So I bought a 93 W350 online sight unseen. The price was still ok once I got the truck, but I was really ****** about how the guy said it was 100% ready to take it on my 1300 mile trip to Maine as soon as I got it.... (Lights out, tranny shifting in and out of O/D, brakes spoongy, etc.)

Anyway. Odometer is broken, and I forgot to reset my GPS odo.... got approx 350-400 miles (closer to 350) until the fuel light came one... 24 gallons later, I figured less than 15 mpg!!!! It has 3.54 rear end, all tires have good pressure.... maybe 2500-3000lb in the back, all highway at 70-75 mph. Does this sound really low? The truck didn't emit the light wisp my 89 does at 75 either.

Anyway. I know about the TPS thing, is there a way I can bypass it for the remaining 1000 mile leg of my trip. I don't have much for tools other than a basic wrench set on me. I don't have the stuff here to solder the POT on there either, even though I guess I could twist wires and use electric tape for a temporary fix.

Is 75mph too much for this truck? I know I'll get better mpg at 65, but I didn't figure I'd get only 15 mpg with this truck.

There is a slight sucking from the fuel cap when I remove it... Usually that means a plugged vent, is it vented through the cap?

I'll have more questions later I'm sure when I start to make the truck prettier once it gets home.... but thats for a later date.

 

For your o/d problem you can get a two pole switch and ground it to the frame and then get another wire and hook it up to the orange wire with the green chaser and plug them into the switch. they can only go one way and if you have them backwards then just switch them and you will be on your way. any faster than 45 i would say to flip the switch, and any slower flick it to shut it off or your tranny would shift from 1-2-4 and will skip 3rd. when you get home put a potentiometer in and it only costs 5 bucks and workes beautiflly.
Hope this helps, Kyle

 

I know my 93 D350 auto with 3:54's is screaming at 75mph... i get my best mileage around 65-67...

I think 15mpg at 75mph isnt too too terrible, compared to my 18 mpg empty at 70mph.....especially if youve been running that sped w/o the OD.. your rpms must be riding right at the govenors limit.....

91.5's got he right idea for a temp fix on teh OD, there is info in the stickey onteh switch as well..

teh fuel tank isnt vented through the cap, and getting a slight vacum is normal if you've been running it for awhile.. I've seen that in all 3 CTDs i've had...