Drivbiwire
Zehntes Jahr der Veteran
- Joined
- Oct 13, 1998
- Location
- Boise, Idaho
- TDI
- 2013 Passat TDI, Newmar Ventana 8.3L ISC 3945, 2016 E250 BT, 2000 Jetta TDI
My car has really been stinking like a diesel lately and after I had checked it at the Salt Lake Get together I figured what the heck it's time to adjust the timing. After I test drove it after the adjustment the diesel smell was reduced drasticly. I think once I get it out on the highway this will help get rid of the soot in the tail pipe.
I have noticed that my power is a little sluggish from a start and the fuel economy has dropped a bit. When I checked the timing at the GTG it was retarded and close to the limit of the adjustment scale. I checked it this morning and it was exactly where it was 10,000 mile ago. I have 53,000 miles and the belt is going to be done soon. I figured I could adjust it to the other end of the spectrum to see how much better it performs. This way I am limiting the factors that are being changed and have hard numbers on how much of a difference the timing will make.
I have been getting around 42 mpg while driving at 75-80 mph with the cruise set and AC running.
at the start of the adjustment the timing was 33 and 109 on the temp. at the end of the adjustment I had 63 and 130 on the temp. If you look at the graph in the bentley manual as the temperature of the fuel rises the timing index number drops off. In the center of the chart is a "C" scale I believe that this is where VW wants the timing set for emissions purposes. Where I now have mine set it is above the "C" scale. This is still within prescribed limits per the manual this will just advance my timing a bit and hopefully improve my power and economy at higher speeds.
I will let you know how well it works I'm getting ready to drive back to Dayton from Chicago the total distance is 262 miles of straight flat highway. I will top-off and vent the tank and top it off again when I get to Dayton. This will be a good indicator of how much affect the timing has.
DB
I have noticed that my power is a little sluggish from a start and the fuel economy has dropped a bit. When I checked the timing at the GTG it was retarded and close to the limit of the adjustment scale. I checked it this morning and it was exactly where it was 10,000 mile ago. I have 53,000 miles and the belt is going to be done soon. I figured I could adjust it to the other end of the spectrum to see how much better it performs. This way I am limiting the factors that are being changed and have hard numbers on how much of a difference the timing will make.
I have been getting around 42 mpg while driving at 75-80 mph with the cruise set and AC running.
at the start of the adjustment the timing was 33 and 109 on the temp. at the end of the adjustment I had 63 and 130 on the temp. If you look at the graph in the bentley manual as the temperature of the fuel rises the timing index number drops off. In the center of the chart is a "C" scale I believe that this is where VW wants the timing set for emissions purposes. Where I now have mine set it is above the "C" scale. This is still within prescribed limits per the manual this will just advance my timing a bit and hopefully improve my power and economy at higher speeds.
I will let you know how well it works I'm getting ready to drive back to Dayton from Chicago the total distance is 262 miles of straight flat highway. I will top-off and vent the tank and top it off again when I get to Dayton. This will be a good indicator of how much affect the timing has.
DB