Quote:
Originally Posted by v8volvo
Great!
By needles I assume you are talking about the injector nozzles? You do not want to get those anywhere near water, any rust in them will really screw the pooch (there's another great English phrase to know  ). There are tools available to clean them, but if they are not moving freely and sticking, they really should be replaced. New nozzles are only a few bucks each... but maybe you are meaning something different by needles.
Either way, yes, a sticking injector will certainly cause the issues you were seeing. The hard starting and "choking"/inability to rev up is a good sign of the injection pump getting air blasted into it somehow. This is similar to what I had happen on one of mine a while ago. A good test for this that I discovered then, and should have thought to suggest to you now had I remembered it sooner, is to crack the fuel fittings at the injectors open one by one with the engine running. If you find any that seem to push a bunch of foam and bubbles out all the time when running, then you have identified a stuck injector that is filling up with engine compression/exhaust, and those will cause serious runnability problems.
Advancing timing is a good idea too; do that and get the injectors sorted and it should run smooth and clean. Good luck! |
Yeah , the needle in the nozzle was damn stuck ! i found that you call it "needle valve" here it's called "pointeau" .
i cleaned them with water
and powerful degreaser then rubing alcohol and i washed them with very fine oil (penetrating oil look a like)
i've soaked/ oiled them when i reassembled.
i've brushed them once complete and they are shiny
Here it's 22 euros a set of needle nozzle each.
that's make about 150 euros for six with shipping
cheaper where you live ?
I knew for the "crack loose" test but i thought i found the problem and cleaned them right after.
i didn't think to prove the problem by testing.
For the test the timing is at 0.85 if i'm right.
i will check the unload pressure of the injectors and the pattern first and then try to advance the timing to 0.90.
The engine ran the time of the vid below ,not more. and still smokes it needs more time to run to see where i have to tune it.
