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!

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:

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.

Re: HP Tuners Tutorials - Part IV -Turn Off Exhaust Gas Recirculation EGR 1999-2001
 

to start off launch the VCM editor

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

http://67-72chevytrucks.com/vboard/a...1&d=1566873577

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.

http://67-72chevytrucks.com/vboard/a...1&d=1566873676

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

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

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

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

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

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?

Re: HP Tuners Tutorials
 

But amazing write up too, very informational with the goods!!!!!!!

Re: HP Tuners Tutorials
 

absolutely, as that changes displacement, compression, air flow, and volumetric efficiency, and VE Table is the mother of all tables

this is a great question but beyond this basic tutorial

Re: HP Tuners Tutorials
 

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

Re: HP Tuners Tutorials
 

my advice to a 20 year younger self would be, digest / consume all the free information you can before dropping any coin on books or videos etc. these days there is so much free info out there, you just have to look, two words for you: Forums, Forums. Find a specific forum for your vehicle, or for your engine, or jump on the HP Tuners forum, cover yourself up in some thick skin, as some guys are jerks, and ask a bunch of specific questions, filter out all the BS and build away.

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

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 System

P0412 Secondary Air Injection Switching Vavle A Circuit

P0418 Secondaery Air Injection System Control A Circuit

P1415 Secondary Air Injection (AIR) System Bank 1

P1416 Secondary Air Injection (AIR) System Bank 2

Now let's look at the Black Magic that it takes to disable these codes, we have two controls:

• SES Enable
• Error Mode

If it was up to me I would break it up into a third control so it would look more like this:

• SES (Enable / Disable)
  
• MIL (MIL On First Error, MIL on Second Error, No MIL Light)
  
• Report Code (On / Off)

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:

P0410

P0412 was already disabled by default

P0418

P1415

P1416

3. 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:

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

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

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

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

Re: HP Tuners Tutorials - Section D Disable the Secondary Air Injection Codes
 

and here is what caused the P0418 code to illuminate, it is enabled in the PCM and since we don't actually have an air pump any more, we might as well disable it, and it's cousin the P0410

Re: HP Tuners Tutorials - Section D Disable the Secondary Air Injection Codes
 

makes sense to disable the Secondary Air Injection codes since we don't have an air pump, P0410 and the P0418, the P0412 was already disabled from the factory by default, and then further down the list P1415 and P1416 get disabled as well

Re: HP Tuners Tutorials - Section D Disable the Secondary Air Injection Codes
 

don't be afraid to use long file names you can go as long as 256 characters I think, the days of the eight.three are long gone

Re: HP Tuners Tutorials - Section D Disable the Secondary Air Injection Codes
 

flash the PCM and have a beer

Re: HP Tuners Tutorials - Part V - Turn Off the Air Pump.
 

HP Tuners - Part V - Turn Off the Air Pump.

OK so we are back to Series 1. I know we are going back and forth between disabling codes (in Series 2) and turning off actual components but that is deliberate, I want us all to see what we are doing and why we are doing it.

Why bother, why go through all of this? Why not just unplug a component and be done with it, well cause it's like this, imagine you come home from work on Monday night and you just want to have a beer and watch the football game, but then your wife says honey, I am running late do you mind starting dinner, ok, now you get to have a beer, try to watch the game, while you cook dinner, ok, then grandma returns the two year old from day care and until your wife gets home you gotta watch her too, ok, now you get to have a beer, sort of watch the game, do your best to cook dinner, and kinda watch the kid?

See where I am going with this analogy/metaphor? The point is you want the PCM to PCM the engine, not the EGR, not the Air Pump, not the AC, not the traction control, and any other components that are no longer there. Why? because it takes away from the computing power, more specifically it now takes longer for the PCM to make the short term fuel trim adjustments and long term fuel adjustments, and adjustments based on the MAF or the O2 sensor feedback. Yeah it may be milliseconds but we are not talking about super computing power, that poor old PCM is 20 years old, I bet the iPhone watch has more processing power than it does, so every bit helps, I did not mean to sound condescending I was trying to make a point in a funny entertaining way.

So in this article we will actually disable the Air Pump, in addition to suppressing the diagnostic codes like we did in the last article. Keep in mind HP Tuners was developed by a third party and not by General Motors so in some cases they have an Enable / Disable button, in other cases you turn things on and off by sort of tricking the system. You do that by entering numbers or values that will never be reached as in this case the Air Pump is controlled by ECT, Engine Coolant Temperature. As it sits at 36 degrees right now, the Air Pump will not come on until the engine warms up hotter than 36*. So to make it never turn on we set it to 284* (Top Tip: when ever you don't know what values to put in the box, simply gaze at the bottom of the window you are in while hovering your mouse over the field or button you have questions about: in our case it says the values we can enter here fall between -40 and 285, well I tried 285 and it didn't like it so we settle for 284)

DISCLAIMER and I hate Disclaimers: We are doing this in the context of guys doing engine swaps into old Chevy trucks where we did not even install the air pump, I am not suggesting you turn off the Air Pump on your daily 1999-2007 trucks as there may be SMOG implications, etc.

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 D. (Our last saved file is always our starting point).

2. Make changes in the Editor, this time we will make changes only to the Air Pump settings found under Engine\General tab. Enter 284 in the box next to Disable ECT. This means do not turn on the Air Pump until the engine coolant temp reaches 284 degrees. (Additional instructions with each pic)

3. Save the changes you made to a new file and call it something like "09 - Disabled Air Pump"

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, honestly this guy likes to hide some gold nuggets in these sections:

Re: HP Tuners Tutorials - Part V - Turn Off the Air Pump.
 

typical click bait, the Air Pump

Re: HP Tuners Tutorials - Part V - Turn Off the Air Pump.
 

if you followed along you know we are beating this old VCM Editor horse to death, but it's worth it, I promise

Re: HP Tuners Tutorials - Part V - Turn Off the Air Pump.
 

some feature sets in HP Tuners have an actual Enable / Disable setting, but some do not. In this case we disable the Air Pump by setting the Engine Coolant temp so high that the Air Pump will never come on.

Re: HP Tuners Tutorials - Part V - Turn Off the Air Pump.
 

if you ever don't know what a button does just look at the bottom of the screen, there's usually an explanation, some are intuitive some are Google worthy

Re: HP Tuners Tutorials - Part V - Turn Off the Air Pump.
 

HP Tuners did a good job of giving you the range of values that can go into each field, though sometimes slight adjustments are necessary as in our case where the box will only take 284 instead of 285 without being pesky about it

Re: HP Tuners Tutorials - Part V - Turn Off the Air Pump.
 

as always we use our own prefix to index the order of files: 01, 02, ... 09 then name the file so that we know what we did in it six months from now

Re: HP Tuners Tutorials - Part V - Turn Off the Air Pump.
 

by now we can chew gum and flash our PCMs, but hey we're not bragging

Re: HP Tuners Tutorials
 

When time permits, can you show how to adjust VSS input? I have the 8000 ppm sending unit, CPU thinks I am cruising about 4 mph on the highway

Re: HP Tuners Tutorials
 

Did you already use the tire size wizard to enter your actual tire size and gear ratio? Remember lots of settings are relative, meaning they effect/rely on others. What gauge cluster are you ronnin'?

Re: HP Tuners Tutorials
 

Agreed, use the tire wizard. I'm a math guy and did all the calculations myself and it still came out about 10% off. Must be something the computer does that I'm not aware of. When I used the wizard, it came out perfect. Reads exactly the same as my GPS.

Re: HP Tuners Tutorials
 

Great information here! Lets keep this rolling, any info on enabling e-fans?

Re: HP Tuners Tutorials
 

thank you, wow - what a great topic for the advanced series, in the meantime please check out the docs or ask the question on this very active FaceBook Group

https://www.facebook.com/groups/2678...925/?ref=share

Re: HP Tuners Tutorials - Section E Disable the Fuel Level Sensor Codes
 

HP Tuners Section E Disable the Fuel Level Sensor Codes

Not another one of these, this is so boring I just want to make 600 hp on the dyno, ha ha.

I hope that if you find these articles boring by now, you take that as a good sign and this is becoming second nature to you. We learn through repetition, and I purposely did not bundle disabling all the codes into one article so that future Swappers can find a specific article easier, plus can you imagine me rambling on about disabling a dozen or so different sensor codes in one article??? these articles are too wordy as it is, lol

In prior posts I talk about the two schools of thought on how to go about disabling codes. Just like in the last article, we watch the PCM throw a code (this time because we did not use the OEM fuel tank) and then we 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 P0463 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 six Fuel Level Sensor codes, your PCM may be a little bit different:

P0461 Fuel Level Sensor A Circuit Range/Performance

P0462 Fuel Level Sensor A Circuit Low

P0463 Fuel Level Sensor A Circuit High

P1431 Fuel Level Sensor 2 Circuit Performance

P1432 Fuel Level Sensor 2 Circuit Low Voltage

P1433 Fuel Level Sensor 2 Circuit High Voltage

[Rant] Not sure if GM did that and HP Tuners is just pulling the descriptions, or if HP Tuners dropped the ball, but my OCD is trippin' on the fact that they went from Sensor A to Sensor 2, which should have been either Sensor A and Sensor B or Sensor 1 and Sensor 2 type of thing, ha ha, and the inconsistency in the descriptions, where are my meds? [/Rant]

Now let's look at the Black Magic that it takes to disable these codes, we have two controls:

• SES Enable
• Error Mode

If it was up to me I would break it up into a third control so it would look more like this:

• SES (Enable / Disable)
  
• MIL (MIL On First Error, MIL on Second Error, No MIL Light)
  
• Report Code (On / Off)

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 V. (Our last saved file is always our starting point).

2. Make changes in the Editor, this time we will make changes only to the Fuel Level Sensor codes under Engine Diag \ DTCs. Refer to the cheat sheet below and Disable the SES on these and set the MIL to No Error Reported, some may be disabled already by default:

P0461

P0462

P0463

P1431

P1432

P1433

3. Save the changes you made to a new file and call it something like "10 - Disabled Fuel Level Codes"

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:

Re: HP Tuners Tutorials - Section E Disable the Fuel Level Sensor Codes
 

Seriously bro? you are showing us a pic of a stock fuel tank! Awesome

Re: HP Tuners Tutorials - Section E Disable the Fuel Level Sensor Codes
 

I forgot to disable the P0463 code and sure enuff the PCM complained about the Fuel Level Sensor.

Re: HP Tuners Tutorials - Section E Disable the Fuel Level Sensor Codes
 

You are going to throw this code if you are not running the stock fuel tank.