EGR and AIR Removal
 

Question is directly related to another thread I have at
https://www.thirdgen.org/forums/elec...e-34-help.html


Basically I have code34 and as I went through all the troubleshooting step to no avail I am suspecting (thanks for a recommendation of a fellow member on here) that the car is running in limp mode due to EGR problems (Code 32).


I think my egr is faulty due to a damaged EGR Solenoid which has seen better days. I cannot find a replacement for it and so I want to disable EGR alltogether. I wont remove the actual EGR Valve at least until I have to remove the plenum for something else, but I will remove the EGR Solenoid and block off all related vacum lines.
I have blank PROMs, programmer, Adapter and OBD Cable. I already read the BIN from a JET chip the PO did and have also sourced the stock bin. Actually my car has AKXZ chip however as I couldnt find it, I am basing stock on AKXY which should be the same but without VATS (I was told).
I am using 32B.xdf and 1227165_6E.adx in tunerpro.





My questions:
I read that to disable EGR you need to max and min out some values. In my tunerpro I have an option under Flags called "EGR Diagnostic (Err 32)". Can I simply put this to Not Set?
I also read that there is another place to modify when you remove the whole AIR system so that the car doesnt read rich more than it normally is. Can someone point me to the place based on the xdf and adx files I am using?

Re: EGR and AIR Removal
 

For clarity, this is the xdf I am using (rename to .xdf.
Not even sure if it is the correct one for my 1988 5.7TPI Auto with 3.27 9-bolt Diff.


Maybe I should try use the 6E_expanded?

Re: EGR and AIR Removal
 

If you want to make the EGR system work, any three way 12v solenoid valve from just about any vehicle would work. They typically have about a 35 ohm coil. You just want it hooked up so the EGR gets manifold vacuum when energized, and the manifold vacuum source is blocked with the valve vented to atmosphere on the 3rd port when not energized.

GD

Re: EGR and AIR Removal
 

https://www.thirdgen.org/forums/tpi/...ed-needed.html
Besides the malf 32 you need to max the mat for egr.

Re: EGR and AIR Removal
 

At this point I think I would prefer having egr removed as I also decrease the likelihood of having vacuum leaks.

Not sure I am understanding your instructions tuned... Will check again the post.

Can you perhaps confirm which xdf I should use?

Re: EGR and AIR Removal
 

87-88 uses 32B, 89 uses 6E.

AKXZ would be 88, therefore uses 32B.

You need to set minimum MAT temp EGR enable scalar to its maximum possible setting. This will prevent the EGR from ever turning on.

GD

Re: EGR and AIR Removal
 

Ok great. I assume that apart from setting MAT for EGR to highest I also need to disable the Err32 flag correct?

Also is there any better 32b xdf which has more details? Like the expanded 6e?

Re: EGR and AIR Removal
 

Actually I don't think you need to mess with the error 32 flag at all. With the enable temp set all the way up it will never attempt to turn the EGR on and therefore will not actually test the system either.

At least that's how it seems to work in 6E.

GD

Re: EGR and AIR Removal
 

Understood. Will try it out. Thanks GD.

Re: EGR and AIR Removal
 

Resurrecting an old thread but now I am really at the phase of having the car ready but still with the SES light on.
As I started this thread, I re-checked all possible cable connections related to the MAF, MAF Relay and MAF Burn-off. All seem in order. Even tried the relays manually.
Using WinALDL, I can see values changing from the MAF so I am assuming it is working fine.
Unfortunately it has been descreened by the PO.
As I wrote in this thread, I removed the SMOG Pump (put in a delete pulley instead) and I am sure the EGR is not at its best condition so I need to disable these.
I wouldnt like to switch to $6E (at least for now) not to introduce more variables and because I do not have a lot of time for the timebeing.
All I need to do is disable EGR and SMOG in an attempt to have the SES turn off and have the car not run in limp mode.
I have a programmer and some EEPROMs. My intention is to use a AKXY bin as I couldnt find a AKXZ bin. This should be the same but without VATS. (Not a problem for me).
As per 'GeneralDisorder's suggestion I will set the MAT temp to max to avoid having the EGR system kick in.
But where do I disable SMOG Pump. I know the $6E definition has a flag but the $32B doesnt. How do I go about it?
Your help is extremely appreciated as I need to have the car running decently. Currently I feel it is too rich due to the smell which burns your eyes.


Any other recommendations to run better? Perhaps disable and disconnect the 9th Injector (CSI)?

Thanks guys

Re: EGR and AIR Removal
 

I’m not sure where $32b air pump vs coolant temp is but here is how to do $6e.
https://www.thirdgen.org/forums/tpi/...ed-needed.html

Re: EGR and AIR Removal
 

Re: EGR and AIR Removal
 

Looks like I will be forced to consider switching to $6E as $32B is not so known / discovered.


If I were to do this, from what I researched, a BIN such as AUJM, AUJN, APYU, ARAD & ANYF are all for 1989 350, Auto, F-Body, Fed Emissions with 3.27 Gears should provide me with a stock tune and plugging in the $6E xdf file should show me the constants that I need.


How do I decide which bin to go for from the above? My engine is an Iron Head, 060 Overbore and stock 22lbs/hr injectors. Looking at reliability not performance.

Re: EGR and AIR Removal
 

Forgot to add that if I do the $6E conversion I will also check the NO FAN switch setting and disconnect the 9th Injector Connector.

Re: EGR and AIR Removal
 

Use AUJM, it was released in '90 for the Firebird. The others are either older or for the Camaro (AUJN).

RBob.

Re: EGR and AIR Removal
 

Thats strange. I found out from a website that those codes ( AUJM, AUJN, APYU, ARAD & ANYF) are all 1989 cars. A 1990 cars will probably use SD so it wont work for me if I understanding it right...

Re: EGR and AIR Removal
 

Re: EGR and AIR Removal
 

Can anyone suggest a good Broadcast code for MAF Firebird 1989 Auto 3.27 Fed Emissions?

Re: EGR and AIR Removal
 

Actually AUJM is listed as 1989 on Gearhead EFI site so it should be good to use.
Will let you know how it goes.

Re: EGR and AIR Removal
 

Correct, I stated it was released in '90. Not that it was for a '90 3rd gen. Being released in '90 is a good thing as it will have calibration fixes in it for the '89 MY.

RBob.

Re: EGR and AIR Removal
 

Yepp my bad :).

Thanks for your help. Will hopefully still have a drivable car after the weekend....

Re: EGR and AIR Removal