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LS1 PCM on a Northstar by AJxtcman
Started on: 11-11-2007 09:38 PM
Replies: 272
Last post by: Will on 03-14-2012 07:42 AM
AJxtcman
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Report this Post01-12-2008 06:29 AM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
Yes.
I am working with new software that has aided in adjustments.

This would be for a 96 to 99 engine.

Lyndon Wester is working on a 2000 setup also. I better make sure about that. It has been a while since we talked about doing that.

[This message has been edited by AJxtcman (edited 01-12-2008).]

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Report this Post01-12-2008 03:01 PM Click Here to See the Profile for IXSLR8Send a Private Message to IXSLR8Direct Link to This Post
Great!

Basic Questions:

With the LS1 unit working on a 1996 engine:

1) will it require an earlier N* year throttle body to work properly?
2) does one need to replace any N* sensors with LS1 sensors even though the program was designed for the 4.0?
3) will your program run a N* with 272 duration cams?
4) do we need a laptop?
5) what temp does the LS1 kick the fan in at? By the way, what rad are you using in your fiero...stock or Nova?
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Report this Post01-12-2008 04:11 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
 
quote
Originally posted by IXSLR8:

Great!

Basic Questions:

With the LS1 unit working on a 1996 engine:

1) will it require an earlier N* year throttle body to work properly?
2) does one need to replace any N* sensors with LS1 sensors even though the program was designed for the 4.0?
3) will your program run a N* with 272 duration cams?
4) do we need a laptop?
5) what temp does the LS1 kick the fan in at? By the way, what rad are you using in your fiero...stock or Nova?


#1 You will need a 96 to 99 T-body
#2 I am running a Nothstar MAF sensor, but the LS1 may work better and you can mount it in the intake tube.
#3 Yes on the cams
#4No and Yes on the laptop. I will set it up to run correctly
#5 what temp would you like?

#6 stock 4 cylinder rad. it has never got hot.
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AJxtcman
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Report this Post01-12-2008 04:13 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post

AJxtcman

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we will talk about the POS that did not show up. Saturdays are by appointment only. Hmmmmmmmm. What does that mean?
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Report this Post01-12-2008 05:14 PM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonDirect Link to This Post
can you post some CSV scans, like showing narrowband, and stuff
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AJxtcman
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Report this Post01-12-2008 07:09 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
edit

[This message has been edited by AJxtcman (edited 03-05-2008).]

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AJxtcman
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Report this Post01-12-2008 07:14 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post

AJxtcman

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quote
Originally posted by darkhorizon:

can you post some CSV scans, like showing narrowband, and stuff


I am working on it now.
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IXSLR8
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Report this Post01-12-2008 10:53 PM Click Here to See the Profile for IXSLR8Send a Private Message to IXSLR8Direct Link to This Post
Thanks AJ!
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Report this Post01-18-2008 06:06 PM Click Here to See the Profile for IXSLR8Send a Private Message to IXSLR8Direct Link to This Post
AJ,

Does your LS1 run the N* EGR system stock or did you disable it?
Does the LS1 pass DEQ or emmissons or do I need to do two computers one for stock emissions another for proper performance?
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AJxtcman
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Report this Post01-18-2008 06:28 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
The factory did not use an EGR valve. This is true. When I was looking over the program I found it is listed , but disabled. I would think that would have set an IM readiness code, but it does not. This is very fast. I have the new 4.6L program in my car now.

[This message has been edited by AJxtcman (edited 03-05-2008).]

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AJxtcman
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Report this Post01-20-2008 10:53 AM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
I have a price for the basic PCM setup.
$499 for the program customised and loaded into a PCM.
$50 core charge a PCM.

The first and basic program is the following.
#1. 1996 to 1999 Northstar 4.6L or the 4.0L older engines can be converted to 1996 to 1999
#2. Manual trans only.


I can build harnesses.


I can't go lower on the PCM, but I can work with you on a harness or trade. Please contact me for details.

[This message has been edited by AJxtcman (edited 01-20-2008).]

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Report this Post01-20-2008 06:45 PM Click Here to See the Profile for stickponyClick Here to visit stickpony's HomePageSend a Private Message to stickponyDirect Link to This Post
Hey AJ, what do you think about the possibility of using one of your modded LS1 PCMS to run a built up 4.9L with higher displacement N* pistons, decked P&P heads to achieve 11.5:1-12:1 compression, hi-lift cam, allante intake, sbc intake valves and valvesprings, corvette throttle body, etc. the cadillac's displacement would be bumped up to 5.1L with the N* pistons, and the distributor would have to be eliminated and DIS added, but i think it is doable,.. whats your opinion on that? 4.9L users are limited with their options for programming the 4.9L, and all those mods might make using an LS1 worthwhile.
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AJxtcman
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Report this Post01-30-2008 07:27 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
LS1 coil schematics


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Report this Post02-02-2008 12:37 AM Click Here to See the Profile for philbur120Send a Private Message to philbur120Direct Link to This Post
Any news on the 2000+ program?
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AJxtcman
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Report this Post02-02-2008 09:35 AM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
I will have to ask.
I will get back to you
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Report this Post02-02-2008 09:31 PM Click Here to See the Profile for Dave E BouySend a Private Message to Dave E BouyDirect Link to This Post
 
quote
Originally posted by philbur120:

Any news on the 2000+ program?

hmmmmmm?
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AJxtcman
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Report this Post02-08-2008 02:13 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
 
quote
Originally posted by THE BEAST:

AJ I can't find my getrag speed sensor gear-wheel, and by the way looking good there!

JG






Yeah it is here
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Report this Post02-08-2008 06:46 PM Click Here to See the Profile for ErikSend a Private Message to ErikDirect Link to This Post
So, this ECM will not work and a 93-95 engine even if the TB is converted to 96-99 spec?
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AJxtcman
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Report this Post02-08-2008 07:04 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
 
quote
Originally posted by Erik:

So, this ECM will not work and a 93-95 engine even if the TB is converted to 96-99 spec?


It is a 96 to 99 manual trans setup.
You must convert a 93 to 95 Northstar to a 96. This is an OBD II setup. It came out of a 1999 car.
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1986 Fiero GT
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Report this Post02-08-2008 10:57 PM Click Here to See the Profile for 1986 Fiero GTSend a Private Message to 1986 Fiero GTDirect Link to This Post
What's required to swap a 93-95 N* to a 96-99 N*? This sounds very promising. One very small question I have...does PCM you're reprogramming still output the serial data accurately?
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Report this Post02-08-2008 11:34 PM Click Here to See the Profile for ErikSend a Private Message to ErikDirect Link to This Post
 
quote
Originally posted by AJxtcman:


It is a 96 to 99 manual trans setup.
You must convert a 93 to 95 Northstar to a 96. This is an OBD II setup. It came out of a 1999 car.

So thats the TB and MAF, and of course the OBD2 PCM and harness anything else? I am assuming the crank sensors are the same

[This message has been edited by Erik (edited 02-08-2008).]

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Report this Post02-09-2008 11:02 AM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
 
quote
Originally posted by 1986 Fiero GT:

What's required to swap a 93-95 N* to a 96-99 N*? This sounds very promising. One very small question I have...does PCM you're reprogramming still output the serial data accurately?


This is the GM PCM from the Blank. It ran a Northstar.

[This message has been edited by AJxtcman (edited 03-05-2008).]

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AJxtcman
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Report this Post02-09-2008 05:41 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post

AJxtcman

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quote
Originally posted by IXSLR8:

Thanks AJ!


I have it

I will start right in on it
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Report this Post02-09-2008 11:16 PM Click Here to See the Profile for 1986 Fiero GTSend a Private Message to 1986 Fiero GTDirect Link to This Post
 
quote
Originally posted by AJxtcman:


This is the GM PCM from the Shelby Series 1. It ran a Northstar.


Yea, I got that...does it output an accurate serial data line?
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Report this Post02-10-2008 01:00 PM Click Here to See the Profile for IXSLR8Send a Private Message to IXSLR8Direct Link to This Post
Looking forward to it. Let me know if you need any other questions answered. Thanks AJ.
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AJxtcman
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Report this Post02-10-2008 02:39 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
 
quote
Originally posted by 1986 Fiero GT:


Yea, I got that...does it output an accurate serial data line?


I am confused about the question. WTF are you talking about?
It spits out the data for the Blank! This car ran Class II only No UART. Yes It still spits out the same Class II data that the Blank used, wait the only thing they had connected was the Pass key module ( have it turned off ), and the IPC.
The Tach signal is a dedicated circuit.
The VSS output signal is a dedicated circuit.
The MIL is a dedicated circuit
The A/C request is a dedicated circuit
The fuel guage is a dedicated circuit
Now what kind of Data do you think you need?
Yes you can hook up a Tech II and use it just as GM designed it to be used on the Blank.

[This message has been edited by AJxtcman (edited 03-05-2008).]

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Report this Post02-10-2008 03:21 PM Click Here to See the Profile for 1986 Fiero GTSend a Private Message to 1986 Fiero GTDirect Link to This Post
 
quote
Originally posted by AJxtcman:


I am confused about the question. WTF are you talking about?
It spits out the data for the Shelby! This car ran Class II only No UART. Yes It still spits out the same Class II data that the Shelby used, wait the only thing they had connected was the Pass key module ( have it turned off ), and the IPC.
The Tach signal is a dedicated circuit.
The VSS output signal is a dedicated circuit.
The MIL is a dedicated circuit
The A/C request is a dedicated circuit
The fuel guage is a dedicated circuit
Now what kind of Data do you think you need?
Yes you can hook up a Tech II and use it just as GM designed it to be used on the Shelby.


Hmm...this may not work as well as I had thought then. I'll ask my question a different way, you mentioned this is an LSx PCM...does this mean it's the same as used in, for example a C5 'Vette, or a newer Z28, just reprogrammed to run a N*?
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AJxtcman
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Report this Post02-10-2008 03:52 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
 
quote
Originally posted by 1986 Fiero GT:


Hmm...this may not work as well as I had thought then. I'll ask my question a different way, you mentioned this is an LSx PCM...does this mean it's the same as used in, for example a C5 'Vette, or a newer Z28, just reprogrammed to run a N*?


It is the same PCM used in all Gen III/LS1 cars and trucks in 1999. Yes the same PCM was used up to 02 I believe
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AJxtcman
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Report this Post02-10-2008 03:54 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post

AJxtcman

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If you have not read this it uses a 96 to 99 Northstar ignition system. 4 coil packs and 1 ignition module.
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Report this Post02-10-2008 11:29 PM Click Here to See the Profile for 1986 Fiero GTSend a Private Message to 1986 Fiero GTDirect Link to This Post
 
quote
Originally posted by AJxtcman:


It is the same PCM used in all Gen III/LS1 cars and trucks in 1999. Yes the same PCM was used up to 02 I believe


Alright, that's the answer I was looking for. Sorry I wasn't really making sense about the serial data line...I think we were talking about the smae thing, just calling it something different. The serial data line is a single wire from the PCM run to the ALDL connector. It also drives many of the gauges and idiot lights, as will be my purpose. I was just trying to verify that the the re-engineered PCM still output this serial data. I suppose I really didn't need to ask this question to begin with, as the serial data signal is present in all OBDII vehicles. Definitely does sound like something I can make use of.
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AJxtcman
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Report this Post02-12-2008 07:21 AM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
I will need some more info.

Tire size
Final Drive Ratio
VSS Pulse Per Rev
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Report this Post02-12-2008 07:29 AM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post

AJxtcman

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I have a 4spd trans and I will count the pulses on 1 Rev, but if you are going to use a 5 or 6 spd it maybe different.
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Report this Post02-12-2008 07:38 AM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post

AJxtcman

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I need to know if you have headers or a preferred location for the O2 sensors. Stock works for me, but I can lengthen the O2 harnesses to a given length over stock.
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Report this Post02-12-2008 01:12 PM Click Here to See the Profile for IXSLR8Send a Private Message to IXSLR8Direct Link to This Post
1) I have headers that I made. I'm using a 3 inch high flow cat and a series 80 flowmaster. Cat is under the muffler (in the stock fiero V6 muffler location). I can weld in one or two bungs depending on your recommended O2 sensor set-up in the LS1.

2) Tire size is 255/40/ZR17

3) Final Drive ratio: I'm running the stock 1988 5 speed Getrag. I'll have to find the final drive ratio as I don't know what it is.

4) VSS Pulse per rev: I don't know that either. I'll have to find that out as well.

[This message has been edited by IXSLR8 (edited 02-12-2008).]

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Report this Post02-12-2008 01:53 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
5spd trans has 3.61
If I am incorrect someone let me know.
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Report this Post02-12-2008 06:37 PM Click Here to See the Profile for IXSLR8Send a Private Message to IXSLR8Direct Link to This Post
Here's what I found (Fiero online service guide) for the 1988 V6 manual 5speed: 1st: 3.50, 2nd: 2.05, 3rd: 1.38, 4th: 0.94, 5th: 0.72. Final gear ratio is 3.61 for the MG2.

This is true for both 1987 and 1988 years.
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Report this Post02-12-2008 06:50 PM Click Here to See the Profile for IXSLR8Send a Private Message to IXSLR8Direct Link to This Post

IXSLR8

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Not sure if this will help you AJ regarding the VSS. The fiero VSS outputs a digital, 4,000 pulses per mile signal according to this website: http://dtcc.cz28.com/swap/3800.htm
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AJxtcman
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Report this Post02-12-2008 11:01 PM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
WOW that gave me a 3 hour plus sidetrack. It led me to a new forum. I hope to get some new friends.
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Report this Post02-13-2008 10:40 AM Click Here to See the Profile for THE BEASTSend a Private Message to THE BEASTDirect Link to This Post
AJ. if you need my tire size, here it is: 285/30/19

JG
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Report this Post02-15-2008 08:09 AM Click Here to See the Profile for AJxtcmanSend a Private Message to AJxtcmanDirect Link to This Post
 
quote
Originally posted by IXSLR8:

Looking forward to it. Let me know if you need any other questions answered. Thanks AJ.


I have a question that came to mind.
The Oregon DEQ standards for an engine swap.
I remember reading information on installing a newer engine in an older car you had a choice of standards. I think I read this after I was in Wisconsin.
First standard was meet the spec for the car as it left the factory.
Second was meet the powertrain specs.

In Wisconsin the Emissions test for a 96 and newer is a plug in OBD check. I could make this work, but I will need to add post O2 sensors.
If I need to make it work for a Fiero I will need to add an EGR valve or it will not pass.
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