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| Quit running not starting http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=85741 |
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| Author: | LMWatBullRun [ Sat Dec 10, 2016 3:08 pm ] |
| Post subject: | Quit running not starting |
It is not a fuel problem. What electronic sensor issues would cause it to quit and not restart? |
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| Author: | WWDiesel [ Sat Dec 10, 2016 3:15 pm ] |
| Post subject: | Re: Quit running not starting |
LMWatBullRun wrote: It is not a fuel problem. What electronic sensor issues would cause it to quit and not restart? No. 1 is CPS, crank position sensor! Notorious for failing during engine heat up cycle or even after engine is at normal operating temperature and does not always set a DTC (check engine light) Cam sensor can also be problematic... 
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| Author: | rankom [ Sat Dec 10, 2016 3:22 pm ] |
| Post subject: | Re: Quit running not starting |
ok what is the fuel pressure reading? low side and high pressure (rail side) ? did you cap injectors one at a time to see if you had low pressure , ?CEL any codes? |
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| Author: | papaindigo [ Sat Dec 10, 2016 4:17 pm ] |
| Post subject: | Re: Quit running not starting |
Need a bit more information. For example does the engine turn over when you engage the starter? If so and it's not fuel and there is no CEL then yes the crank position sensor would be suspect. If it does not turn over then you need to look at battery or key switch/rod as the engine starts if the key switch rod running under the steering column turns the ignition switch but only if the ECU is "happy" with battery power enough to engage starter and tell the engine to start. |
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| Author: | rankom [ Sat Dec 10, 2016 6:34 pm ] |
| Post subject: | Re: Quit running not starting |
LMWatBullRun wrote: It is not a fuel problem. What electronic sensor issues would cause it to quit and not restart? ops i just realized you are one of the veteran CRD guys , so just ignore my suggestions about fuel pressure loss , yes crank sensor , my bad |
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| Author: | LMWatBullRun [ Sat Dec 10, 2016 8:42 pm ] |
| Post subject: | Re: Quit running not starting |
papaindigo wrote: Need a bit more information. For example does the engine turn over when you engage the starter? If so and it's not fuel and there is no CEL then yes the crank position sensor would be suspect. If it does not turn over then you need to look at battery or key switch/rod as the engine starts if the key switch rod running under the steering column turns the ignition switch but only if the ECU is "happy" with battery power enough to engage starter and tell the engine to start. Turns over, but will not start. Where is the crank sensor? Thanks, fellas |
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| Author: | papaindigo [ Sat Dec 10, 2016 9:18 pm ] |
| Post subject: | Re: Quit running not starting |
See pics at viewtopic.php?f=98&t=74594 . It's at back of engine just in front of transmission bell housing and behind some heat shields. Image 9 is a close in view. Test is to pull it off; hook up OHM meter; apply heat from like hair dryer; if resistance goes nuts it's bad. |
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| Author: | LMWatBullRun [ Mon Dec 12, 2016 10:33 am ] |
| Post subject: | Re: Quit running not starting |
papaindigo wrote: See pics at viewtopic.php?f=98&t=74594 . It's at back of engine just in front of transmission bell housing and behind some heat shields. Image 9 is a close in view. Test is to pull it off; hook up OHM meter; apply heat from like hair dryer; if resistance goes nuts it's bad. Got it, PapaIndigo! As compared to some things on the CRD, this does not look too hard to get at, a minor PITA but not like doing the timing belt. I knew it was at the back of the motor, but could not remember which side. Great pictures, btw. Have both the cam and crank sensors coming. We shall see. |
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| Author: | LMWatBullRun [ Fri Dec 23, 2016 12:41 pm ] |
| Post subject: | Re: Quit running not starting |
OOOOooohkay. Well, not really  FYI- New fuel filter installed before I asked the question in the first place, seems like good fuel flow. Replaced the cam position sensor and the crank position sensor, and still no go. Cranks fine, good voltage (Die Hard platinum) but not a hint of starting. Any other thoughts? Anybody? |
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| Author: | rankom [ Fri Dec 23, 2016 1:04 pm ] |
| Post subject: | Re: Quit running not starting |
rankom wrote: ok what is the fuel pressure reading? low side and high pressure (rail side) ? did you cap injectors one at a time to see if you had low pressure , ?CEL any codes? check fuel pressure again (FUEL RAIL ) HIGH PRESSURE SIDE |
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| Author: | flash7210 [ Fri Dec 23, 2016 1:34 pm ] |
| Post subject: | Re: Quit running not starting |
LMWatBullRun wrote: OOOOooohkay. Well, not really FYI- New fuel filter installed before I asked the question in the first place, seems like good fuel flow. Replaced the cam position sensor and the crank position sensor, and still no go. Cranks fine, good voltage (Die Hard platinum) but not a hint of starting. Any other thoughts? Anybody? What are the symptoms again? Engine cranks but wont start? Any codes? Check ASD fuse. Check ASD relay. Verify that there is no air in fuel. Verify fuel supply to CP3. |
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| Author: | LMWatBullRun [ Fri Dec 23, 2016 2:07 pm ] |
| Post subject: | Re: Quit running not starting |
rankom wrote: rankom wrote: ok what is the fuel pressure reading? low side and high pressure (rail side) ? did you cap injectors one at a time to see if you had low pressure , ?CEL any codes? check fuel pressure again (FUEL RAIL ) HIGH PRESSURE SIDE Have no ability to get a fuel reading. |
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| Author: | LMWatBullRun [ Fri Dec 23, 2016 2:12 pm ] |
| Post subject: | Re: Quit running not starting |
flash7210 wrote: LMWatBullRun wrote: OOOOooohkay. Well, not really FYI- New fuel filter installed before I asked the question in the first place, seems like good fuel flow. Replaced the cam position sensor and the crank position sensor, and still no go. Cranks fine, good voltage (Die Hard platinum) but not a hint of starting. Any other thoughts? Anybody? What are the symptoms again? Engine cranks but wont start? Any codes? Check ASD fuse. Check ASD relay. Verify that there is no air in fuel. Verify fuel supply to CP3. Was running fine down the road, DW reported that it started to run rough and then quit after a few seconds. Was able to restart once, then nothing. Cranks fine. CEL light is lit but no code reader presently. Replaced fuel filter, even though fuel quantity was fine. No joy. Replaced Cam position sensor. No joy. Replaced Crank sensor. No joy. All fuses rechecked. Swapped ASD relay, no joy Primer pump is tight, and in-tank pump is running on initial turn of key- can hear it running for a few seconds. No air in fuel. Am considering replacing fuel rail sensor with spare unit. Other thoughts? |
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| Author: | ebbnflow [ Fri Dec 23, 2016 2:37 pm ] |
| Post subject: | Re: Quit running not starting |
Your best bet is to get a code reader and see what it says. |
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| Author: | flash7210 [ Fri Dec 23, 2016 5:07 pm ] |
| Post subject: | Re: Quit running not starting |
LMWatBullRun wrote: flash7210 wrote: LMWatBullRun wrote: OOOOooohkay. Well, not really FYI- New fuel filter installed before I asked the question in the first place, seems like good fuel flow. Replaced the cam position sensor and the crank position sensor, and still no go. Cranks fine, good voltage (Die Hard platinum) but not a hint of starting. Any other thoughts? Anybody? What are the symptoms again? Engine cranks but wont start? Any codes? Check ASD fuse. Check ASD relay. Verify that there is no air in fuel. Verify fuel supply to CP3. Was running fine down the road, DW reported that it started to run rough and then quit after a few seconds. Was able to restart once, then nothing. Cranks fine. CEL light is lit but no code reader presently. Replaced fuel filter, even though fuel quantity was fine. No joy. Replaced Cam position sensor. No joy. Replaced Crank sensor. No joy. All fuses rechecked. Swapped ASD relay, no joy Primer pump is tight, and in-tank pump is running on initial turn of key- can hear it running for a few seconds. No air in fuel. Am considering replacing fuel rail sensor with spare unit. Other thoughts? A bad fuel rail pressure sensor will not keep it from running. It will set a code and will still run but will be in limp mode. Another possibility is the fuel quantity solenoid on the CP3. You could try unplugging it and if it runs that may be your problem. You now need to verify that fuel is getting up to and pressurizing the rail. A bad fuel rail pressure solenoid will keep the rail from building pressure. |
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| Author: | rankom [ Fri Dec 23, 2016 5:14 pm ] |
| Post subject: | Re: Quit running not starting |
ok if you don't have diagnosing tool , don't replace parts ,and don't do guess work , we see that people replacing CP 3 pumps , rather then diagnose fuel pressure loss, again if you absolutely can get this tools , then pull glow plugs and check if any damaged then we can suggest pulling injectors ,, but i rather you get that code reader first, |
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| Author: | WWDiesel [ Fri Dec 23, 2016 7:34 pm ] |
| Post subject: | Re: Quit running not starting |
ebbnflow wrote: Your best bet is to get a code reader and see what it says. X2, always the first step!!! |
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| Author: | Mountainman [ Fri Dec 23, 2016 9:57 pm ] |
| Post subject: | Re: Quit running not starting |
X2 on the cp3 also, more than a couple of people have replaced good ones. If it does turn out to be one I'll ship you one for free for all of your ARP work |
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| Author: | racertracer [ Fri Dec 23, 2016 10:47 pm ] |
| Post subject: | Re: Quit running not starting |
Is there an inline fuel lift pump on this vehicle? |
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| Author: | WWDiesel [ Sat Dec 24, 2016 11:29 am ] |
| Post subject: | Re: Quit running not starting |
racertracer wrote: Is there an inline fuel lift pump on this vehicle? He posted this on a different thread:  LMWatBullRun wrote: Lift pump is what should have been installed at the factory. Mine has it, and it is highly recommended.
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