jmodge
Top Post Dawg
- Joined
- Jun 18, 2015
- Location
- Greenville, MI
- TDI
- 2001 alh Jetta, RC2 w/.205's 5speed daily summer commuter and 2000 alh Jetta 5spd swap, 2" lift, hitch, stage 3 TDtuning w/.216's winter cruiser, 1996 Tacoma ALh
I was going to add to an existing recent thread but couldn't find it so I started a new one.
Donna's car was throwing this code, with advanced timing off the chart and noisy throughout the rpm range. Also, the duty cycle for the N108 was stuck at 2.8%. Cold start timing actual was above specified.
After cycling the N108 in output tests I could see my timing fluctuating in block 2 of the chart, as the N108 still cycled after I backed out of the output test. When I hit basic settings to get to the timing graph, the N108 quit cycling. The timing was still way advanced, but it showed on the chart until I hit the throttle and it resumed it's off the chart advanced position.
I ran the same tests on my car and noticed the duty cycle of the N108 varied with rpm and load.
I didn't feel like pulling the pump to get at the N108. Always preferring the easy way out, I thought I would try something.
Her car was due a filter, so I filled the new filter with Liquimoli Diesel Purge. I found a drift and hammer that would reach the case where the N108 is housed. I opened output tests and started the car. I then cycled the N108 with VCDS and tapped on the pump case. I did this three times. When I went to measuring blocks and checked specified and advanced timing, they were the same. I took it for a run and the duty cycle for the N108 was happy again!
FYI, only symptoms were the engine code and noisy pump. The code did not always show a lamp.
Hopefully, this can help someone else free one of those up also, I was damn glad to not have to pull that pump.
Donna's car was throwing this code, with advanced timing off the chart and noisy throughout the rpm range. Also, the duty cycle for the N108 was stuck at 2.8%. Cold start timing actual was above specified.
After cycling the N108 in output tests I could see my timing fluctuating in block 2 of the chart, as the N108 still cycled after I backed out of the output test. When I hit basic settings to get to the timing graph, the N108 quit cycling. The timing was still way advanced, but it showed on the chart until I hit the throttle and it resumed it's off the chart advanced position.
I ran the same tests on my car and noticed the duty cycle of the N108 varied with rpm and load.
I didn't feel like pulling the pump to get at the N108. Always preferring the easy way out, I thought I would try something.
Her car was due a filter, so I filled the new filter with Liquimoli Diesel Purge. I found a drift and hammer that would reach the case where the N108 is housed. I opened output tests and started the car. I then cycled the N108 with VCDS and tapped on the pump case. I did this three times. When I went to measuring blocks and checked specified and advanced timing, they were the same. I took it for a run and the duty cycle for the N108 was happy again!
FYI, only symptoms were the engine code and noisy pump. The code did not always show a lamp.
Hopefully, this can help someone else free one of those up also, I was damn glad to not have to pull that pump.