Dieselworld
Veteran Member
- Joined
- Mar 8, 1999
- Location
- Atlanta, GA USA
After having the dreaded stumble or bucking on the first run of the day for the Tdi, I noticed that running cetane boost cured the problem. I have run 3 tanks of cetane boost from Amsoil and have not had one instance of the engine bucking in the morning. Nothing else has changed except that variable. Evidently the bucking is similar to a gasoline engine misfiring or running a to "rich" mixture. Since the engine is cold as well as the fuel the thermal efficiency should be at its lowest. The low cetane in the USA must agrivate this condition and give us the dreaded bucking. I can only deduce that increased cetane helps the fuel to burn quicker in a low thermal state. While this may not be the total "scientific" explanation to why this seems to cure the problem, on a cause and effect relationship it is working and continues to work.
If anybody else is having this problem give it a try and see if it helps you.
Chow
If anybody else is having this problem give it a try and see if it helps you.
Chow