Cackle not just air in fuel?
#91
02-13-2014, 07:51 AM
Hotshot
UH? Now I need to find out if I can make it stop.... Shortcut to the answer (after 1/2 hour of tinkering) - KOER did it. KOER jacks the ICP up to 2200 PSI at idle and blows the oil rail clear of remaining bubbles. If I'm right, this explains the intermittent nature of the injector cackle: A hard throttle would frequently introduce the cackle, and it would take a long time to clear. I couple this with the suspicion that my LPOP is weak and I have the potential for a "Eureka" moment.
Thoughts?
Thoughts?
(KOER) Key on engine running cleared the bubbles? What am I missing here? How did you get the ICP to go up to 2200psi?
#94
02-13-2014, 07:55 AM
#95
02-13-2014, 07:56 AM
Hotshot
But KOER is just the state of the engine for the test, you must do something with AE to actually jack up the ICP with the engine running.
#97
02-13-2014, 10:42 AM
With the amount of us NOT having an AE or do, and have to come here to find out EXACTLY what it means or says..(which in my case, still atta loss), take in the cost, of an AE, that $$ can be applied to your plane fare..(far in advance so cost is cheap), coupled that up with your price for a day or 2, also housed at ones' property..(sure theres a room or 2 not being used at said home)....i see a purdy profitable and vacational, experiencing the country, oppurtunity....hell, i'd pay. Just with the VERY small limited knowledge of what the "numbers' are that popped up on my buddy's aeroforce, i feel little more warm and fuzzy inside, sleeping at night...haha.....guess it be a great idea for a single/bachelor dude for a side gig.....anywho, keep up the good work.....now back to regularly cackled program.
#98
02-13-2014, 11:14 AM
#99
02-13-2014, 11:28 AM
I already have that tee shirt... but not with diesels. I was a field troubleshooter for a global company. I've been to... uh... seven countries on three continents (not as impressive as our men in uniform, but pretty intense without Uncle Sam). I tried totaling up the cities/towns one time, but I gave up after 250. I was sooo grateful to learn a local company needed all my skills in-house. The offer came two days after a close call in Guatemala.
#101
02-13-2014, 04:43 PM
It's nice in the summer. I was there immediately after the bridge collapse, as well as a number of other times... I still have the photos. Welcome to Minneapolis/St Paul... home of Garrison Keillor, and gateway to Red Wing.
#102
02-13-2014, 08:13 PM
Hotshot
Ah I see.
I think I heard you can adjust the IPR in AE and essentially set it full closed (or 99% or whatever it goes to) and pump full pressure. I hear a way to test the HPOP and possibly like you mentioned to flush the lines after injector work.
#103
02-16-2014, 07:38 AM
Post Fiend
Just to add some additional info to anti-foaming or foaming in Diesel oils. There are three sequence test under ASTM D-892 test that an API certified oil must go through along with a high temp foam test ASTM D6082. If you can find the technical data sheet on the oil you use you just might find the results of these tests. it's been almost 5 years since I've worked for Schaeffer's Oil so some of my knowledge is no longer in my short term memory. But I still have many of my resources lying around and I remember this being a very hot issue here and on PSN when folks were running dual HPOPs and high ICP programs (3,200+) and in the 6.0L. Here is an example (an example - not a push for Schaeffer Oil). Schaeffer's has always publicized there test results. If you look at page 4 on this PDF you can see the tests listed that I mentioned. I'll look up the minimum standard for diesel oils and I think I have the Motorcraft stuff still. But IIRC this is one of the reasons (foaming agent depletion) that Motorcraft recommended 3-5,000 mile OCI's. Sorry I am 6 month late to this thread 
http://www.schaefferoil.com/documents/222-700-td.pdf
http://www.schaefferoil.com/documents/222-700-td.pdfASTM D 892 test procedure is to measure this foaming tendency of the oil.This test includes three sequences and each sequence has two portions.
Sequence - 1 at 24°c (@ 75 F) (sample 1) Sequence - 2 at 93°c (200 F) (sample-2) Sequence - 3 at 24° (sample - 2 again)
1st portion - air blowing into the oil for a period for 5 minutes 2nd portion - settling period for 10 minutes
Why are the results posted as 0/20 or 0/0???
Example , a 20/0 ml result for sequence 1 means, 20 % of foam measured while air was blown into the sample for 5 minutes and 0 in this example means the stability of that foam after 10 minutes settling period is 0 %.
The specification for CJ-4 Diesel Oil (what we have been using since the use of ULSD) allows up to 10% foaming at the lower temp (75 F), and up to 20% foaming at the higher temp test
(sequence 2)
CJ-4 foaming specifications :
Foaming (D 892) Foaming / Settling
Sequence I, max % 10 / 0
Sequence II, max % 20 / 0
Sequence III, max % 10 / 0
#104
02-16-2014, 08:16 AM
Post Fiend
So if the oil you are using starts out with a 10-20% foam sequence it wouldn't be hard to imagine that, that # could increase as additives are depleted. Could this be the reason why the cackle is louder on a hot engine with oil that has been used for longer periods? I don't think it too far fetched......
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