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Little "explosion" turning the engine off....
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Author:  dperezco [ Wed May 18, 2011 3:52 pm ]
Post subject:  Little "explosion" turning the engine off....

Hello;
During last month I've noticed a little "explosion" (like "poff"!!) turning the engine off. It seems to be produced at the exhaust manifold... Has anybody suffered from similar thing?

Thanks in advance....

Daniel

Author:  Wobbly [ Sat May 21, 2011 10:02 am ]
Post subject:  Re: Little "explosion" turning the engine off....

EGR Flow control valve not closing at shut down?

Author:  dperezco [ Sat May 21, 2011 4:26 pm ]
Post subject:  Re: Little "explosion" turning the engine off....

I've changed the ECU of my 2006'KJ and now is a ECU of a 2007'KJ.
The behaviour of the FCV is different from 2006 and 2007 (new reflash to avoid the premature breakdown of the FCV).
Anyone with a 2007 KJ that can confirm if I'm true?

Thanks.

Author:  Wobbly [ Sat May 21, 2011 4:40 pm ]
Post subject:  Re: Little "explosion" turning the engine off....

South Africa? Probably not many 2007 CRD owners on this board.

Author:  mikey1273 [ Sat May 21, 2011 4:59 pm ]
Post subject:  Re: Little "explosion" turning the engine off....

not too many 2007 crd owners here. there are some international owners on KJ country but the CRD forum is slower than here.

Author:  Glend [ Sat May 21, 2011 5:41 pm ]
Post subject:  Re: Little "explosion" turning the engine off....

Mine is a April 2007 build (one of the last I think), and I was unaware of an ECU flash for fixing FCV longevity. Since I am running the GDE tune its probably irrelevant to me now. I have never had a problem like the one described and the FCV works just fine. I do have a local friend with a 2005 CRD that had to replace his FCV (it failed) and he was concerned about the 'runaway' possibilities.

Author:  dperezco [ Sun May 29, 2011 2:56 pm ]
Post subject:  Re: Little "explosion" turning the engine off....

Hello;
I've opened the FCV and the plastic gear (it usually breaks off) is OK!!
The thing is; turning the engine off, the valve doesn't close, but the gears are OK!!
I think there must be an electric failure in the FCV.
Has anybody suffered anything similar?

Thanks in advance.

Daniel

Author:  Wobbly [ Sun May 29, 2011 3:07 pm ]
Post subject:  Re: Little "explosion" turning the engine off....

Is the ECU commanding the FCV to close? Probably a pulse width modulation signal. Measure DC voltage feeding the FCV at engine shutdown.

Author:  dperezco [ Sun May 29, 2011 3:23 pm ]
Post subject:  Re: Little "explosion" turning the engine off....

Yes, I think the ECU is OK because this is the second FCV broken.
The other I replaced, worked perfectly until one month ago.
I've opened the first that broken off (it isn't mounted now) and I saw the gears are OK.

I think both FCV has the same failure....

Thanks

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