MAXRPM
Veteran Member
Besides pop tasting for an ALH injector to find out if it is leaking, is there any other way or symptoms once injectors are torqued on engine that will telegraph any of them are leaking out? how do we find out?
That will only show differences between injectors. If all of them are leaking or all of them are worn out, you won't see a big deviation.You can look in vcds and check the injection balance field 13.
http://forums.tdiclub.com/showthread.php?t=376916
Good point, it is another way to see what's happening and if they're in spec.That will only show differences between injectors. If all of them are leaking or all of them are worn out, you won't see a big deviation.
BINGO!alternatively all four could be wearing "evenly"
That's what this deviation is all about- compensating for various imbalances. Injectors and nozzles aren't the only things affecting the balancing act (cylinder compression differences being a big contributor). And, I believe that it's possible that a speed sensor issue could cause a variation as well: the "ring?"
Depends, depends, and depends.I'll answer that question with another question(s). If injectors drip, would the glow plug get wet? Or could you simply probe the GP opening for a leak?
You can redneck pop test them on the car then leave it sit to see if it leaks.so the verdict is you can only detect the leak by pop testing injectors
Redneck way is to pull the injectors, one at a time, turn the line reconnect injector. Stick a pop bottle over it securely and have someone crank while you watch what happens.well I got these symptoms, white smoke at start up, smokey, and I pulled all 4 glow plugs and 1 was wet, now my car does not burn oil so oil is ruled out, does anyone have a link to Redneck inj testing or video?
Where does that continuous flow of fuel come from that drips out?Yes, an injector can leak after injection event because the holes are not shaped, or sized, properly. That's why we are concerned about it. If you think that compared to the Injected quantity, what can drip out afterwards is small, you're quite mistaken because it's continuous. The largest factor is that it drips onto the cylinder and wall, then during combustion ignites and burns a hole.
You still haven't splained where the continuous flow comes from. The pump will only supply so much each stroke.It's a drip, every time there's an injection event that lands on the metal.
Let me ask you how those tiny ants make a mound. They don't do it all once. Same as the Injectors leaking.
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The fuel pressure coming from the IP is a wave, not a sudden event. The injectorYou still haven't splained where the continuous flow comes from. The pump will only supply so much each stroke.
If the injector is leaking bad enough that it actually puts out drips that could hit the piston that cylinder would probably be dead and would certainly show up in the idle balance as was mentioned earlier.
These aren't common rail systems with a constant 10k psi or more on the injector.