ATF smooth, Diesel rough!
 

Hello guys!

I would like to hear your opinion about this. Two days ago I changed my engine oil and while doing that, I decided to try to clean my injectors using ATF. I readed this was possible due to the detergents the ATF has.

I made a little fuel tank from a gallon and poured 2 quarters of ATF and completed the gallon with Jet-1 fuel. I had the engine burn half of the gallon and the idle got really really smooth and quiet. I poured the remaining half gallon in my fuel tank (which was a 1/3 full) and the car was running like it never did before!

Yesterday I filled my tank with normal diesel and now the anoying nailing noise from the injectors is back!!! :mad: :mad: :mad: :mad:

Why could this have happened?

Did you have the injectors tested for pop pressure and spray pattern?

nope, my experiment was that, a simple experiment.... :o

You know, I was there, waiting for the engine oil to drain.... I saw an empty gallon container, the atf quarts... I recalled having a couple of Jet-A1 fuel somewhere in the warehouse....

With the mix I did, the engine was running incredibly smooth! I was very very impressed with the smoothness and the quietness of the idle.

A Diesel will run very quietly and smoothly on ATF, that should not be a surprise.

Using ATF frequently has been known to coke injectors.

Using ATF has done nothing but clean mine out. Of course I only add mine when I change the fuel filter. I top off the fuel filter with ATF before I screw it on then purge the system of air like you should when changing the fuel filter. The other method is to just add a quart to the fuel tank and drive it.

Maybe you got air in the system?

The 616 and 617 will run very quiet on ATF, veg oil, motor oil and just about any other thicker oil you would add to the fuel. Why? I dont know. The engine sounds much better- but that certainly does not mean it is better for the engine. Even 1/2 gallon of any of these "fuels" will quiet the engine when added to a full tank. The louder engine will return when the oil is no longer burned. Same event occurs when cleaning the injectors with diesel purge.