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Power loss after passing!
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=76989		 Page 1 of 1
Author:  Mykol [ Tue Oct 08, 2013 10:46 pm ]
Post subject:  Power loss after passing!
Just after hard accelerating at highway speeds like when passing another vehicle, my CRD loses power. It will barely maintain speed. I can shut off the key, restart, then all is fine. No mods. Any ideas?
Author:  sparks_vfr [ Wed Oct 09, 2013 2:47 am ]
Post subject:  Re: Power loss after passing!
Edit: Can you get the codes that are thrown, am guessing your CEL is on..

However..

MAP Sensor most likely... (But get the code to make sure)

Plenty on ebay that do the job at considerably less than the original..

http://www.ebay.co.uk/itm/150794704101? ... 1439.l2649

Am sure someone will be along to post a link to a US ebay supplier for same part or maybe an IDParts link..
Author:  Hexus [ Wed Oct 09, 2013 6:41 am ]
Post subject:  Re: Power loss after passing!
Check your intercooler hoses, also check the intake hose coming from the air box to the turbo.

Clean and/or replace your MAP sensor.
Author:  papaindigo [ Wed Oct 09, 2013 6:56 am ]
Post subject:  Re: Power loss after passing!
To check the intercooler/CAC hoses for leaks you have to remove them from the vehicle to fully inspect the bottom side. While it's likely unrelated to your issue while those hoses are off pull the air filter to turbo hose and check from a crack on the bottom just in front of the turbo (on reinstall be sure upper end touches MAF sensor before tightening clamp lest you crush the air filter box lid outlet). Also probably unrelated but while that hose is off check turbo impeller for play - very slight fore/aft ok barely perceptible side to side ok but anymore is cause for concern.

MAP sensor cleaning is covered in Sir Sam's NOOB guide. Replacement (not that eBay one) is old # 5140331AA new # 68031593AA - alternative Bosch 0 281 002 437 or a much cheaper and confirmed good alternative is BOSCH # is 0 281 002 845 or GM PN 55206797

Sounds like something is kicking you into "limp" mode so codes would be helpful.

PS. bleed your fuel filter head for air.
Author:  jeepdan [ Wed Oct 09, 2013 8:37 am ]
Post subject:  Re: Power loss after passing!
Yes, check for air.
Years ago, I had this problem a few times with the older version fuel filter assembly.
Had to pull to the side of the road and shut engine off and restart.
Author:  flash7210 [ Wed Oct 09, 2013 8:43 am ]
Post subject:  Re: Power loss after passing!
Check the fuel filter.
Might be a clogged filter or you have air in the filter head.
Author:  naturist [ Wed Oct 09, 2013 8:57 am ]
Post subject:  Re: Power loss after passing!
flash7210 wrote:
Check the fuel filter.
Might be a clogged filter or you have air in the filter head.



I agree, it sounds to me more like a marginal fuel filter. When the fuel filter becomes a problem, it will occur first during passing/hill climbing or other high fuel flow situations. As the filter gets more and more restricted, it'll take less and less throttle to cause limp mode. Given the cost of fuel filters, I'd change it. Cleaning the MAF is a good idea whenever, but I am not a fan of that answer for your particular symptoms.
Author:  dgeist [ Wed Oct 09, 2013 9:08 am ]
Post subject:  Re: Power loss after passing!
naturist wrote:
flash7210 wrote:
Check the fuel filter.
Might be a clogged filter or you have air in the filter head.



I agree, it sounds to me more like a marginal fuel filter. When the fuel filter becomes a problem, it will occur first during passing/hill climbing or other high fuel flow situations. As the filter gets more and more restricted, it'll take less and less throttle to cause limp mode. Given the cost of fuel filters, I'd change it. Cleaning the MAF is a good idea whenever, but I am not a fan of that answer for your particular symptoms.


X3, sounds like a fuel issue if you can punch it but just not sustain...like there's enough fuel in the line to get you there but the filter (or a leak allowing air in the filter/lines) is not backfilling the fuel in the supply chain.

Dan
Author:  Auberon [ Wed Oct 09, 2013 9:35 am ]
Post subject:  Re: Power loss after passing!
Fuel filter was my first thought also.

By any chance have you noted a hint of whitish smoke when you are at heavy throttle....I know that when passing there is a lot going on but it would be worth having a look.
Don't panic!...that can be confirmation of the fuel filter aspects that have been mentioned....when a diesel is below the ideal fuel mix at heavy throttle this can sometimes be noted.

It does read like fuel shortage especially as after shutdown and restart it clears.
Good luck.
Author:  geordi [ Wed Oct 09, 2013 12:16 pm ]
Post subject:  Re: Power loss after passing!
Think about this logically: Why would a low power condition clear just by a simple reboot if it was caused by lack of fuel?

The CRD does not have any factory lift pump, so if the filter is the restriction against the suction from the injection pump - why would it instantly clear after a reboot?

More likely: You are getting limp mode from a code. Probably an overboost code because when you punch it, the boost can easily spike above 20psi, which will trigger the code and limp mode. This is NOT a problem with the MAP sensor, it is doing its job. The problem is that Chrysler selected a turbo that is too small for the motor so that it would spool faster... But it operates too close to its upper limits normally.

I have never owned a vehicle where you can break things by simply flooring a stock vehicle, but this is it.
Author:  Auberon [ Sat Oct 12, 2013 1:19 am ]
Post subject:  Re: Power loss after passing!
[quote="Mykol"]Just after hard accelerating at highway speeds like when passing another vehicle, my CRD loses power. It will barely maintain speed. I can shut off the key, restart, then all is fine. No mods. Any ideas?[/quote]

Would not that over-boost situation discussed by Geordi especially if limp in mode was entered throw a CEL?

This would need - as a soft code, 5 warm-up cycles to switch the CEL off. Firstly it is likely a CEL would appear and that was not mentioned by the OP and it only takes a pause to rectify.
Not disagreeing about the turbo selection by definition it would throw a code show a CEL if it were to enter Limp in mode and thus my reasoning of 5 warm-up cycles to clear the CEL but there isn't one indicated.

The small air issue could clear from a shutdown - switch-on implying it just needs a burp.
More information is needed.
Author:  Big Montana [ Wed Oct 16, 2013 10:33 pm ]
Post subject:  Re: Power loss after passing!
jeepdan wrote:
Yes, check for air.
Years ago, I had this problem a few times with the older version fuel filter assembly.
Had to pull to the side of the road and shut engine off and restart.


X2. I had this problem and changed fuel filter out. It stopped.
Author:  Mykol [ Wed Oct 16, 2013 10:41 pm ]
Post subject:  Re: Power loss after passing!
My parts store had to order a wix filter and I picked it up tonight. Will do the install and report back. Just at 200k miles, replaced the upper and lower radiator hoses, thermostat, wp, TB,tensioners and serpentine belt. Hope the filter helps the power loss, but now my left stereo speakers are dead. Got to figure that out with input from others.

Thanks guys for your help!
Author:  halburchal [ Thu Oct 17, 2013 9:14 am ]
Post subject:  Re: Power loss after passing!
Its the fuel filter (99% positive). I've experienced replies that will tell you that you CRD is in bad shape when most of the time it is something small and DIY repairable. I think that they want you to dump the CRD so they can pick one up cheap.

Concentrate on the simplest solutions first. That's been my experience. And I own two of them.
Author:  Drewd [ Thu Oct 17, 2013 12:44 pm ]
Post subject:  Re: Power loss after passing!
Had same problem and fuel filter fixed it.
Author:  jeepdan [ Thu Oct 17, 2013 11:58 pm ]
Post subject:  Re: Power loss after passing!
Speaking of fuel filters, I just bought two Mopar brand fuel filters from my local dealer, to service my two CRDs.
The Mopar filters now have printed on them, "Made in China" :evil:
Author:  Auberon [ Fri Oct 18, 2013 8:01 am ]
Post subject:  Re: Power loss after passing!
These are some of the reasons I swapped (I guess in what could be considered a backwards step) to the Racor.
There are decent performance ratings available on the filtration parameters on these units (in terms of absolute and other performance data) and I like the clear bottom in the housing.
Aside from the fact the Jeep here disconnected my water detection circuit as they couldn't stop the fuel system trouble codes growing almost exponentially.....can't fix it - cut it out. SHEEESH.

Can't beat a transparent filter base for sighting dirt water or bubbles (as these substances have an attraction for one another) and the fact that you can reliably choose micron ratings as well as fit a fuel P gauge to a spare port (as well as a temperature gauge) to gauge when the fuel flow is being affected through the system by plugging....and I had a feeling this China thing would come our way. Seems it has finally done so.
Thanks for the confirmation.
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