EGR Delete on crd. - Chrysler 300C Forum: 300C & SRT8 Forums
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post #1 of 57 (permalink) Old 06-02-2012, 08:06 AM Thread Starter
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EGR Delete on crd.

After my success yesterday with the swirl delete, I decided to try the EGR today.
So i fitted the resistor and fired the car up..all ok no CEL and no error codes, so I took the car for a run over the same 25 mile route as yesterday...The car ran perfect 37 mpg..no CEL or limp mode etc.

When i got back i connected the code reader and got error..check system 'Exhaust gas recirculation control' The air mass is too large.
Any idea what would cause that error. I'm assuming the egr valve is closed by default with no power...so i'm confused why i get that error

Alan.

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post #2 of 57 (permalink) Old 06-02-2012, 09:17 AM
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If you blank the EGR off you will get no error as the EGR is still opening as normal,( some cars will give an error of low flow,so then you drill a small hole in the blanking plate..VW SDI engine do this),if you keep the EGR shut via resistors it'll show a fault,mines deleted through the ECU via the predator...you need the ECU remapping if you don't want the EGR to work


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post #3 of 57 (permalink) Old 06-02-2012, 09:41 AM Thread Starter
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Ray,
The EGR plug is disconnected and AFAIK the valve is closed with no power so can't be opening..so should not need to be blanked.

Has anyone seen a EGR off the car and can say whether it is open or closed by default?

Like i said the car is running perfect..no CEL no limp mode, I will run as is and see how it goes.

Last edited by Boro al; 06-02-2012 at 09:50 AM.
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post #4 of 57 (permalink) Old 06-02-2012, 10:47 AM
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The valve is defaulted to closed. I have ran mine with an egr valve remotely wired.
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post #5 of 57 (permalink) Old 06-02-2012, 11:00 AM Thread Starter
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Thanks Si,
So if the valve is definitely closed with no power it won't need to be blocked off, I will run it with the error message while i find a solution as it does not seem to be causing a problem at the mo.

So currently running with no swirl and no egr.

Last edited by Boro al; 06-02-2012 at 11:01 AM.
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post #6 of 57 (permalink) Old 06-02-2012, 01:41 PM
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Al,it needs to be connected at the plug as the ECU will know the connection has been broken.....honestly you either need to blank it off or have the ECU remapped but the plug MUST be plugged in...all plugs must be plugged in on any sensor as they all talk to the ECU and if just one of them gves it the cold shoulder and is not talking,the ECU gets the hump and throws a wobbly...try this one out...unplug the MAF sensor,turn engine on,don't rev it,wait a few secs then turn engine off...plug in reader and bam fault code on reader but probably not on dash light,all sensors need to be connected to complete the circuit
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post #7 of 57 (permalink) Old 06-02-2012, 03:36 PM Thread Starter
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Ray,
I'm not doubting what you say, and i don't want to mislead anyone, i'm only reporting what i find.
As you say with the plug disconnected it threw a code and the message 'check component left egr positioner..signal wire open circuit' .

I didn't drive like that so i don't know if it was in limp mode.

Next i fitted the resistor to the disconnected plug and checked for codes with engine running and all ok..no codes..no eml.

Next i took the car for the 25 mile drive and as i reported the car drove perfect, no eml..no limp mode and 37 mpg, as i reported i checked for codes and got the code i reported 'egr control..the air mass is too large'

As i said this is with the EGR valve plug disconnected and the valve in the default closed position,

I'm no electronics expert but the resistor is preventing the open circuit that causes the pcm to throw the code, so as the car is running ok at the mo i will leave it as is and see how it goes while we work out what is causing the error message.

so at the moment the car is running with no swirl motor and no egr valve in the circuit and appears to be running perfect so we'll see how it goes

i am not recommending anyone do the egr mod untill we sort the error message.

I know what you mean about the maf sensor, i got the car back from the garage after it had new heater plugs and the eml was lit. i checked and had various codes including one for the maf sensor right, when i checked the right side maf plug was not clicked home,after i refitted it all the codes cleared

Last edited by Boro al; 06-02-2012 at 03:45 PM.
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post #8 of 57 (permalink) Old 06-02-2012, 04:07 PM
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I think I may have missed something here, but where is the info (resistor value, pin connections) for the EGR delete mod? Also, is it possible that the ECU might be looking for changes in other sensors: eg MAF, MAP in response to EGR commands? Although this interaction doesn't seem important for swirl flap operation, this may not be the situation for EGR, in which case Ray may be right in his assumption regarding the need for re-mapping the ECU. On the other hand, the ECU doesn't think the fault code is worth triggering limp mode, so maybe just reporting for information.
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post #9 of 57 (permalink) Old 06-02-2012, 04:11 PM
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It will run ok with some sensors off or knackered without putting the light on and going into limp mode but what I'm saying is the easiest way of deleting the EGR is to blank it off..kudos to you for the swirly thing but I think you'll suffer with an EGR resistor delete....( you watch the git prove me wrong...lol)..... but he won't.....lol

Last edited by UK CHRYSLER 300C; 06-02-2012 at 04:11 PM.
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post #10 of 57 (permalink) Old 06-02-2012, 04:46 PM Thread Starter
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ha ha..You may well be right, bear in mind there is no scientific thinking on my part..I have no idea whether this is going to work and i have nothing to work from.

It is purely an experiment based on the success with the swirl.

As i said in the other thread i was just going to give it a try, and so today as i had a spare resistor i gave it a go, and as the car is currently running ok with no swirl or egr i am going to carry on and see how it goes, but as i have said performance and fuel consumption are ok,

I have no interest in paying for a remap or even blanking the egr and i just want to see what is possible for 26 pence lol.

I don't want anyone else to try it and blame me when they screw their car up,
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