Has anyone listened to the video with the tick? What do you think? Cylinder 2 sounds very different from 3,4,5. Cylinder 1 is also slightly louder. So I switched this injector from cyl.2 with an injector from cyl.3. The loud noise went along with cylinder 3. Go to cyl.2
something else occurred to me:
Would it be possible for the FASS100 to pump air forward despite all of its filters and separation systems?
I noticed during the last injector leak test (transparent hose on the return pipe at the original filter place) that there are also small air bubbles with the return diesel. there was also a slight fog. like finely atomized fuel. At first I thought this hose sucked air in itself. then attached a clamp. air bubbles anyway.
but could be normal due to cavitation through this high pressure lekage that I am looking for all the time right?
Listened to audio, 2 does sound different are you sure all copper washers are installed on injectors?
Ohm test wires/injector solenoids?? see if any big differences.
From other videos, Some thing strange with rail pressure should try get data and plot see if a pattern shows when disconnecting specific injectors.
As far as air in fuel any leaks could cause issue should double check no supply side leaks
should make proper supply pressure 11 psi to CP3 if not check for restriction or pump issue.
Check for air in the fuel
Refer to Procedure 006-003. Operate the engine
at idle and check for air bubbles. If the engine will
not start, check while cranking the engine.
Note: Do not overheat the starter
Is air present in the fuel supply?
YES
Repair:
Locate and correct the cause of air ingestion
in the fuel supply system. Sources of air
ingestion include loose fuel filters, loose fuel
line fittings, loose or cracked fuel tank standpipes,
or severe restrictions in the fuel supply
lines and filters that cause cavitation at high
fuel flow rates.
Procedure 006-003
Air in Fuel (006-003)
General Information
A replacement of fuel supply lines, fuel filters, fuel
injection pump, high-pressure fuel lines, and injectors will
let air enter the fuel system. Air in the system can make
the engine hard to start, run rough, misfire, produce low
power, or can cause excessive smoke and a fuel knock.
A few bubbles exiting the line during the test is expected.
A foamy appearance is indication of a leak that allows air
to enter, a severe inlet restriction that causes cavitation,
or a system that is not yet primed. If fuel inlet restriction
(refer to Procedure 006-020) is not excessive, the source
of air entry should be isolated to one of the following:
• Suction fuel lines
• ECM cooling plate assembly (if applicable)
• OEM fuel lines
• Suction-side fuel filter assemblies
• Stand-pipe(s) in the fuel tank(s)
WARNING
Be sure that the fuel inlet and return valves are
returned to the open position before cranking engine.
Engine damage can result if valves are in the wrong
position when engine is cranked or started.
Environmental damage can also occur. Refer to
Procedure 005-999 (Fuel System Overview) in
Familiarization section for further information.
Test
3.9L and 5.9L Without Fuel Filter Diagnostic Test
Ports
NOTE: On quick-disconnect fittings with a white tang;
push in the white tang to release the fuel line.
Install the fuel pressure gauge adapter service tool, Part
Number 3164044, between the ECM cooling plate and the
gear pump.
Operate the engine at idle and check for air bubbles in the
clear line.
If air continues to bubble through the clear hose for
several minutes, then an air leak is present.
Collect fuel in a bucket or similar device.
Look for air bubbles in the fuel as it fills the bucket or
similar container.
If air continues to bubble through the clear hose for
several minutes, then an air leak is present.
