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#1 |
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Re: HP Tuners Tutorials Section C Disable the Exhaust Gas Recirculation (EGR) Codes
HP Tuners Section C Disable the Exhaust Gas Recirculation (EGR) Codes (1999-2001 engines only)
Having disabled the Secondary O2 Sensor codes in Section A as well as the Evaporative Emission System (EVAP) Codes in Section B we move on to the EGR codes. This only applies to engines from 1999-2001 vehicles as the factory did away with EGR in 2002. We are doing a batch of codes at a time in this tutorial, but once you get through it once, you are welcome to disable all the necessary codes on your second LS Swap project all at once ha ha. It's worth repeating there are two schools of thought when it comes to LS Swaps and disabling the codes, some say drive the truck and see what codes it throws than research them a bit and if applicable, delete them. Nothing wrong with that method, but since I like to prep my PCM ahead of time before the engine even swallows a drop of gasoline, and especially since I know exactly what was deleted after all I deleted it, we might as well prevent those Codes from popping up ahead of time. Also and this may tip the scales, if you do your diligence and disable all the codes the best you can for the components you deleted than your MIL should not come on. However if it does, you should turn off the engine and look up the code rather than ignoring it assuming, eh it's probably for one of the items I deleted, and blindly press on with a glaring MIL. Hope you followed that logic. [Rant] I have always struggled with the concept of EGR, I mean I get what it's supposed to do (appease the Environmental Protection Agency), but here we are putting a fuel filter to clean our fuel, here we are putting an air filter to clean our air, and we are all sold on the idea of "cold air intake" so we build crazy air damn isolation contraptions for our intakes, and than we turn around and pump in the hottest, dirtiest of exhaust gases (I mean the gases that did not burn the first time around) into our intakes bypassing any and all filters. That's like hitting yourself in a head with a hammer cause it feels good when you stop, ha ha. I have seen people on forums actually claim how their cars run better cause of EGRs, um ok, well even the factory finally dropped the EGR scam in 2002 so there's that [/Rant] Tunistas let's meet the seven EGR codes: P0401 Exhaust Gas Recirculation FlowNow let's look at the Black Magic that it takes to disable these codes, we have two controls:
1. Again we start in the comfort of our own home, we fire up our laptop and launch the Editor. Open the file we saved in Step 3 of Section B. (Our last saved file is always our starting point). 2. Make changes in the Editor, this time we will make changes only to the Exhaust Gas Recirculation codes. Refer to the cheat sheet below and Disable the SES on these and set the MIL to No Error Reported: P04013. Save the changes you made to a new file and call it something like "06 - Disabled O2s & EVAP & EGR" 4. Now you get to move the operation to your truck, hook up your HP Tuner to the OBDII port and then your USB cable to your laptop, turn the key to the ON position, launch the Editor program, and simply write the new changes to the PCM. Note: sometimes you have to write the entire tune file to the PCM, sometimes it is perfectly happy with only writing what's changed, more on this later. More words with each pic: Last edited by Gregski; 11-08-2019 at 03:26 PM. |
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#2 |
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Re: HP Tuners Tutorials Section C Disable the Exhaust Gas Recirculation (EGR) Codes
if you have one of them fancy EGR hole block off plates or some other freeze plug in your (1999-2001) intake manifold like so, then you have opted to ditch your dirty exhaust gas recirculation sytem and may want to disable the error codes that are associated with it.
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#3 |
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Re: HP Tuners Tutorials Section C Disable the Exhaust Gas Recirculation (EGR) Codes
just a random pic of the ugly EGR tube port on the passenger side factory exhaust manifold (on the garage floor in the foreground), you can buy kits to block this off, or you can go to the junkyard and get a 2002 manifold that already has it closed off
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#4 |
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Re: HP Tuners Tutorials Section C Disable the Exhaust Gas Recirculation (EGR) Codes
out of the four EGR codes: P0401, P0402, P0404, and P0405 in my case one was already turned off from the factory, P0402 so we can learn from the way the factory did it, and set the other three to match
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#5 |
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Re: HP Tuners Tutorials Section C Disable the Exhaust Gas Recirculation (EGR) Codes
Set all the EGR codes: P0401, P0402, P0404, and P0405 to SES disabled and Error Mode to No Error Reported
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#6 |
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Re: HP Tuners Tutorials Section C Disable the Exhaust Gas Recirculation (EGR) Codes
we save our new configuration to a file with a new name, most likely just appending to the name
06 - Disabled 02s & EVAP & EGR.hpt baby steps, baby steps, but it all adds up |
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#7 |
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Re: HP Tuners Tutorials Section C Disable the Exhaust Gas Recirculation (EGR) Codes
after saving changes to our newly named file, we go to the truck and write / flash the PCM with our new configuration, and we're done!
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#8 |
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Re: HP Tuners Tutorials - Part IV -Turn Off Exhaust Gas Recirculation EGR 1999-2001
HP Tuners - Part IV - Turn Off Exhaust Gas Recirculation EGR. (1999-2001 donor engines only)
So there you are cruising on the freeway at approximately 70 MPH when all of a sudden the PCM commands the EGR valve to open and dump a bunch of dirty, hot, unburned exhaust gases into your intake manifold, bypassing your K&N air filter. The engine goes WTH, I can't burn this! And so the PCM commands more timing advance! Well except your EGR valve is on the garage floor, so you don't need all this extra timing, as there is no dirty gases entering your intake manifold. Since those of us using 1999-01 donor engines most likely ditched the EGR system, and disabled the seven EGR related codes in Section C (ie the last article) we might as well do a little tuning and eliminate the need for more timing advance do to EGR. Your engine runs off of a main Spark table but then there are a number of timing tables that modify the timing depending on the conditions and engine needs. The EGR Base table is one of those modifiers, and if there is no EGR there is no need for the modifications. [Confusion] For those of you following along, you may have noticed that I changed the article naming conventions, in Serries 1 articles which we called Housekeeping we used Part I, Part II, etc as the titles... where as in Series 2 which focuses on Code Deletes we call the articles Section A, Section B, etc. that is deliberate as it allows us to inject articles into each Series. What the hell are you talking about? Well when tuning you will realize that there comes a time when you need to Zig Zag a little bit and everything does not always happen in perfect order. So we return back to the first Series and add Part IV.[/Confusion] 1. Again we start in the comfort of our own home, we fire up our laptop and launch the Editor. Open the file we saved in Step 3 of Section C. (Our last saved file is always our starting point). 2. Make changes in the Editor, this time we will make changes effecting the EGR. First we edit the EGR Base table found under Engine\Spark\Advance. Zero out any cells that are not green, ie contain 0s already. There are many ways to do this but for beginners just go to each cell and type 0 and move on to the next one. Then we show the Navigator tree view by clicking on Edit \ Navigator and go to the Exhaust yellow folder and on the right in the General section next to Enabled we use the pulldown and select Disabled. Finally under Engine \ General \ Airflow we zero out that entire table. (Additional instructions with each pic) 3. Save the changes you made to a new file and call it something like "07 - EGR Base Tuning" 4. Now you get to move the operation to your truck, hook up your HP Tuner to the OBDII port and then your USB cable to your laptop, turn the key to the ON position, launch the Editor program, and simply write the new changes to the PCM. Note: sometimes you have to write the entire tune file to the PCM, sometimes it is perfectly happy with only writing what's changed, more on this later. More words with each pic: Last edited by Gregski; 11-03-2019 at 10:10 AM. |
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#9 |
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Re: HP Tuners Tutorials - Part IV -Turn Off Exhaust Gas Recirculation EGR 1999-2001
on the 1999-2001 donor LS truck engines it is a common mod to delete the EGR valve and block off the opening on the passenger side stock exhaust manifold like so, though I prefer to go to the junkyard and just buy a stock factory exhaust manifold off of a 2002 or newer vehicle which already does not have this ugly appendage.
Last edited by Gregski; 11-03-2019 at 10:12 AM. |
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#10 |
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Re: HP Tuners Tutorials - Part IV -Turn Off Exhaust Gas Recirculation EGR 1999-2001
to start off launch the VCM editor
Last edited by Gregski; 10-28-2019 at 02:37 AM. |
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#11 |
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Re: HP Tuners Tutorials - Part IV -Turn Off Exhaust Gas Recirculation EGR 1999-2001
First we show the Navigator tree view by clicking on Edit \ Navigator
and go to the Exhaust yellow folder and on the right in the General section next to Enabled we use the pulldown and select Disabled. Next under Engine \ General \ Airflow we zero out that entire table. (no screen shot provided) Below we will be making changes under Engine \ Spark \ Advance \ EGR Base table Last edited by Gregski; 10-28-2019 at 02:53 AM. |
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#12 |
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Re: HP Tuners Tutorials - Part IV -Turn Off Exhaust Gas Recirculation EGR 1999-2001
here you can see the stock configuration and how much extra timing advance the computer will try to add at certain RPMs so for example at 2,400 RPM and .25 grams of air the computer will try to add 10 degrees of extra timing, great if you are dumping dirty exhaust gases into your intake manifold, not needed if you are not
Last edited by Gregski; 10-28-2019 at 02:43 AM. |
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#13 |
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Re: HP Tuners Tutorials - Part IV -Turn Off Exhaust Gas Recirculation EGR 1999-2001
here in order to keep things simple I just clicked each cell that had a number in it greater than 0 and typed a 0 in it's place then I arrowed over to the next cell, you can just highlight a region and type a 0 in the white box above in the menu bar next to the X multiplication icon and then press the = equals sign and that will set them all to zero in one fell swoop, tomato tomatoe
Last edited by Gregski; 10-28-2019 at 02:43 AM. |
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#14 |
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Re: HP Tuners Tutorials - Part IV -Turn Off Exhaust Gas Recirculation EGR 1999-2001
as always we increase our index from 06 to 07 to force the files to stay in order of achievement and we name the file something meaningful like 07 - EGR Base Tuning
Last edited by Gregski; 10-28-2019 at 02:45 AM. |
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#15 |
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Re: HP Tuners Tutorials - Part IV -Turn Off Exhaust Gas Recirculation EGR 1999-2001
as a final step we write / flash our changes to the PCM and we are done, one small change at a time, test drive your rig for a week or so to ensure it likes the changes before making any others
Last edited by Gregski; 10-28-2019 at 02:44 AM. |
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#16 |
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Re: HP Tuners Tutorials
So I have a question,
Lets say you had your heads re-ported and the cylinders bored out....would you have to change any values in HP tuners? |
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#17 |
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Re: HP Tuners Tutorials
But amazing write up too, very informational with the goods!!!!!!!
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#18 | |
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Re: HP Tuners Tutorials
Quote:
this is a great question but beyond this basic tutorial Last edited by Gregski; 09-18-2019 at 09:14 AM. |
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#19 | |
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Re: HP Tuners Tutorials
Quote:
Sorry for the late reply, school started back up and midterms around the corner. I figured it would be a on the complicated side so this leads up to my next question. Would the getting the book from the tuning school be worth getting? Thank you, double |
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#20 | |
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Re: HP Tuners Tutorials
Quote:
I have not used the tuning school materials so I can't recommend them. I would suggest you consume as many YouTube videos as you can, but don't watch 12 hours worth in one day, watch an hour every other day, know what I'm saying, let your brain rest. Here are some smart dudes that I enjoy watching. Oh, just because a video is not exactly about what you need, watch it anyway it may give you the foundation you need to build on, then you will find they all have 70% the same content, but it's that last 30% where you find the gold nuggets. Yes I've watched some of these videos and barely understood 10% the first time, that's ok, there is a lot of information, so grab a cold one and watch them a few times, it's all good we all learn at different speeds, I applaud you for taking this on rather than [ahem] gaming, ha ha In closing you will find a lot more dudes are doing write ups on what you are doing than what I am documenting in this thread, because seems like everyone wants to run before they can walk, ha ha. Mega Mechatronics Engine Tuning 101 - Part 1 - Intro, Lambda, Wideband Last edited by Gregski; 11-03-2019 at 10:17 AM. |
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#21 |
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Re: HP Tuners Tutorials - Section D Disable the Secondary Air Injection Codes
HP Tuners Section D Disable the Secondary Air Injection Codes
So we continue disabling codes for the components we chose not to use after our LS engine swaps. The air pump probably didn't even make it to you and is still attached to the donor vehicles passenger side firewall back at the wrecking yard, making the code easy to miss when disabling all the codes ahead of time. It's job was once to add more air to our exhaust manifolds to help burn more of the unburnable gases, ha ha since you need oxygen to burn things. In prior posts I talk about the two schools of thought on how to go about disabling codes. So far we have been disabling them ahead of time because we knew what aparatus we were deleting, but in this write up, we watch the PCM throw a code and then go after it. I should have used HP Tuners as my Code Reader this being an HP Tuners tutorial and all, but I wasn't thinking about doing the tutorial at that time so I caught the P0418 code using my Insight Edge CTS2 digital display (pronounced: "expensive"), but any OBDII code reader will find the same codes if you don't own HP Tuners and are just following along for understandability. On my 2001 Siera donor PCM there were five Secondary Air Injection codes, your PCM may be a little bit different: P0410 Secondary Air Injection SystemNow let's look at the Black Magic that it takes to disable these codes, we have two controls:
1. Again we start in the comfort of our own home, we fire up our laptop and launch the Editor. Open the file we saved in Step 3 of Part IV. (Our last saved file is always our starting point). 2. Make changes in the Editor, this time we will make changes only to the Secondary Air Injection codes. Refer to the cheat sheet below and Disable the SES on these and set the MIL to No Error Reported: P04103. Save the changes you made to a new file and call it something like "08 - Disabled Secondary Air Injection" 4. Now you get to move the operation to your truck, hook up your HP Tuner to the OBDII port and then your USB cable to your laptop, turn the key to the ON position, launch the Editor program, and simply write the new changes to the PCM. Note: sometimes you have to write the entire tune file to the PCM, sometimes it is perfectly happy with only writing what's changed, more on this later. More words with each pic: Last edited by Gregski; 11-08-2019 at 03:28 PM. |
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#22 |
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Re: HP Tuners Tutorials - Section D Disable the Secondary Air Injection Codes
I snagged this pic from a YouTube video:
How to change Air Injection Pump - 2002 Chevy Tahoe I think the Chevy trucks have it in the same location, I'm no expert on the components we don't tend to use, ha ha |
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#23 |
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Re: HP Tuners Tutorials - Section D Disable the Secondary Air Injection Codes
I strongly suggest you connect your MIL (ie check engine light) prior to your first fire up post LS Swap and hook up a code reader, the PCM is able to tell you the errors so might as well go look for them, of course fingers crossed you're hoping not to see any, but if you do, some may be a quick resolve, such as the P0418 Secondaery Air Injection System Control A Circuit
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#24 |
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Re: HP Tuners Tutorials - Section D Disable the Secondary Air Injection Codes
P0418 Secondaery Air Injection System Control A Circuit code gets thrown if you deleted the air pump during your LS Swap
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#25 |
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Re: HP Tuners Tutorials - Section D Disable the Secondary Air Injection Codes
some day we will use the VCM Scanner, but today we continue to use our work horse the VCM Editor
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