Ok, twice now this has hapenned...
The car (1996 jetta 1.9TD AAZ) is cold, I pull out of a parking lot, merge into traffic with a fair bit of throttle. The car makes a horrible sound, loses all power and starts to smoke (blue) REALLY badly. Barely idles... aweful sounds like bottom end noise. If I wait 10 minutes it starts a little rough but runs fine. Or, immediately after it happens, if I hold it at 2500 rpms for a little while it smokes a lot and then clears up.
Any ideas?
Any abnormal oil consumption? Many miles on the car?
A stuck or leaking injector nozzle can make a nasty rapping noise, you would swear a rod was coming through the block. It can also cause considerable smoke. Unusual for it to "fix" itself though...
The car has about 300k... not sure though; the odometer is busticated. No significant oil consumption.
I just replaced the injectors. Smog installed the GTD nozzles. And yeah, the smoke and racket goes away after a 10-15 seconds at 2500 rpms.
Quick TD... you've described the experience though... the first time it happened I thought the valves & pistions were in a death match.
A couple more considerations:
-I just replaced the timing belt, the timing is still slightly retarded.
-I've been noticing more Turbo whine lately... but this could be because I just replaced the downpipe and don't have as much exhaust noise.
-I run the car on waste vegetable oil. However, both times this has happened I was on diesel.