Join Date: Jun 2009
Feedback Score: 0 reviews
Info on 86 F250 6.9L Needed
My grandpa-in-law has an 1986 F250 6.9L diesel with a large 3500lb camper that he let us use last weekend. The truck had been sitting for 2-3 years. New tires and batteries, and off we went.
I may be buying the truck off him; excellent condition with 94k original miles, however I do have a few questions/concerns about it.
During pulling, especially with the first tank of gas (first tank of gas was good, put new gas in it before I left), it didn't want to get over 55mph. On the way home, I could just barely touch 70mph (WOT), but it was a struggle. So it seemed to get better the more we drove it. Now, I do NOT need to go that fast, I'm just generally concerned about performance. I only had 3 gears I noticed (automatic); is that normal; am I missing a gear or did these come with 3-speed automatics?
Also, I got about 8.5mpg on my trip (was a 4-hour trip each way on the highway). I know it had a 3500 camper on it, and the camper kills aerodynamics, but what can one normally expect out of these engines? Perhaps a tune-up would bring things up a bit?
Speaking of tune-ups, any recommendations? A general Diesel noob, but have been reading quite a bit. Truck is in great condition; headliner perfect, AC Ice cold, seats in great condition, carpet spotless, so if I can get this motor going well I think I'm set. Note: The engine actually ran great, was just a bit surprised by the lack in power, fuel economy and speed (and that's with some already low expectations). Just want to know if that's below par for the engine, or if I need to reset my expectations!