Here's the story, back in October 2001 I got a DTC 1268 code (Quantity Adjuster - Upper Stop Spec) occured while coasting into a shopping mall. Took it to the dealer and everything checkout fine.
Yesterday while driving on the highway engine loses power, blinking glowplug light and check engine light comes on
. Pulled out the VAGCOm and same error. There where also Quantity adjuster - Control difference and lower stop spec interrmintent codes aswell. Cleared the codes, re-started and drove home.
Also noticing the past few days that I had rough riding between 1800-2000 RPM I decided to clean my MAF with non-resisdue electonics cleaner and all seems great, smooth ride, no codes
until 50kms on the highway. This time Quantity adjuster - Lower stop spec, Upper stop spec, engine dies pull over
. Restart car, clear codes and have very erratic idling, then engine revs to 2400 RPM, I turn the car off, still running
remove key
Looking at the CCV pipe to the air intake I notice oil residue, was the engine runing on oil vapours?
I fear the worst that I need a need to have the N146 Quantity Adjuster on the pump rebuilt at
www.rovandiesel.com. What else can I check, do, measure prior to ripping out the pump? The fuel filter only has 12000 kms on it, I run Amsoil diesel conditioner and centane boost, so I think the fuels OK, no air in lines.
Like a mentioned I have a VAGCOM and have the bently manual (CD here in a few days)so I can log some data if that would help. Reading all of the previous posts shead some light, but no real answers except to rebuilt the pump. I guess I jsut want to ensure that it is the pump.
Thanks for your help,
Dave