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8,014 Posts
I had started this while at sea couple of weeks ago but Dave beat me to it
Grounds, Grounds, Grounds
“All I ever hear here is check my grounds”
Are you having white smoke on startup, slow cranking, errant voltage to lift pump, dim headlights, IP sometimes acts like the fuel solenoid isn’t getting juice, relays aren’t picking up their end of the work.
Well here it goes again check your grounds, see attached photos from some preventative maintenance I was doing while swapping passengers side glows, since I had the inner fender off; and one of the main grounds was fully accessible, as an experiment I thought I’d check what my resistance from block to frame was, 300 ohm WOW, with only 14” of GND strap to the frame that is way too high. I had been having intermittent glow issues, but also knew I had at least 1 maybe more bad glow plug on passenger side.
Modern computer controlled engines literally live or die for want of good electron flow, every circuit relies on good solid & clean grounds. Sensors with resistive feedback are impacted by poor grounds, charging & starting circuits, lighting, glow plugs etc. need good grounding. Cleaner the better, poor grounding causes premature device fails as the circuit heats up as it tries to see paths of least resistance. In attached photos cleaning up main grounds resistance frame to block was reduced from 300 ohm to 0 ohm. I don’t have glow problems any more & found only 1 bad glow out of the 8 so maybe 2 things going on in the glow circuit.
Also take notice of fraying of the strap left unattended/un-inspected, that strap sometimes breaks in half and because it is hidden under the turbo/starter sometimes hard to notice until doing maintenance in that area.
So step one in any problem if you haven’t checked them in a while is take a look at the grounds, all of them.
Grounds, Grounds, Grounds
“All I ever hear here is check my grounds”
Are you having white smoke on startup, slow cranking, errant voltage to lift pump, dim headlights, IP sometimes acts like the fuel solenoid isn’t getting juice, relays aren’t picking up their end of the work.
Well here it goes again check your grounds, see attached photos from some preventative maintenance I was doing while swapping passengers side glows, since I had the inner fender off; and one of the main grounds was fully accessible, as an experiment I thought I’d check what my resistance from block to frame was, 300 ohm WOW, with only 14” of GND strap to the frame that is way too high. I had been having intermittent glow issues, but also knew I had at least 1 maybe more bad glow plug on passenger side.
Modern computer controlled engines literally live or die for want of good electron flow, every circuit relies on good solid & clean grounds. Sensors with resistive feedback are impacted by poor grounds, charging & starting circuits, lighting, glow plugs etc. need good grounding. Cleaner the better, poor grounding causes premature device fails as the circuit heats up as it tries to see paths of least resistance. In attached photos cleaning up main grounds resistance frame to block was reduced from 300 ohm to 0 ohm. I don’t have glow problems any more & found only 1 bad glow out of the 8 so maybe 2 things going on in the glow circuit.
Also take notice of fraying of the strap left unattended/un-inspected, that strap sometimes breaks in half and because it is hidden under the turbo/starter sometimes hard to notice until doing maintenance in that area.
So step one in any problem if you haven’t checked them in a while is take a look at the grounds, all of them.
