swatman55

So the truck was getting 12.7ish MPG, before I took her off into the woods on some extremely mild terrain, also known as my back yard. I drove the truck up over a rock that was maybe 12in tall and at a 90 degree angle to my truck, in order to get up and over it I ended up having the pedal on the floor. The next rock I found I did the same thing but after flooring it for maybe three seconds the truck wasn't making progress so I backed off and turned the truck around to head home. Fast forwards to now, my truck is getting 8 MPG and has a strong smell of gas emitting from it. Any idea of what I may have damaged while being a duface? The truck is running fine as it usually does, the only thing I noticed is that when in N if I get the RMP's around 5k (I was trying to address another problem) I can feel the petal shake under my foot, I'm not sure if this is baseline for my truck or not. Any ideas would be appreciated,

Thanks!

TLB4

Full throttle and rocks are never a great idea. Low range and picking a proper line is definitely a better way to go.
As for the gas mileage, if it smells like raw gas, it probably is raw gas coming out of your truck. I would check your gas lines and any of the fittings along the frame rail. Check as best you can the top of your tank too. Evap connections are just plastic connection and can break pretty easy.

What other problem are you trying to fix by revving it to 5k?

swatman55

Thanks for the response. And was pushing the revs to see if I was loosing oil at highers RMPs. I've been loosing about 1qrt/1000 miles, and it's not evident in the exhaust and it's not leaking.

the01kingranch

thats normal

Tackle

Fuel lines or tank would be my guess.

Wolvee

With no consideration for the fuel smell yet, make sure you didn't puncture a tire. Low tire pressure has been the cause of more than a few people's low mpg even though they'd never admit it online, lol. Depending on the tires you can be less than half total pressure and it can still look normal.

Jbrew

Yea that's what Ford says. I don't fully believe it, never have. Instead of using the word "normal", - they should of used the word 'okay'. It's closer to the truth lol.

Jbrew

GAS SMELL, -

I'm not sure what could get punctured bottoming out. The 4x4's have tank guards, thick steel. The lines are in the frame rail, then rout to the back of the engine over the transmission... They are protected.

The EVAP would be suspect since this line is on the outside of the frame under the drivers side. If damaged, your sure to get a CEL IMO.

Perhaps you caved in a converter ? That would explain bad mileage.

RoyBraddy

I would probably pull a battery cable and then turn on the light switch for a few minutes - this might reset your computer settings.... Never a good idea revving the motor that high for long periods of time...

Its also not a good idea to nose your manual shift JEEP up against a tree and slip the clutch to smooth out a new clutch either but some of us will do it hehe...

Roy Ken