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General Information => Troubleshooting => Topic started by: addautomotive on October 26, 2005, 07:34:57 pm

Title: scary noises, lots of smoke
Post by: addautomotive on October 26, 2005, 07:34:57 pm

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?

Title: scary noises, lots of smoke
Post by: ricosuave on October 26, 2005, 08:29:33 pm

turbo?

Title: scary noises, lots of smoke
Post by: QuickTD on October 26, 2005, 08:37:14 pm

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...

Title: scary noises, lots of smoke
Post by: addautomotive on October 27, 2005, 05:43:32 am

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.