Intermittent Shutdown Problems

[DixieDirt]

Hi all. I finally got my truck running and driving a few weeks ago with the help of everyone here but I have developed another problem. The truck will literally shut off every once and a while, even when driving. Plus it won’t idle for more than 10 or 20 minutes. It just shuts off. Though the ignition is still hot and all the electrical components continue to work. The first few times it happened, when I tried to restart it, the WTS light never came on and it wouldn’t start until I messed with the relays under the hood. Now, the WTS light comes on when it should and it restarts just fine. I’m just worried about the truck dieing somewhere out in the hills and not being able to restart it by myself. The truck itself has not set a check engine light but I still plan on snatching my buddy’s snap on scan tool to run whatever codes that may be present. In the mean time where should I start? Is it possible that my CPS is going bad? Any help you guy’s can provide would be greatly appreciated.

[stump0331]

bump!!!!!!!!!!!!!

[SCUFFY828]

does sound liem its possible to be cps

[DixieDirt]

update. i started the truck this morning and it didnt idle for more than 5 and minutes before it died. went to restart it and once again no glow plug light and it wouldnt start. just cranks.

[Ditty]

Is the Tach moving? Sounds like the CPS to me.

[SCUFFY828]

im beginning to think its possible to have a fuel heater shorting out , any time you dont have a wait to start light , the pcm has no power , unplug the fuel heater and try again

[DixieDirt]

where is the fuel heater located in my engine compartment? also what does it look like. one more thing on a side note, once again i went outside to start the truck and the WTS light took almost 30 seconds to come on with out me messing with any engine wiring or realys, but it did come on, on its own this time, just took a while.

[SCUFFY828]

Originally Posted by DixieDirt

where is the fuel heater located in my engine compartment? also what does it look like. one more thing on a side note, once again i went outside to start the truck and the WTS light took almost 30 seconds to come on with out me messing with any engine wiring or realys, but it did come on, on its own this time, just took a while.

the fuel heater is located inside the fuel filter housing , the wire going to it is on the drivers side ,there are two wires going into the side , unplug both of them , like i said before the wait to start light is controlled by the pcm, if its not coming on the pcm isnt getting power , the fuel heater is on the same circuit and gives problems

[DixieDirt]

again i fired the truck up this morning, and it ran fine for about 5 minutes then died. Now the truck wont start back up. I un pluged both connectors on the driver side fuel filter housing in hopes of restarting it but no luck. one looked like it just slipped over a small post and the other was slightly above the post and was kind of a square looking connector. Now what do i do?

[DixieDirt]

well whatever the problem is, i can tell you all for sure its ecm related. I swaped ecm's with one i keep as a spare and it fired right up, no problems what so ever. glow plugs came on for the right amount of time and started fine. ran kinda crappy but i think thats because the ecm codes are diffrent. swaped back to the old one and the truck wouldnt start and the glow plugs wouldnt energize.