Truck is a 90 f150 with the 4.9
Senior Member
Joined: Jun 2011
Posts: 360
Likes: 17
From: North Reading Ma
Hi Jake,
The one thing I would recommend is the Sixlitre tuneup. This tuneup was on the FSB forum and was intended for the 302. The standard coil was replaced with a hotter aftermarket unit, the wires were replaced with low resistance Ford Motorsports spirial core ones, and the spark plugs were copper core Motorcrafts gapped at .055 instead of .044. The base timing was advanced to 14 degrees BTDC, stock is 10 deg BTDC
On my 95 300 I used Autolite copper core spark plugs gapped at .050 instead of .044 and set the base timing at 12 deg BTDC. My engine pinged too much at 14 deg BTDC. I replaced the spark wires with Taylor spirial core low resistance ones. After market coils have a higher failure rate than the stock ones and the published voltages aren't much higher so I kept my stock one.
I can't really say it increased gas mileage because my plugs and wires were long overdue for replacement but it did increase about 2 MPG and the performance was noticable.
Your stock intake is already A Cai and if your exhaust is due for replacement look for high flow components and a 2.75" system. Keep your tires aired up and speed down. I have a dash mounted vacuum gauge that helps.
My gas mileage average is 16-17.5 overall with a best of 20 Mpg at 60 Mph and about 18.5 at 70
YMMV
rikard
The one thing I would recommend is the Sixlitre tuneup. This tuneup was on the FSB forum and was intended for the 302. The standard coil was replaced with a hotter aftermarket unit, the wires were replaced with low resistance Ford Motorsports spirial core ones, and the spark plugs were copper core Motorcrafts gapped at .055 instead of .044. The base timing was advanced to 14 degrees BTDC, stock is 10 deg BTDC
On my 95 300 I used Autolite copper core spark plugs gapped at .050 instead of .044 and set the base timing at 12 deg BTDC. My engine pinged too much at 14 deg BTDC. I replaced the spark wires with Taylor spirial core low resistance ones. After market coils have a higher failure rate than the stock ones and the published voltages aren't much higher so I kept my stock one.
I can't really say it increased gas mileage because my plugs and wires were long overdue for replacement but it did increase about 2 MPG and the performance was noticable.
Your stock intake is already A Cai and if your exhaust is due for replacement look for high flow components and a 2.75" system. Keep your tires aired up and speed down. I have a dash mounted vacuum gauge that helps.
My gas mileage average is 16-17.5 overall with a best of 20 Mpg at 60 Mph and about 18.5 at 70
YMMV
rikard
Last edited by rikard; Oct 2, 2012 at 01:14 AM.
Hi-Rev Motorsports
Joined: Aug 2009
Posts: 4,898
Likes: 65
From: Northern Indiana
On a good day I can get maybe 15 mpg
I do as much basic maintence as possible on my truck too keep it up to date, but its killin me on gas
I've done a tune up, I've done a carb clean out, I've done a new air filter, I've taken the cat off(left the O2 sensor though), but I don't know what too do anymore....Would a cold air and flowmaster muffler do anything?
P.S.
Truck is a 90 f150 with the 4.9
I do as much basic maintence as possible on my truck too keep it up to date, but its killin me on gas
I've done a tune up, I've done a carb clean out, I've done a new air filter, I've taken the cat off(left the O2 sensor though), but I don't know what too do anymore....Would a cold air and flowmaster muffler do anything?
P.S.
Truck is a 90 f150 with the 4.9
I'm running no muffler (full exhaust) and the stock box and tubing with a K&N drop in... I get 20 city and 24 highway without really trying....
there is plenty you can do... the quaetion is how much do you want to change it?
Senior Member
Joined: Feb 2009
Posts: 709
Likes: 31
From: Grants Pass, OR
On a good day I can get maybe 15 mpg
I do as much basic maintence as possible on my truck too keep it up to date, but its killin me on gas
I've done a tune up, I've done a carb clean out, I've done a new air filter, I've taken the cat off(left the O2 sensor though), but I don't know what too do anymore....Would a cold air and flowmaster muffler do anything?
P.S.
Truck is a 90 f150 with the 4.9
I do as much basic maintence as possible on my truck too keep it up to date, but its killin me on gas
I've done a tune up, I've done a carb clean out, I've done a new air filter, I've taken the cat off(left the O2 sensor though), but I don't know what too do anymore....Would a cold air and flowmaster muffler do anything?
P.S.
Truck is a 90 f150 with the 4.9
http://www.fueleconomy.gov/
I would not expect to get any better than that.
Also those who are running larger than stock size tires are getting a bit better mileage than what they calculate.
Member
Joined: Sep 2011
Posts: 90
Likes: 6
From: Victoria BC Canada
Would there be a slight change you think?