loss of 6-8 mpg randomly
#11
The calc on my car claims I get 12 mpg's... and I know that isn't true. Plus, everytime it tells me I'm low on gas, with about an 8th of a tank left, my car only takes 9 gallons at most... Don't trust the computer all the time. Its only there as a guide I've come to realize.
#13
6th Gear Member
It almost sounds as if your onboard is calculating based on some inaccurate parameter such as gears or tire OD; things that can be changed with a hand-held tuner. Has a shop or anyone connected anything to your OBD port? In order for the onboard to suddenly begin indicating that much of a change in fuel mileage, either a sensor is malfunctioning or you have something REAL going on.
Hand calculate at each FILL-UP;
mileage at current fill-up - mileage at last fill-up
gallons added
Hand calculate at each FILL-UP;
mileage at current fill-up - mileage at last fill-up
gallons added
#14
Something I've noticed a few times, is that the gauge will read incorrectly, and slowly make it's way back up to it's appropriate place.
For instance;
I replaced my fuel filter. Filled up my tank. And it read Empty. It slowly crept back up to full after driving.
I also sat and idled for about an hour. (Don't ask why..it involves a woman.)
I get in the driver's seat, and it tells me I'm on E, but I knew I had about a quarter tank.
And earlier tonight, I had a hard takeoff, and was pretty much going WOT 70% of the short drive I had and it again told me I was near E, but knew I had over a quarter tank.
The gas gauges on our cars have issues.
For instance;
I replaced my fuel filter. Filled up my tank. And it read Empty. It slowly crept back up to full after driving.
I also sat and idled for about an hour. (Don't ask why..it involves a woman.)
I get in the driver's seat, and it tells me I'm on E, but I knew I had about a quarter tank.
And earlier tonight, I had a hard takeoff, and was pretty much going WOT 70% of the short drive I had and it again told me I was near E, but knew I had over a quarter tank.
The gas gauges on our cars have issues.
#15
I filled up the other day and went on a spirited drive out in the country. Within 20 minutes my fuel light came on. Course, I knew that that was bull, so I kept driving, albeit slower, and the gauge eventually came back up almost to full.
#17
#18
6th Gear Member
Besides folks like me wanting to bust your head, then your head UNIT (despite the fact that I grew up on Tull, specifically the Thick as a Brick album), it also affects the fuel gauge and the onboard calculations. There's something about it in either the OM or the shop manual; can't recall which...
#20
6th Gear Member