Hey All
I just took my 46 2 ton for a long drive.
I drove from Hayward CA to Modesto CA to see how it would do.
Its 50 miles one way. And goes over the Altamont Pass which is about 1,000 ft.
Coming back, about 3/4 of the way up, my truck started to miss, then ping, then backfire. I slowed down, pulled over, drove about 40mph for a bit, took it out of overdrive and drove the rest of the way up the hill at 3k RPM in direct drive (its a 261 engine).
Any thoughts on what caused this?
Im guessing my truck is running lean and the full throttle long run got the engine too hot. (water temp stayed low). Either that or the fuel pump cant handle the volume (I have 2 carterYF2100 carbs).
The thing that is new for my truck in this scenario is the full throttle long uphill run. The pass is probably 10 miles long.
Also, the driving was all high speed driving on freeways. I was constantly driving 55-65MPH (the truck as an overdrive). Its the farthest I have driven my truck.
