Little "explosion" turning the engine off....

dperezco · **Joined:** Wed Mar 23, 2011 7:41 am **Posts:** 21

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

Wobbly · **Posted:** Sat May 21, 2011 10:02 am

EGR Flow control valve not closing at shut down?

dperezco · **Joined:** Wed Mar 23, 2011 7:41 am **Posts:** 21

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.

Wobbly · **Posted:** Sat May 21, 2011 4:40 pm

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

mikey1273 · **Posted:** Sat May 21, 2011 4:59 pm

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

Glend · **Posted:** Sat May 21, 2011 5:41 pm

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.

dperezco · **Joined:** Wed Mar 23, 2011 7:41 am **Posts:** 21

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

Wobbly · **Posted:** Sun May 29, 2011 3:07 pm

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

dperezco · **Joined:** Wed Mar 23, 2011 7:41 am **Posts:** 21

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

Little "explosion" turning the engine off....

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