syrjohn
Well-known member
I recently had my clutch and turbocharger replaced on my 2002 Golf TDI with 235,000 miles on it. I disconnected the SG before the work and reconnected after. Then soon after I noticed something strange about its operation.
I was driving along and noticed my Today MPG was just above 50 as I approached a 1/2-3/4 mi downhill so I did my usual downshift to avoid using the brake and let it coast in gear. When I got to the end I noticed I had lost about 1 1/2 mpg. This has never happened before. I decided to do a test on another long downhill by getting up to speed and putting it in 5th. I then switched to Gauge setting so I could get an instantaneous mpg reading. Then as I coasted down the hill I switched back and forth between in gear and out of gear. The mpg reading was roughly twice as high out of gear than in. This makes absolutely no sense. The reading should be much higher in gear since the rolling of the car is turning the engine over with no fuel. In fact, my older SG used to read 9999.9 when I coasted in gear.
Could they have set something wrong on my engine when they did the work?
I was driving along and noticed my Today MPG was just above 50 as I approached a 1/2-3/4 mi downhill so I did my usual downshift to avoid using the brake and let it coast in gear. When I got to the end I noticed I had lost about 1 1/2 mpg. This has never happened before. I decided to do a test on another long downhill by getting up to speed and putting it in 5th. I then switched to Gauge setting so I could get an instantaneous mpg reading. Then as I coasted down the hill I switched back and forth between in gear and out of gear. The mpg reading was roughly twice as high out of gear than in. This makes absolutely no sense. The reading should be much higher in gear since the rolling of the car is turning the engine over with no fuel. In fact, my older SG used to read 9999.9 when I coasted in gear.
Could they have set something wrong on my engine when they did the work?