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#15
by
TylerDurden
on 18 Nov, 2013 05:11
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I'd also look at boost level at the point of trouble.
I would suspect the IP has some issue with the governor or enrichment linkage, but the injector testing is a good start to narrow the variables.
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#16
by
vako
on 18 Nov, 2013 14:44
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#17
by
bbob203
on 18 Nov, 2013 14:55
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Modify the governor while your in there!
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#18
by
vako
on 18 Nov, 2013 23:45
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i was thinking about the governer mod when i had the pump apart. but in the mud sometimes you need to have rev limiter which is gone after the mod
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#19
by
745 turbogreasel
on 19 Nov, 2013 02:06
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yes it does it in neutral too. but in neutral you can only see the engine move from side to side a bit, it is not felt while sitting in the car
You might be able to isolate it to one injector or delivery valve by swapping things around and running with one disabled.
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#20
by
vanbcguy
on 20 Nov, 2013 19:48
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The rev limiter is still there - I used a small shim and mine kicks in at about 4500 on my 1.6td. I don't think it will rev over about 4900 no matter what - at least I've never done it. Hmm... Maybe now that I'm done with the engine.....
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#21
by
8v-of-fury
on 20 Nov, 2013 19:55
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Stock governor should hold the engine at ~5350 with the foot to the floor in neutral from factory.
If you have modified the assembly to make the springs stiffer, this number will surely be higher.
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#22
by
vanbcguy
on 20 Nov, 2013 19:56
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Yeah I was talking about in gear pulling the car...
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#23
by
8v-of-fury
on 20 Nov, 2013 20:07
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I don't think it will rev over about 4900 no matter what - at least I've never done it.
And I read your mind how?
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#24
by
vako
on 21 Nov, 2013 05:38
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a little update, today i had my injectors tested... all of them were at 145
only second injector had changeable and not perfect spary pattern. but after 10-15 minutes of polishing paste spray pattern became almost perfect. mechanic said that there is no way this injector could be causing problem like yours..... after assembly car run just the same
no changes at all.
internal pressure is good, timing is set to 0.95-1,00 milimeters. it pulls just fine..... the only problematic thing left in transmission is the dif. yes it has whining noise but could it be causing the issue....
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#25
by
theman53
on 21 Nov, 2013 05:41
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If it will do it in neutral everything in the trans and transfer case is not relevant.
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#26
by
8v-of-fury
on 21 Nov, 2013 06:12
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I disagree, maybe not the diff..
But in neutral with clutch out the trans is still turning shafts and such.
Have you tried with the cl7tch in and the car not moving??
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#27
by
vako
on 21 Nov, 2013 09:49
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i've spent more than 600-700 $ on this engine and pump rebuild already (+ 600 $ for the engine itself
). a'm already thinking of leaving it alone
only option left (that will probably not change anything) is to increase internal pressure.
another question that i have: can bad hydrolifters cause this? i have knocking lifters that seem to be worn, but can they cause things like this ?
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#28
by
Mark(The Miser)UK
on 21 Nov, 2013 15:03
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a little update, today i had my injectors tested... all of them were at 145 only second injector had changeable and not perfect spary pattern. but after 10-15 minutes of polishing paste spray pattern became almost perfect. mechanic said that there is no way this injector could be causing problem like yours..... after assembly car run just the same no changes at all.
internal pressure is good, timing is set to 0.95-1,00 milimeters. it pulls just fine..... the only problematic thing left in transmission is the dif. yes it has whining noise but could it be causing the issue....
Has your mechanic actually witnessed your problem and concurred, or is he just going by your description?
Let's take this a step further... Do you have a camera that you can do a sound recording with?
If so can you place it about 4ft in front of the car [hood down] and record the engine at idle and then up to shudder point and just the other side. Link us to it and I'll see if anything shows up on that spectrum thingy of mine... 
Do a video of the same but with hood up and looking at the engine...
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#29
by
vako
on 25 Nov, 2013 10:26
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sorry for my late reply, after injector check i had injector leaking problem and after resurfacing the mating surfaces of nozzle and other injector parts wit fine sandpaper leaking problems went away
but twitching problem is still there. i even notice taht car doesn't run well on idle. it doesent misfire but i can feel that engine does not run evenly. even though at 5' celsius car starts without cold start lever and glowplugs after 2 hour rest... i will also check camshaft and IP timing in near future.
added a bit of interal pressure to the pump (so that "marble noise" is heared just a little bit in middle range). a am also planning on making internal pressure gauge to set the pressure as it is intended to be
in few days i will post audio files as MARK Uk told me.
i also have one more question, can bad hydro lifters be causing this issue? i have noisy lifters but never heard taht bad lifters may be causing twitching or other problems in diesel engines.... :|
