Ironman03R
Full Access Member
See how much blow by you have from the oil fill with engine running. Mine did same thing before it died from low compression.
4-5 mpg on 7.3 w/banks turbo
- Thread starter Chrismohan
- Start date
Whers did u get ip from?
Macrobb
Full Access Member
My guess is that fuel has to be going into the other fuel tank then(usually if it sticks, it pumps from the front and returns to the rear).
If the engine is running at all decently, 4-5 MPG is basically not possible, unless you were running the engine flat out for hours on end - like pulling a long long grade in 2nd or 3rd... for hours on end.
Nothing is impossible.
Well perhaps but there is something amiss.brb.
Well perhaps but there is something amiss.brb.
Fuel has to be going on the ground somewhere by the gallons to see 4 or 5 mpg.A reman IP isn't going to restore 10-15 mpg.
Ok try filling the tanks till they settle the bubbles, and you see fuel in the filler neck on both tanks... Reccord odometer.
Start on rear tank as suggested above,Drive till tank is empty, if switching valve is bad ,the front tank will have puked its overload.
If not fill rear to top of neck and switch to front tank and repeate process....
Record mileage after the front tank is dry.
Report back.
Start on rear tank as suggested above,Drive till tank is empty, if switching valve is bad ,the front tank will have puked its overload.
If not fill rear to top of neck and switch to front tank and repeate process....
Record mileage after the front tank is dry.
Report back.
Now if your part of the country is prone to road weasels all bets are off.
Ok
Do fill in the sig line with the details of your rig so we can see what we are talkin about.
My 88 with 4:10'$ and a c-6 and 1size over tire would get 5-7 when i got it, it never left town and was neglected.
I set the timming FIRST.
I ran alot of snake oil thru it got it up near 10...
New moose pump and inj.helped a small bit.
Best thing I did was load it down and pull a big grade on califs priest grade i to Yosemite.
My 93 had 37k on it when I came over the grapevine on califs 5, best of 14, best recorded ever.
Again ymmv.
Do fill in the sig line with the details of your rig so we can see what we are talkin about.
My 88 with 4:10'$ and a c-6 and 1size over tire would get 5-7 when i got it, it never left town and was neglected.
I set the timming FIRST.
I ran alot of snake oil thru it got it up near 10...
New moose pump and inj.helped a small bit.
Best thing I did was load it down and pull a big grade on califs priest grade i to Yosemite.
My 93 had 37k on it when I came over the grapevine on califs 5, best of 14, best recorded ever.
Again ymmv.
jwalterus
Made in America
I'm waiting to see it pop up in his sig as something like "88 L7000, 7.3, 12' utility bed"
rhkcommander
Full Access Member
make sure the brakes aren't dragging at all, axle condition and alignment can make big differences too. If there is any extra resistance it sucks up power and fuel.
I thought of that too but to cause a 10mpg decrease,the brakes would be on fire and the tires would probably need to be turned completely sideways and dragging.
rhkcommander
Full Access Member
Too true , just thinking that AND horrible timing along with leaking injectors and return line adds up. Assuming the gearing is right for the odometer/speedo. 4.10 vs 3.55 gear could skew it some.
, just thinking that AND horrible timing along with leaking injectors and return line adds up. Assuming the gearing is right for the odometer/speedo. 4.10 vs 3.55 gear could skew it some.
Gps phone speedo....is what I confirm my speedo with for speed but if out distamce is too ...cant fix that wo regear or tyre size change.
