alanack
Veteran Member
First post here....
So i bought this car in October 2021 because the price of fuel was killing me in my long owned and beloved 12v Cummins diesel Rams.... i commute 90 miles a day. Its 1998 Jetta AHU 5 speed
Anyways the car smokes like a friggen freight train..... since i got it. Normal throttle its grey-ish smoke, heavy on the foot its dumps out black smoke like an old mack dump truck.... car is a baby, has just over 150,000 miles on it.
When i bought it the PO replaced the pvc system, turbo, rad, some sensors.... and I further went through it, new vacuum lines, change over valve, glow plugs+ harness full timing belt service with WP, coolant& thermostat everything. Just changed the fuel filter with a filled with liquid moly diesel purge.
Timing verified using my scan tool a few times, ive put over 10,000 miles on the car and it doesnt seem to burn any oil, oil analysis reveals a slight fuel dilution (0.5% and sootly oil) poor combustion?
Other than smoke the car runs great, starts in single digits with ease, and has consecutively given me 48-52mpg US gal.... What gives?
On a side note i bought another one a 98 tdi that the engine was blown, so i had that swaped to a 1z by a reputable VW guy. because the original ahu dropped a valve... that car will not smoke no matter what you do, slight haze of idle on a cold start, but barely.
Im no stranger to diesels but this car has me stumped!
Thanks!
So i bought this car in October 2021 because the price of fuel was killing me in my long owned and beloved 12v Cummins diesel Rams.... i commute 90 miles a day. Its 1998 Jetta AHU 5 speed
Anyways the car smokes like a friggen freight train..... since i got it. Normal throttle its grey-ish smoke, heavy on the foot its dumps out black smoke like an old mack dump truck.... car is a baby, has just over 150,000 miles on it.
When i bought it the PO replaced the pvc system, turbo, rad, some sensors.... and I further went through it, new vacuum lines, change over valve, glow plugs+ harness full timing belt service with WP, coolant& thermostat everything. Just changed the fuel filter with a filled with liquid moly diesel purge.
Timing verified using my scan tool a few times, ive put over 10,000 miles on the car and it doesnt seem to burn any oil, oil analysis reveals a slight fuel dilution (0.5% and sootly oil) poor combustion?
Other than smoke the car runs great, starts in single digits with ease, and has consecutively given me 48-52mpg US gal.... What gives?
On a side note i bought another one a 98 tdi that the engine was blown, so i had that swaped to a 1z by a reputable VW guy. because the original ahu dropped a valve... that car will not smoke no matter what you do, slight haze of idle on a cold start, but barely.
Im no stranger to diesels but this car has me stumped!
Thanks!