TBI / ECM tuning options. Chip / Burn / etc.

[ODaily]

This thread begins with my truck (93 5.7 stock TBI) having a too free flowing exhaust. The Check Engine light is always on because of the lack of backpressure for the EGR system. Basically, I've tolerated it for too long, and I've started looking at my options, which are..... Not Good.

As I understand it:

Burning / Reburning the stock chip is a PITA and simply not practical.

Switching to a flash based chip instead of the oem UV chip is recommended, but I need appropriate support hardware. Everyone recommends Moates. It looks like Moates has gone out of business.

The third and most drastic option is to rip out the stock PCM and replace it with something completely aftermarket such as a Megasquirt or a Speeduino. However this could be fairly expensive, and what I'm seeing on google suggests that running it with a 4L60E may be either unworkable or extra expensive.

Any thoughts on what is available and reasonable? For today, I'd just like to turn the EGR check off. That said, a 383 is on the someday list, and it'd be nice to future proof it a little.
Also, just FYI, I'm seriously not interested in an LS. Yes it's better, yes it's probably easier, but I personally just want to keep the TBI for my own personal selfish reasons.

 

[Drunkcanuk]

This thread begins with my truck (93 5.7 stock TBI) having a too free flowing exhaust. The Check Engine light is always on because of the lack of backpressure for the EGR system. Basically, I've tolerated it for too long, and I've started looking at my options, which are..... Not Good.

As I understand it:

Burning / Reburning the stock chip is a PITA and simply not practical.

Switching to a flash based chip instead of the oem UV chip is recommended, but I need appropriate support hardware. Everyone recommends Moates. It looks like Moates has gone out of business.

The third and most drastic option is to rip out the stock PCM and replace it with something completely aftermarket such as a Megasquirt or a Speeduino. However this could be fairly expensive, and what I'm seeing on google suggests that running it with a 4L60E may be either unworkable or extra expensive.

Any thoughts on what is available and reasonable? For today, I'd just like to turn the EGR check off. That said, a 383 is on the someday list, and it'd be nice to future proof it a little.
Also, just FYI, I'm seriously not interested in an LS. Yes it's better, yes it's probably easier, but I personally just want to keep the TBI for my own personal selfish reasons.

EBL Flash 2

 

[Connorpod]

Boostednw.com has taken over Moates. I have bought a TBI-Chip based parts over the last few months from them. No complaints here.

 

[PlayingWithTBI]

This thread begins with my truck (93 5.7 stock TBI) having a too free flowing exhaust. The Check Engine light is always on because of the lack of backpressure for the EGR system.

Where did you get that idea?

EBL Flash 2

He's talking about running a 4L60E, which will require parallel controllers.

 

[Drunkcanuk]

Where did you get that idea?


He's talking about running a 4L60E, which will require parallel controllers.

Dang it....missed that....was late at night! Lol

 

[Scooterwrench]

TunerPro RT
Ebay burner/reader
27FS512 EEPROM(get two)
ALDL patch cord
Laptop
To make tuning on the fly;
Motortronic Corbra RT emulator.(hopefully in stock now)

All this will allow you to tune your ECM for engine mods as well as shift points and shift feel in the tranny.

 

[ODaily]

I'm looking at the Moates clones over on boostednw.com, and if I understand correctly, I need:

ADL 12 pin GM data logger (119.99)
GM1 memory adapter (54.99)
+ (2) 27FS512 chips (35.00)
+ (optional) ZIF Socket (19.99)

TunerPro RT (free)
Windows laptop with at least one USB port.

Did I miss anything? I'm going to need a wideband o2 at some point too, right?

Total cost 230 dollars and tax, plus one used laptop. Sounds Very doable. I have cash saved for a long shot item at an auction this weekend. I need to hang onto all of it until I see if I'm broke afterwards. If not, then I'll take the plunge, and start learning the gentle art of tuning.

 

[Scooterwrench]

I'm looking at the Moates clones over on boostednw.com, and if I understand correctly, I need:

ADL 12 pin GM data logger (119.99)
GM1 memory adapter (54.99)
+ (2) 27FS512 chips (35.00)
+ (optional) ZIF Socket (19.99)

TunerPro RT (free)
Windows laptop with at least one USB port.

Did I miss anything? I'm going to need a wideband o2 at some point too, right?

Total cost 230 dollars and tax, plus one used laptop. Sounds Very doable. I have cash saved for a long shot item at an auction this weekend. I need to hang onto all of it until I see if I'm broke afterwards. If not, then I'll take the plunge, and start learning the gentle art of tuning.

You've been looking for love in all the wrong places.
TunerPro is free with a $40 optional registration fee(recommended)
You can datalog in TunerPro so no need for a separate datalogger.

This is the easiest way to use those EEPROMS;

GM ECM MEM/CAL PROM Adapter with ZIF socket

GM OBD1 ECM MEM/CAL MEMCAL PROM Adapter with ZIF (Zero Insertion Force) socket Compare to Moates G1 Memory Adapter Allows you to use a custom programmed chip (not supplied) with your GM 66 pin MEM/CAL ECM. Note you will need to remove the cover to install this adapter however after that simply...

reddevilriver.com

ALDL cable

OBD Diagnostics, Inc. - OBD2 All-In-One Scan Tool w/ USB

The OBD2allinone pc scan tool to turn off the check engine light on OBD2 cars and trucks is made and sold by OBD Diagnostics Inc. Our automotive diagnostic tools can read and log any obd check engine code data.

obd2allinone.com

Chip burner/reader;

T48 TL866-3G hardware Programmer Support 28000 IC For SPI/Nor/NAND Flash/EMMC US | eBay

Super cool appearance ultra portable. hope you could understand. Support OS: Windows XP, 20032008, Vista Win7 WIN8 WIN10 WIN11. Simple and easy to use. Accessories 12ï¼Accessories depending on your choiceï¼.

rover.ebay.com

27SF512 EEPROMS;

xc_hide_links_from_guests_guests_error_hide_media

 

[Scooterwrench]

I copied and pasted the link to those EEPROM's off Amazon but it didn't come through but if you look them up you will find them sold as two for $18

 

[tayto]

make sure your EGR is a negative pressure unit. should have an N stamped on it. Not a P.

What EGR valve with headers? - Third Generation F-Body Message Boards

TBI - What EGR valve with headers? - Just as the question asks.what would be a better Egr valve to use with headers? I need to replace mine due to it causing a good pinging problem and the wonderful code 32 issue.I know there is a differance between negative and postive valves.Does anybody know?

www.thirdgen.org

i am curious as to what code is being stored. i have successfully blocked off the EGR with a plate on many GM vehicles of this era and never got a CEL. Yes it will run somewhat leaner when the computer commands EGR, but i doubt that will be an issue for your setup.