I just bought an 05 duramax and it has about 800 miles on it..I put a Edge box with attitude, afe cold air intake and a cat back exhaust...As soon as it was all hooked up it put the check engine light on...Some times it would get 29lbs of boost other times it would only get 15 and fall on its face...I dissconnected the edge box cleared all the codes and the check engine light still comes on and it runs like sh*t..(It doesnt pull past like 2800 rpm)..Any suggestions would be great.. When the check engine light is off it runs great with or with out the box..





sean

Your air intake is causing all your problems. put that part back to stock and enjoy.


DANEdited by: dwrat

http://dieselplace.com/forum/forum_posts.asp?TID=14266&K (http://dieselplace.com/forum/forum_posts.asp?TID=14266&KW=afe) W=afe Read here about the problems that the AFE can cause.

Thanks guys for your help and i will take it off and give it a try...Ill will keep you guys posted on it..

Ok i took of the AFE and the light still wont go out...I am new to this diesel stuff so any other help would be great...Truck still is very sluggish when light is on..

Did you clear the codes again? I had the AFE also it gave me problems too. Ever since I took it off no problems.

codes? we need codes?

You need to have the code cleared or it will still act up. The codes can clear themselves but it takes a few test cycles before they will clear.

Well i brought it back to the dealer today and they said it was the turbo learner wasnt hooked up,if there is such a thing...So far so good i will keep you guys posted...The dealership would not give me the codes though..

No kiddin', who would've thunk it. From Helms:



Turbocharger Learn Procedure



Circuit Description

The turbocharger learn procedure is performed automatically during each
ignition cycle by the ECM. Certain enable criteria must be met
for the ECM to perform this procedure. After each ignition cycle,
and before the enable criteria for the learn procedure have been met,
the ECM will use the previously learned value. If the ECM does
not have a previously learned value, it will default to a stored
calibrated value. The ECM will use this value until the enable
criteria have been met, and then it will perform the procedure to learn
the new value. If the ECM attempts to perform the procedure and
fails, diagnostic trouble codes (DTCs) P0046 or P2563 may set.

Put the AFE back on and let us know what happens....

No kiddin', who would've thunk it. From Helms:

Turbocharger Learn Procedure

Circuit Description
The turbocharger learn procedure is performed automatically during each ignition cycle by the ECM. Certain enable criteria must be met for the ECM to perform this procedure. After each ignition cycle, and before the enable criteria for the learn procedure have been met, the ECM will use the previously learned value. If the ECM does not have a previously learned value, it will default to a stored calibrated value. The ECM will use this value until the enable criteria have been met, and then it will perform the procedure to learn the new value. If the ECM attempts to perform the procedure and fails, diagnostic trouble codes (DTCs) P0046 or P2563 may set.



I cant believe he was telling me the truth..I though this was a made up thing...How does this all of a sudden come undone and not learn anymore though? Can it happen again?


sean

Put the AFE back on and let us know what happens....





i will once i know it is all good....I will keep you all posted..

Isnt that crazy how you spent your hard earned money on a truck and a dealer wont even give you the codes.........


I took my air box and made it look like a peice of swiss cheese........compliments of a post here on the board!!!

No kiddin', who would've thunk it. From Helms:

Turbocharger Learn Procedure

Circuit Description
The turbocharger learn procedure is performed automatically during each ignition cycle by the ECM. Certain enable criteria must be met for the ECM to perform this procedure. After each ignition cycle, and before the enable criteria for the learn procedure have been met, the ECM will use the previously learned value. If the ECM does not have a previously learned value, it will default to a stored calibrated value. The ECM will use this value until the enable criteria have been met, and then it will perform the procedure to learn the new value. If the ECM attempts to perform the procedure and fails, diagnostic trouble codes (DTCs) P0046 or P2563 may set.



I cant believe he was telling me the truth..I though this was a made up thing...How does this all of a sudden come undone and not learn anymore though? Can it happen again?


sean

Well, the Helms manual doesn't really say. . .



The only other thing it does say about the learn procedure is "The
turbocharger learn procedure is required when the following service
procedures have been performed:



- The turbocharger vane position control solenoid valve replacement

- The turbocharger vane position sensor replacement

- The engine control module (ECM) replacement

- Any service that disturbs the turbocharger components



IMPORTANT: Once the enable conditions have been met the throttle
must remain at idle. Do not change the accelerator pedal position
(APP) during this procedure.



1. The following conditions must be met for the ECM to perform the turbocharger learn procedure.



- The A/C is OFF.

- The vehicle is in Park or Neutral.

- Start and idle the engine.

- The engine coolant temperature (ECT) is more than 72*C (162*F).



2. After the enable conditions have been met for at least 60
seconds, turn OFF the ignition for at least 30 seconds. The
system should have learned the new turbocharger position."



Perhaps something got disturbed in your system, or a sensor was
bad? Who knows for sure. If they didn't replace any
components, I would venture to guess this won't be the last time you
have this problem. Something made it fail, I doubt it was a fluke
occurance.



Dennis

Perhaps something got disturbed in your system, or a sensor was bad? Who knows for sure. If they didn't replace any components, I would venture to guess this won't be the last time you have this problem. Something made it fail, I doubt it was a fluke occurance.

Dennis
[/QUOTE]


Great...http://www.dieselplace.com/forum/smileys/smiley7.gif That sucks....Do you think the edge box could have did this? Thanks for your help so far i appreciate it..Edited by: sean

Not too likely, there are a bunch of us that have put the J/A on and
none of us have this issue. It is likely isolated to your truck.
. . unfortunately for you.



Dennis

It is very unlikely that your turbo learn was lost. The AFE can cause a P0299 underboost code, due to the lower than nomal MAF sensor readings. The tech was probably told to do a relearn procedure by Tech Assistance like I was. This, and of course clearing the codes will correct the condition, temporarily. Clearing the codes is what really made your truck right again. If the P0299 occurs again, the truck will go into retard mode again. I have seen this several times now with LLY/AFE equipped trucks. Taking the AFE off cured them. AFE has a new filter out to correct this. Time will tell if it works. Edited by: Max Payne

It Taking the AFE off cured them. AFE has a new filter out to correct this. Time will tell if it works.





How would i know if i have the new filter or the old one that causes this problem????





sean

I put he cold air intake back on and have drove it for about 75 miles and had no check engine light on yet....I am not convinced it is fixed just yet....But i can say when i first hooked up the cold air intake and the edge box the light went on in the first 20 miles and ran like sh*t..I did not hook up the edge box yet, i want to do it slower this time one add on a week..





sean

You will know if you have the new filter if you take the filter off of the box and measure the inlet if the filter. The old filter has a rounded lip on the inside where the air enters the tube, and measures 3 1/2" across the opening. The new filter has no rounded edge and measures 4" across the opening. I am not talking about where the clamp sits, but just a little farther in than that. You can reach in with your hand and feel the rounded edge. Saul at AFE told me that the restriction was originally placed there to speed up the air for the MAF sensor, but appears to be causing turbulence at the MAF on the LLY. Testing both filters on the same 05, with the Tech 2 controlling the RPM @1500, showed a 77 G/S reading at the MAF with the old filter, and 91 G/S with the new filter. Stock measured 94 G/S. Also, the IAT reading did not improve over stock.Edited by: Max Payne

OK thanks for the info and i will check that with the air filter...So far so good though...I am going to try to hook the edge back up this weekend and see what happens.. Thank you everyone for all your help with this problem..

Ok it is now 2 or 3 days later with the cold air intake on...Yes the check engine light is also BACK ON..I took the cold air off and i am going to see if it resets itself or i will be back at the dealership on monday...Just figured i would keep you all posted...And i did not yet re- hook up the edge yet..

What version of the air filter are you using, the 3 1/2 or the 4 inch????

Thanks.

What version of the air filter are you using, the 3 1/2 or the 4 inch????

Thanks.


It measures 3 1/2 inches....Should i call AFE and tell them to swap the filter out for me? This system is only 4 days old..

They have been sending them out to all that request them. The person I was dealing with was Saul. Get one.

They have been sending them out to all that request them. The person I was dealing with was Saul. Get one.


I called AFE today and they said they would send me one out today...Thanks for all your help on this matter and everyone else who helped..





sean