I've had real problems in the past and present with air in my fuel system (ISX 475 CM870). I'm curious if anyone has installed a sight glass or comparable device on each side of the IFSM to watch for air. The shop uses a clear hose and screws it into the inlet and return ports. Would a rig like that be OK for permanent duty?
Permanent Sight-Glass for fuel line(s)
Discussion in 'Trucks [ Eighteen Wheelers ]' started by VisionLogistics, Dec 3, 2012.
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I used transparent fuel lines on intake.
VisionLogistics Thanks this. -
Things we've checked:
- all 4 actuators (timing and fuel)
- Anti drain back valves
- Bypass valve (on the back of the IFSM)
- Injectors (it now has 6 new ones still didn't solve the problem)
- New lift pump
- New fuel pump
- New fuel line on the inlet side
No air going into the IFSM. The shop is pulling off the IFSM body today and they're going to try swapping the entire module out to see if that fixes it.
The fuel in the return line coming off the IFSM is clean and not contaminated. If the head had a problem and was sucking air the return fuel would be contaminated with oil or coolant, yes?
This is a real mystery. -
return stream may damage line of wrong pressure rating. It is dangerouse
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VisionLogistics Thanks this.
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Cat makes a sight glass that gets put in line it would work and never leak. Its made out of very thick plexie glass round pipe.
VisionLogistics Thanks this. -
What makes you think it is air? Sometimes the most common problems cause biggest issue. You have changed everything but return lines which if plugged can cause engine to retain air/pressure thereby causing common problem. The amount of return fuel can fill a five gallon bucket in about two or three minutes and if the return is plugged it will cause same faults.
VisionLogistics Thanks this. -
Each shop has thrown thousands of $$ worth of parts at the problem and it's still not fixed. I'm at a point where I need to cut my losses and get her back to work.
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