Cummins N-14 Celect Plus motor

Mar 09, 2015 at 07:12 PM CST + 1
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. Any old school mechanics out here that can help us with a problem on a Cummins N-14 525 celect plus motor ?? The motor will crank over and over but will not start and run at all changed fuel filter and all the normal things its like it has no compression at all tried using starting fluid and wont even run on that at all let alone start any ideas as my brother and i want to sell the truck its in a 2000 Freightliner Century appreciate any info

Replied on Mon, Mar 09, 2015 at 07:34 PM CST - 1
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. Could be ECM did it all at once just stop starting or not start after you changed filters. Are you getting fuel past filters

Replied on Mon, Mar 09, 2015 at 07:36 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. check the in line fuse coming from the battery.

Replied on Mon, Mar 09, 2015 at 07:57 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. Fuse at battery is good the motor just died and would not restart its getting fuel past the filters its like it just doesnt have any compression and squirt eather in the intake with the air filter out and it wont even try to start maybe jumped time on camshaft??

Replied on Mon, Mar 09, 2015 at 08:59 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. Sounds like a ECM. I had the same thing happen truck just died.

Replied on Mon, Mar 09, 2015 at 10:33 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. ECM sounds about right. Mine did the same thing,..new ecm fixed it

Replied on Tue, Mar 10, 2015 at 05:29 AM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. mine did the same thing but it was the fuel pump!!

Replied on Tue, Mar 10, 2015 at 08:46 AM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. Fuel shut off solenoid needs to be change

Replied on Tue, Mar 10, 2015 at 09:09 AM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. You can check the power and grounds to ecm if everything is correct there the ecm is bad. But it should start on starting fluid even if it is an ecm

Replied on Tue, Mar 10, 2015 at 11:58 AM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. check the throttle position sensors on the foot throttle we had an issue like this and that was part of the problem

Replied on Tue, Mar 10, 2015 at 02:54 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. It doesn't have any fire if it won't hit on either.

Replied on Wed, Mar 11, 2015 at 04:14 AM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. Sounds to me like the timing sensor that's located just above the oil pump on the back of timing gear cover. Mine did that once

Replied on Wed, Mar 11, 2015 at 01:29 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. How long has it been since it ran. You mentioned it doesn't seem to have any compression. I had a older cummins nt88 that sat for about 3 months. We had to pull it to get it started. The cylinders had died enough that the rings couldn't seal it. Fuel pressure should be 75 to start and 150 at idle. Eps will also cause the no start and will not set a code. Also check for constant power should be a three wire plug at the rear of the ecm above the starter area. Two are constant power fused at the battery box (check fuses) the other is ground.

Replied on Wed, Mar 11, 2015 at 01:29 PM CST

Posted by a private BulkLoads.com member.

How long has it been since it ran. You mentioned it doesn't seem to have any compression. I had a older cummins nt88 that sat for about 3 months. We had to pull it to get it started. The cylinders had died enough that the rings couldn't seal it. Fuel pressure should be 75 to start and 150 at idle. Eps will also cause the no start and will not set a code. Also check for constant power should be a three wire plug at the rear of the ecm above the starter area. Two are constant power fused at the battery box (check fuses) the other is ground.

Replied on Thu, Mar 12, 2015 at 03:39 PM CST + 1
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. The engine needs AIR, FUEL and Compression. If you can't get it to fire with either you need to look at compression. Rings stuck or Camshaft broken?

Replied on Sat, Mar 14, 2015 at 08:36 AM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. Had the same problem on my 99. Ended up eating 2 ecu's before the cummins dealer recomended I get an aftermarket control unit. Shortly after that the mains went. Again, Talked to cummins and they told me thats the normal course of action with those motors. Had a complete overhaul dun by a private mechanic as well as a new ecu and that truck runs better then new. I will find out what kind we put in the truck. Its in a 99 t-800 michigan special

Replied on Sat, Mar 14, 2015 at 08:36 AM CST

Posted by a private BulkLoads.com member.

Had the same problem on my 99. Ended up eating 2 ecu's before the cummins dealer recomended I get an aftermarket control unit. Shortly after that the mains went. Again, Talked to cummins and they told me thats the normal course of action with those motors. Had a complete overhaul dun by a private mechanic as well as a new ecu and that truck runs better then new. I will find out what kind we put in the truck. Its in a 99 t-800 michigan special

Replied on Sat, Mar 14, 2015 at 09:23 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. First off there should be no need for an "Aftermarket" Ecm. Second these days what ever works is the best plan of attack. If you want to know if your ECM is doing its thing plug it in....Turn key on.....Make sure that your check engine light icon comes on, this is to verify that the light works.....Next pull a sensor preferably something like the oil pressure sensor. This should turn on a check engine light if ECM is working. if you don't get a check engine light we need to test farther, but there is a good chance that your ECM is out or there is a wiring problem. Please feel free to call Ray Bong at Arizona Diesel Solutions...623-826-1256. He can help walk you through testing. He has an ad on the home page on this site. I'd be out of business without him. Especially with wiring and computer stuff. I also buy my Bullydog products from him. Tell him I sent you. I put a 3406 E in my 2005 w900 that came from factory with an ISX. He did the wiring harness conversion for me. Very neat, looks factory, even PACCAR techs can't tell, and everything works perfectly like factory. Art Pfluger

Replied on Sat, Mar 14, 2015 at 09:23 PM CST

Posted by a private BulkLoads.com member.

First off there should be no need for an "Aftermarket" Ecm.
Second these days what ever works is the best plan of attack.
If you want to know if your ECM is doing its thing plug it in....Turn key on.....Make sure that your check engine light icon comes on, this is to verify that the light works.....Next pull a sensor preferably something like the oil pressure sensor. This should turn on a check engine light if ECM is working. if you don't get a check engine light we need to test farther, but there is a good chance that your ECM is out or there is a wiring problem.
Please feel free to call Ray Bong at Arizona Diesel Solutions...623-826-1256. He can help walk you through testing. He has an ad on the home page on this site. I'd be out of business without him. Especially with wiring and computer stuff. I also buy my Bullydog products from him. Tell him I sent you.
I put a 3406 E in my 2005 w900 that came from factory with an ISX. He did the wiring harness conversion for me. Very neat, looks factory, even PACCAR techs can't tell, and everything works perfectly like factory.

Art Pfluger

Replied on Sun, Mar 15, 2015 at 09:42 AM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. unplug the oil sensor try to start it , left side center of engine block

Replied on Sun, Mar 15, 2015 at 09:48 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. I had the same issue- just like i reached down and turned the key off ---checked the ECM, the harness, fuses--- there is a two dollar stainless plate that goes in between the fuel shutoff solenoid and back of the pump. Could have saved a lot of money.....

Replied on Tue, Mar 17, 2015 at 04:03 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. The best way to check if it's your ecm is to call around to a cummins shop and see if they have an ecm for it. Usually they'll have a "test" ecm that they can hang on there. if it doesn't duplicate your problem with the test ecm, you've found your problem.

Replied on Tue, Mar 17, 2015 at 08:27 PM CST + 1
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. Quote: "The engine needs AIR, FUEL and Compression. If you can't get it to fire with either you need to look at compression. Rings stuck or Camshaft broken?" I am not a mechanic, but did go to school for that. This guy is right on! The ECM, sensors, fuel solenoid, pump, none of that matters. If the motor turns over and will not fire on either you have very low compression, wore out motor or stuck rings, or the cam is not turning so the motor is not breathing. Any diesel engine should fire on either without a ECM, oil pressure, or timing sensor if it makes compression resulting I heat to ignite the either. Good luck

Replied on Tue, Mar 17, 2015 at 08:27 PM CST

+ 1

Posted by a private BulkLoads.com member.

Quote: "The engine needs AIR, FUEL and Compression. If you can't get it to fire with either you need to look at compression. Rings stuck or Camshaft broken?"

I am not a mechanic, but did go to school for that. This guy is right on! The ECM, sensors, fuel solenoid, pump, none of that matters. If the motor turns over and will not fire on either you have very low compression, wore out motor or stuck rings, or the cam is not turning so the motor is not breathing. Any diesel engine should fire on either without a ECM, oil pressure, or timing sensor if it makes compression resulting I heat to ignite the either.

Good luck

Replied on Wed, Mar 18, 2015 at 08:25 AM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. had a problem like that once, if you have checked your fuel system and that checks fine, your ecm may not be sensing the crank or cam sensor therefore either having bad sensors or wires going to the ecm which will not let the engine start.

Replied on Wed, Mar 18, 2015 at 05:44 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. STOP STOP STOP STOP. READ THE POSTERS FIRST POST. The engine will not run on ether. This eliminates any fuel or electrical ecm related issues. As a few others stated it likely doesn't have compression, as cam breakage is very rare. You might slowly pour some atf into the intake manifold while someone cranks the engine. I think this would seal the cylinders enough to make it fire and run.

Replied on Wed, Mar 18, 2015 at 05:44 PM CST

Posted by a private BulkLoads.com member.

STOP STOP STOP STOP. READ THE POSTERS FIRST POST.
The engine will not run on ether. This eliminates any fuel or electrical ecm related issues. As a few others stated it likely doesn't have compression, as cam breakage is very rare.
You might slowly pour some atf into the intake manifold while someone cranks the engine. I think this would seal the cylinders enough to make it fire and run.

Replied on Thu, Mar 19, 2015 at 09:56 AM CST - 1
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. Mine dies when it is running when my water level in reservoir is to low and sets sensor off to protect motor. Sometimes it will restart and run for 30 seconds or so then die again. If it's really low it will not fire at all, either or anything. 2 gallons of water and fires right up.

Replied on Thu, Mar 19, 2015 at 11:32 AM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. You could try pulling off one head cover and cranking it while you watch to see if the valve train is moving. You could have something broken in the cam drive.

Replied on Thu, Mar 19, 2015 at 09:16 PM CST
Posted by a private BulkLoads.com member.	Posted by a private BulkLoads.com member. How bout an update from the guy with the engine problem? What did you try, what worked, are you still working on it? Did you just set it on fire and walk away?