99 Cummins won't start?? Even with starting fluid
I've got a 99 and can't get the thing to run. Bought it for 500 bucks because the guy had no knowledge for diesels. It had ran when he parked it and it sat for a few years then wouldn't run. I figured for sure it was the injection pump because it threw several codes for it. I tried to get it to fire on starting fluid but it wouldn't. Tried several times and nothing, not even a sputter. So then it had me thinking maybe the guy melted pistons in the thing. Took the head off and the pistons look like new!! Very little wear in the cylinders, good crosshatch, no scrapes, nothing!! Head gasket seemed good, no coolant in oil or anything. didnt appear to be any blowby coming out the oil cap or breather when cranking. So what's going on here? Just a bad can of ether or what?? I was just trying to get the thing to fire for sure before I go buying an injection pump!
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Would've been better to do a compression test first. Could have stuck rings and making no compression
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Valves moving? Spun cam gear? Broke cam?
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Valves all move! I did not check the timing though, is it possible that that can gear could have spun? I've never heard of that happening |
Does it sound "normal" when cranking? In other words does it sound like it has compression when you crank it or does it sound like it freewheels? If it sounds like it has compression and the either is actually getting into the cylinders then it should at least bang a couple of times. Maybe a rodent got into it and built a nest in the intake tube or something and it's blocking intake air. Spray the either directly into the intake elbow and see what happens.
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Definitely that potential. I know of one walking from a dumby playing with his lockup switch while sitting idle.
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Now would I be able to check that by setting the engine as if I'm doing a valve adjustment? Like set #1 or 6 tdcc and check that Everything is where it should be?
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You would check it by pulling the front cover.
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If the crank/cam timing was out much, pistons and valves would be crashing together, and if it was off just a little bit it would still run.
Compression/rings are most likely just fine if the cylinder walls look as good as described. I'd say you have a fuel problem. |
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Dealt with this on a real head stumper, took 4 days and 3 cheap lift pumps burning up before I convinced the guy to buy a quality lift pump. Wouldn't even give so much as a cough with ether either. Threw a DDRP on it and it fired right up after priming everything. Fuel system was just plumb bone dry, guess the ether alone wasn't enough to get it to fire.
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I bet if you go get some John deere ether she will come to life.
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I will try the leak down test, it has a fass on it, pumps good fuel
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Best dam ether on the planet. My father had a 7.3idi ford that had the infamous air in fuel issues. Started extremely hard. It would not fire on ether. Ever. A windex bottle full of diesel fuel sprayed in the intake and it would fire right off. No idea what the science is behind that but theres some food for thought as well. |
You really need to know HOW to use ether, too. Have you had the proper training?
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Step 2: Impatiently try starter multiple times over the next 30 seconds. Step 3: Spray slightly less ether than was used in step 1. |
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When it puffs white out of the plenum, you've found the sweet spot. Sent from my iPhone using Tapatalk |
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