heip 8v92 ddec2

Busted Knuckle · December 01, 2011, 08:50:31 PM

Quote from: Ace on December 01, 2011, 07:59:12 PM
After they installed two new 8D batteries the voltage appeared to stay more consistent in the mid 12v range fwiw

Ace I understand what yer saying, but if they truly want to rule it out my suggestion is the easiest way.
And anytime I have a PIA problem like this I like to rule out as many possibilities as possible!

BK

rv_safetyman · December 02, 2011, 04:58:37 AM

BK, the part that is mounted to the head in the return line is a "restrictive orifice". According to my manual it is an 0.080 orifice. I can't imagine why it would have to be changed. On an Eagle there is not a check valve in the return line - only on the supply line to keep the fuel from being siphoned out of the filters back into the tank.

Jim, I recall reading somewhere that some MCI buses have what is called a "lift pump". I picture it as an electric pump that is located close to the tank to overcome the "head" caused by the elevation that the fuel has to be lifted to get up and over some path before it gets to the first filter. You might want to check your manual to see if you have such a pump. If so, that would be the first place I would check.

Jim

Busted Knuckle · December 02, 2011, 05:40:17 AM

Quote from: rv_safetyman on December 02, 2011, 04:58:37 AM
BK, the part that is mounted to the head in the return line is a "restrictive orifice". According to my manual it is an 0.080 orifice. I can't imagine why it would have to be changed. On an Eagle there is not a check valve in the return line - only on the supply line to keep the fuel from being siphoned out of the filters back into the tank.
Jim

Jim just throwing ideas out there! I didn't know if the 8V's had them or not. But I know that on our 60 series it was bad and creating a similar situation. Once changed no mo problem.

BK

luvrbus · December 02, 2011, 05:44:43 AM

Ace will your Pro/Link read the version of software his ECM has ?

good luck

Ace · December 02, 2011, 05:58:46 AM

Clifford I'm not sure, why?

luvrbus · December 02, 2011, 06:34:18 AM

I was talking with Cole about it not giving any codes on shut down and he was telling me version 151 which he should have with a rebuild from DD if harness wasn't up dated from a 121 version it won't give codes on shutdown.

These thing are complicated with codes ,sub codes ,harnesses ,versions of software and etc lol I found out the Pro/Link and DDDL will only read the primary codes takes the DD software to read and delete the sub codes

good luck

Hard Headed Ken · December 02, 2011, 08:10:32 AM

I've use a test light, volt meter, LED and resistor, scope or what ever I had at the time to comfirm if the injector was receiving the signal to fire. I've done this many times on fuel injected gasoline engines. I've never needed to use this method on a DDEC, but I think it would work. That way you at least you know if the injectors were receiving the electrical signal to fire. If they are firing after the engine dies then it a fuel supply problem, if not it's an electrical problem.

Ken

jimsflx · December 02, 2011, 09:38:05 AM

up date bk we changed the backflo valves,on both lines and changed the fuel lines on the engine,going from first filter to pump, then to second filter and on to the engine,still stopped. so back to electical.thanks jim

luvrbus · December 02, 2011, 10:01:35 AM

So easy to take the ECM into a DD dealer and have it read you will go broke chasing problems lol just because you tired another ECM doesn't mean much if you have a bad timing sensor.
DD can dig deep into a ECM with their software

good luck

robertglines1 · December 02, 2011, 10:25:34 AM

real dumb!! put & keep a cold wet towel on it see if it (ddec) still shuts down. Could just be overheating and shutting down.. cool down a few degrees and restart. Just like any other computer. reaching here---but simple.

Flatspot · December 02, 2011, 03:54:13 PM

Just out of curiosity there has been no discussion about an engine idle shutdown. DDECII has the option for the engine to be shutdown to avoid extended idle.
Is the idle shutdown enabled?

luvrbus · December 02, 2011, 04:18:37 PM

I asked Larry but never got a reply back ? will the fast idle engage on a DDEC 11 if the idle shut down feature is enabled

good luck

Flatspot · December 02, 2011, 06:26:57 PM

Clifford,
I should have known that you would have ask, I missed it.
On the fleet that I worked with, yes but that said there was a way the ECM looked for a input on the power control wiring or brake input signal... I just can't recall specifics other than there were a lot of firmware changes made by Detroit because the drivers had too much time to figure ways around the way the engineers enabled things.
For instance initially they would set the trailer brake to hold the rig and the tractor could idle indefinitely (PTO time in the log) time for a firmware change.
We had a company owner/CEO that wanted a fleet average of 7+mpg and idle time killed the average.
I guess this is a qualified 'yes' depending on the firmware rev of the EEPROM.
Disabling the idle shutdown feature would be a simple fix if that is the reason this engine is shutting down. I wonder if it shuts down while driving?

Larry

Ace · December 03, 2011, 01:18:35 AM

Yes it shut down twice while driving it home a short distance!

The idle shutdown was previously mentioned and checked and was determined to not be the problem. There wasn't a way (at least for me) to turn it on or off via the pro-link although it was listed in the parameters.

jimsflx · December 05, 2011, 03:40:59 PM

update, took ecm to detroit diesel, no new codes, idel shut down is turn off. they said every thing fine,does anyone know how to turn the hours on the motor to miles? put another restricker in the return fuel line. fired up motor shut down in 10 minutes. thanks jim