LOST JEEPS
http://www.lostjeeps.com/forum/phpBB3/

Sierra Road trip, a few "no starts" and some codes
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=80408		 Page 1 of 2
Author:  SFHLibertyCRD [ Tue Oct 14, 2014 8:04 pm ]
Post subject:  Sierra Road trip, a few "no starts" and some codes
Hi everyone, need some troubleshooting help:

Family road trip (700+ miles roundtrip) to the Eastern Sierras, loaded up with 4 adults, a baby, 2 dogs and a roof box. We were maxed out and much fun was had by all, but we had a few good scares with no start situations (crank but no fire) in inconvenient places:

1) First time it happened was up around 9k feet near South Lake, after about 4 hours of driving (hot engine). With the help of a few guys in the parking lot, we tested for the usual suspects, bled the fuel lines, etc. Still no start. After about 30 minutes of looking things over and trying, one of the guys wondered if anyone had a code reader, and I remembered my handy little dongle and app and pulled this code: P0725 (I had forgotten that I also had my GDE flash tool/reader in the trunk, which comes in handy later). Cleared it and it started right up.

2) Second time is fuzzy in my memory, but it was after coming down the above hill in a parking lot on the same day. I can't remember if I pulled a code or not, but clearing all codes allowed me to start again.

3) Third time was also on a hot engine out a few miles on some dirt trails on BLM land. This time, my DashCommand iPhone app didn't pull any codes. I went ahead and cleared codes anyway, then it started right up.

4) The last time was in the driveway at home a few minutes after arriving, again on a hot engine after hours of driving. I tried to start the car a few minutes later, no go. Again, no codes on my iPhone app and this time clearing the codes wasn't doing anything. In frustration, I pushed the car out of the way and let it sit for a while. Maybe 30 minutes later I remembered I had the GDE tool, so I scanned and pulled these codes: P0335 P0513. Unfortunately, I did not try to start it before clearing the codes, so I don't know if it would have started, but I cleared the two codes and started right up on the first try.

My usual short commute twice a week is only 5 miles each way, so I had not seen this issue before and maybe that is related to engine rarely getting up to temp on those trips (a shame, I know).

From reading up a little, I know P0725 Engine Speed Input Circuit-Trans Speed Sensor and P0335 both point to a potentially bad crankshaft position sensor (?): viewtopic.php?f=5&t=79631
viewtopic.php?f=5&t=79028

[I don't know why I would get P0513 related to the SKIM system, but I'm willing to leave that alone for now as it seems secondary or not important for the time being unless it reoccurs.]

Does anyone else have any other ideas about where I should start, or does the crankshaft position sensor sound like the right place to start?
Author:  RockyMountainYote [ Tue Oct 14, 2014 9:17 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
I'd put a crank sensor on it for sure. Having your Jeep act up after a good heat soak is a sign of a failing crank sensor. Good luck
Author:  Mike92104 [ Wed Oct 15, 2014 1:31 am ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
I would also start with a crank sensor.
Author:  SFHLibertyCRD [ Wed Oct 15, 2014 3:38 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
Thanks guys. Mike, noticed your in San Diego. Do you work on the CRD yourself or know of any good mechanics?
Author:  papaindigo [ Wed Oct 15, 2014 3:58 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
Crank position sensor is likely the culprit and it's not expensive; see viewtopic.php?f=5&t=80284&p=845664#p845664 for a how to remove and test. Basic wrenches and screwdrivers plus if you want to test it a heat source (hair dryer) and volt/ohm meter are all you need to DIY.
Author:  SFHLibertyCRD [ Wed Oct 15, 2014 5:01 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
papaindigo wrote:
Crank position sensor is likely the culprit and it's not expensive; see viewtopic.php?f=5&t=80284&p=845664#p845664 for a how to remove and test. Basic wrenches and screwdrivers plus if you want to test it a heat source (hair dryer) and volt/ohm meter are all you need to DIY.


Thanks, papaindigo. I was planning on doing this myself. Those are helpful instructions. Not sure if I should just order the part so that I can get it on while I'm in there, or test it first. It's only ~$60, so might just buy to have on hand.
Author:  papaindigo [ Wed Oct 15, 2014 5:07 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
Crank position sensor is 5066882AA or Bosch 0281002434 also apparently Standard Motor Products PC766 or Airtex 5S7000
Author:  Mike92104 [ Wed Oct 15, 2014 5:12 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
SFHLibertyCRD wrote:
Thanks guys. Mike, noticed your in San Diego. Do you work on the CRD yourself or know of any good mechanics?


I do the work myself. I did ask Rancho Jeep here in SD if they had the tools, and they said yes that they do get one in from time to time.
Author:  SFHLibertyCRD [ Wed Oct 15, 2014 5:14 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
papaindigo wrote:
Crank position sensor is 5066882AA or Bosch 0281002434 also apparently Standard Motor Products PC766 or Airtex 5S7000


Thanks. Any idea which of these is most reliable? I found the Airtex for only $45. Given that the OEM one has failed already, I'm inclined to try something else.
Author:  papaindigo [ Thu Oct 16, 2014 8:55 am ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
No clue on reliability
Author:  Mike92104 [ Thu Oct 16, 2014 4:59 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
I've had a lot of luck with Bosch products.
Author:  SFHLibertyCRD [ Thu Oct 16, 2014 5:26 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
Mike92104 wrote:
I've had a lot of luck with Bosch products.


I couldn't find the Bosch version at any online retailers with the listed part number. If anyone has an updated one, please let me know.
Author:  Mike92104 [ Thu Oct 16, 2014 5:53 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
SFHLibertyCRD wrote:
Mike92104 wrote:
I've had a lot of luck with Bosch products.


I couldn't find the Bosch version at any online retailers with the listed part number. If anyone has an updated one, please let me know.

I noticed O'reilly has BWD (Borg Warner Development) which is also a quality company.
Author:  SFHLibertyCRD [ Thu Oct 16, 2014 6:16 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
Anyone heard of this brand? Duralast. It's $20-$30 cheaper, but not worth it if its no good. If not, I'll go for the BWD. With coupons and such I can bring it down to about $70.

http://www.autozone.com/autozone/parts/ ... _726118_0_
Author:  SBrooks [ Thu Oct 16, 2014 6:54 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
What success (or lack thereof) has anybody had with the brand that ID Parts sells?

Steve
Author:  SFHLibertyCRD [ Thu Oct 16, 2014 7:16 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
SBrooks wrote:
What success (or lack thereof) has anybody had with the brand that ID Parts sells?

Steve


They sell the same one that is presumably failing, OEM Mopar: http://idparts.com/catalog/product_info ... ts_id=4484.

So unless Mopar has gone to a different supplier or improved the design, performance will probably be similar.
Author:  Mike92104 [ Thu Oct 16, 2014 7:37 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
SFHLibertyCRD wrote:
Anyone heard of this brand? Duralast. It's $20-$30 cheaper, but not worth it if its no good. If not, I'll go for the BWD. With coupons and such I can bring it down to about $70.

http://www.autozone.com/autozone/parts/ ... _726118_0_


I try to avoid the Duralast crap.
Author:  SFHLibertyCRD [ Thu Oct 16, 2014 7:41 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
Mike92104 wrote:
SFHLibertyCRD wrote:
Anyone heard of this brand? Duralast. It's $20-$30 cheaper, but not worth it if its no good. If not, I'll go for the BWD. With coupons and such I can bring it down to about $70.

http://www.autozone.com/autozone/parts/ ... _726118_0_


I try to avoid the Duralast crap.


Good to know. BWD it is. Thanks for all the feedback.
Author:  SFHLibertyCRD [ Sun Oct 19, 2014 12:59 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
Does a bad CPS sensor impact fuel efficiency at all?
Author:  WWDiesel [ Sun Oct 19, 2014 2:13 pm ]
Post subject:  Re: Sierra Road trip, a few "no starts" and some codes
SFHLibertyCRD wrote:
Does a bad CPS sensor impact fuel efficiency at all?

Only if the engine is not running! :ROTFL: :ROTFL:
Seriously, I would say no, it only provides a speed input signal to the OBC. If the OBC does not receive this signal, it shuts the engine off by shutting down fuel injection.... :wink:

RockAuto shows all three brands listed with the best prices! No luck on the Bosch one in the US, only found it in England and price is 75+
STANDARD MOTOR PRODUCTS Part # PC766 More Info {#5066882AA}
Category: Crankshaft Position Sensor

AIRTEX / WELLS Part # 5S7000 More Info {#5066882AA, SU8492}
Category: Crankshaft Position Sensor

MOPAR Part # 5066882AA
Category: Crankshaft Position Sensor
Page 1 of 2 All times are UTC - 5 hours [ DST ]
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
http://www.phpbb.com/