Mileage bad since engine job
#1
Mileage bad since engine job
Hello,
Just spent the last two years doing tons of work on the truck (head gasket, cam, suspension, hoses, A/C, cruise, body work, fluid flushes, tires, etc., etc.) and now my mileage is down about 1/2!!!!!
I'm sure I used to get around 13-15 mpg, 300 miles per tank.
Now I'm getting:
186.2 miles 81.5 L = 21.5 gallons gives 8.66 mpg
159 miles 75.7 L = 20 gallons gives 7.95 mpg
(I always run the A/C in econ to conserve fuel - that's right isn't it?)
Any suggestions...thanks!
Just spent the last two years doing tons of work on the truck (head gasket, cam, suspension, hoses, A/C, cruise, body work, fluid flushes, tires, etc., etc.) and now my mileage is down about 1/2!!!!!
I'm sure I used to get around 13-15 mpg, 300 miles per tank.
Now I'm getting:
186.2 miles 81.5 L = 21.5 gallons gives 8.66 mpg
159 miles 75.7 L = 20 gallons gives 7.95 mpg
(I always run the A/C in econ to conserve fuel - that's right isn't it?)
Any suggestions...thanks!
#3
#4
Cam: 4.6 Motronics camshaft from PT Schram (told would increase power without effect on mileage, as recommended)
Wires: STI721 Spark Plug wires from PT Schram (as recommended)
Plugs: 4418 Bosch Platinum +4 (as recommended)
I don't have a scanner but I can ask my mechanic if he does...? What are we looking for?
Wires: STI721 Spark Plug wires from PT Schram (as recommended)
Plugs: 4418 Bosch Platinum +4 (as recommended)
I don't have a scanner but I can ask my mechanic if he does...? What are we looking for?
#8
The converter lock up is controlled by an electric valve inside the tranny. That valve (MV-3) is energized by the tranny computer when conditions are correct for lock up. The tranny computer would supply + voltage on connector 193 pin 32 a slate with orange wire. That would be under the seat with the computer. So you could set up a meter before test driving. To see if the computer actually signals for lock up. Which may not be happening if tranny computer and engine computer think your are driving in a manner that does not need lock up.
As for scanner, your mechanic's scanner will have the fields for monitoring open loop/closed loop fueling.
As for scanner, your mechanic's scanner will have the fields for monitoring open loop/closed loop fueling.
#10
Bigger tires will also makes your odometer read low(less miles than actually traveled). I checked mine against my GPS over a long trip. Figured out for every 10 miles of driving the odometer would register 9. Not huge but enough to account for at least a 1mpg difference.
Also, my gas mileage sucks right now because its winter and that means letting the truck warm up for about 10-15 minutes.
Also, my gas mileage sucks right now because its winter and that means letting the truck warm up for about 10-15 minutes.