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smokie more than normal
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=44049		 Page 1 of 1
Author:  kelticknight [ Wed Jun 10, 2009 5:04 pm ]
Post subject:  smokie more than normal
still having prob with it being smokie when taking off and when changing gears,seems more smokie than normal,its black smoke,has being serviced,injectors cleaned,preasure sensor cleaned,etc,we thinking maybe its getting too much air with snorkel and k&n air filter which is being changed soon,reason for this thought as weather condition here are wetter and damper,with snorkel pushing more air in,told some diesels dont like too much air as it messes up mixture,was thinking of cutting down some air being pushed in by snorkel, any thoughts
Author:  linewarbr [ Wed Jun 10, 2009 5:20 pm ]
Post subject: 
No worries about too much air, as there is no "mixture" in a diesel engine. The MAP sensor determines pressure only, not O2 content in the intake. Have you recently switched to a different filling station for fuel, or a new additive? It is my understanding that black smoke is an indication of more fuel being injected than the engine can completely combust, so it would have to be fuel quality or fuel pressure-related.
Author:  kelticknight [ Wed Jun 10, 2009 5:26 pm ]
Post subject: 
cheers for that,quality about the same,was putting in a additive every few tanks fills but havent added it in few weeks,

have checked the injectors,map sensor,connections,we checked the turbo and hoses
Author:  CATCRD [ Wed Jun 10, 2009 7:04 pm ]
Post subject: 
Have you checked the EGR valve? It could be stuck open.
Author:  dieseldoesit [ Wed Jun 10, 2009 7:07 pm ]
Post subject: 
CATCRD wrote:
Have you checked the EGR valve? It could be stuck open.


how do you check that? sorry for the noob question....
Author:  kelticknight [ Wed Jun 10, 2009 7:11 pm ]
Post subject: 
when you blow the tube going to it ,you can hear it flip open ,so sounds ok,unless it doesnt shut all the way
Author:  kelticknight [ Wed Jun 10, 2009 7:13 pm ]
Post subject: 
we checked it fast by disconecting the hose from egr valve to egr solinad and blew into to it to see if we could hear it open and close,
Author:  CATCRD [ Wed Jun 10, 2009 9:54 pm ]
Post subject: 
Are you talking about the flow control valve? That butterfly should be open when you remove the intercooler hose and look at it. It should move freely with fingertip pressure.

The EGR valve is much harder to check. You would have to take it off. It is down below the FCV and is hard to get to.
Author:  linewarbr [ Thu Jun 11, 2009 8:02 am ]
Post subject: 
You could try unplugging the Mass Air Flow sensor that plugs into the air intake between the airbox and the turbo. Doing this disables the EGR valve, which under normal circumstances, won't allow it to open. If it still behaves the same way, my personal suggestion (and what I would do - so if it's wrong, :oops: ) would be leave the MAF unplugged and run the Jeep hard for a day or two. Really get into the skinny pedal to blow out some of the soot that may have built up around the EGR valve. Then plug the MAF back in and do the same thing. Hopefully that will force out some of the soot built up on the intake side of the EGR valve.
Author:  kelticknight [ Thu Jun 11, 2009 8:30 am ]
Post subject: 
euro models dont have MAF,will open the egr value and see,i changed to stock air filter to see if it makes any difference
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