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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03:01 PM
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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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04:11 PM
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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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06:06 PM
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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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06:28 PM
Jan 20th, 2008
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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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10:53 AM
PFF
System Bot
stickpony Member
Posts: 1187 From: Pompano Beach, FL Registered: Jan 2008
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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06:45 PM
Jan 30th, 2008
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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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10:57 PM
Erik Member
Posts: 5625 From: Des Moines, Iowa Registered: Jul 2002
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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11:02 AM
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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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02:39 PM
1986 Fiero GT Member
Posts: 3383 From: Eden, NY USA Registered: Mar 2005
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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03:21 PM
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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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03:52 PM
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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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11:29 PM
Feb 12th, 2008
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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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07:38 AM
IXSLR8 Member
Posts: 674 From: Post Falls, ID, USA Registered: Sep 2004
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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01:12 PM
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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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06:37 PM
IXSLR8 Member
Posts: 674 From: Post Falls, ID, USA Registered: Sep 2004
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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06:50 PM
AJxtcman Member
Posts: 1098 From: Rock Hill SC Registered: Nov 2006
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.