1996 International 4900 DT466E - No Start - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 9 (permalink) Old 04-18-2016, 06:05 AM Thread Starter
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1996 International 4900 DT466E - No Start

I changed the fuel filter and cleaned out the sediment screen on my 1996 International 4900 with the DT466E engine. I used the schrader valve on the filter housing and the primer button to bleed the air out of the fuel system until I was getting straight fuel. The truck doesn't start now. I disconnected the fuel return line at the back of the fuel rail assembly and I'm getting fuel coming out whenever I prime or try and turn the truck over. If I spray it with ether, it will run for about 2 seconds and then die, so there's obviously a fuel delivery problem here, but I can't figure out what the issue is. The only code I'm getting from the diagnostic button is 111, which just means ECM OK. What else could I be missing here? Thanks in advance.

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post #2 of 9 (permalink) Old 04-19-2016, 10:09 AM
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Don't these have a fuel shutoff solenoid?
The wire could have been knocked loose.
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post #3 of 9 (permalink) Old 04-19-2016, 02:52 PM Thread Starter
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I'm pretty sure it's getting fuel. When I disconnect the return line that goes back to the tanks, there's plenty of fuel flowing out when I attempt to turn the truck over or push the prime.

Since it fires with ether and runs for a couple seconds, it's led me to believe the injectors aren't firing, but I could be wrong... I just don't know what that would have to do with changing the fuel filter or cleaning out the catch screen.

The oil is pretty old and nasty, so I figured maybe the pressure is too low and the injectors aren't firing, even though the gauge on the dash reads 50 psi while I'm trying to crank it??? Anyway, I drained the oil last night and I'm going to put new oil in today... I figured it couldn't hurt anything, and it needed done anyway.

We'll see... I'm open to any other suggestions or ideas, because this has been puzzling me for a couple days now.

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post #4 of 9 (permalink) Old 04-20-2016, 04:17 AM
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Have a look at this thread https://www.thedieselgarage.com/forum...eshooting.html

I think it pretty much covers it

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post #5 of 9 (permalink) Old 04-20-2016, 04:59 AM Thread Starter
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Okay. Thanks. I'll look that over.

Last edited by deeplist; 04-20-2016 at 05:04 AM.
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post #6 of 9 (permalink) Old 04-20-2016, 07:29 PM
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When you hand prime,does the primer pump get harder to push? Also after hand priming leave the truck sit for about 5min,recheck primer,if no resistance your losing pressure.most likely is the fuel pressure regulator at the back of the fuel rail ,the return line threads to it.as in longhoods post I think you need between 35-50 psi in fuel rail. Bob
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post #7 of 9 (permalink) Old 04-20-2016, 07:39 PM Thread Starter
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Quote:
Originally Posted by burkeftm View Post
When you hand prime,does the primer pump get harder to push? Also after hand priming leave the truck sit for about 5min,recheck primer,if no resistance your losing pressure.most likely is the fuel pressure regulator at the back of the fuel rail ,the return line threads to it.as in longhoods post I think you need between 35-50 psi in fuel rail. Bob
Yes, the primer gets harder to push. 5 Minutes later, it's still firm. It doesn't loose pressure unless it's hours later, or overnight.

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post #8 of 9 (permalink) Old 06-09-2016, 03:16 AM Thread Starter
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I just figured I'd report back here with my findings in case anybody else stumbles upon this thread while searching for an answer to a similar situation.

Ultimately, this ended up being the CPS (cam position sensor) and once I put a new one in, the truck started right up without issue and has been running great since. Moral of the story: I'm going to keep an extra CPS in my toolbox in case it goes out on me again, and I'm 300 miles away from home. It seems to be a common part to fail.

Thanks to everybody for their help and insight.

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post #9 of 9 (permalink) Old 06-09-2016, 08:24 PM
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On your first post ,you reported that your code was 111 , a failed cam sensor should have set a 143,144,or 145 flash out code. I think what was throwing everyone off was that this happened right after filter change.when you started to flash out the codes did it flash 1,1 2, 1,1 2. 1, 1 2. Then the 111? It has been a while since I had one of these in the shop but if I remember correctly it first flashes active codes then three quick flashes then it will flash inactive.or maybe inactive then active. Well anyway I'm glad you have it repaired,and it is always good tho carry spare cam sensor with you. Bob
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