[wildcat79]

Need good honest mechanic to fix 1997 ford 7.3ps. Very hard cold starts when cold

[TxGreaseMonkey]

Diesel Fuel and Cold Weather

Wax, naturally found in diesel fuel, begins to form crystals, as the temperature drops. The cloud point is the point at which crystals form. Eventually, crystals clog the fuel filter and starve the engine of fuel or prevent it from starting.

Traditionally, one solution is to use #1 diesel fuel, which is diesel fuel diluted with kerosene. There are several disadvantages with using #1 diesel fuel, despite its advantage in low-temperature operations. First, the energy content is about 95% of #2 diesel fuel, resulting in less horsepower and reduced fuel economy. Second, the kerosene used in #1 diesel fuel provides less lubrication for the fuel distributor and fuel pump, increasing the likelihood for wear.

There are products on the market, such as Amsoil Diesel Recovery, that dissolve the wax crystals that form when diesel fuel has surpassed its cloud point. It will liquify gelled diesel fuel and thaw frozen fuel filters. Since diesel fuel quality varies wildly from one filling station to another, low-quality fuel can have cloud points as high as 40 degrees F.

Check these type of products out. They can reduce the cold filter-plugging point (CFPP) by up to 34 degrees F, in ultra-low-sulfur diesel fuel (ULSD), and up to 17 degrees F, in biodiesel. They also lower the fuel's pour point. Emergency diesel fuel treatments may help you avoid a costly towing charge.