Install EFI connection LSX PCM
TECH Regular
Joined: Jan 2005
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I got my kit and 01-02 pcm today and I have a few questions, do I reuse the LT1 crank position sensor or do I need to buy one from EFI Connection? Also where are you guys getting your base tunes done, I have a 383, 11.8:1 scr, 6" 4340 rods, 4340 forged crank, 847 cam, le3 heads & ported intake, 58 mm tb, Pacesetter LTs, 3" td exhaust, m6, no egr, no airpump. Thanks for any help you guys can give, also are the spark plug connectors the same for the LS1 and LS2 coils?
24x Crankshaft Reluctor and Sensor
GM’s 24x crank sensor is required for the 24x installation. The 96-97 LT1’s 4x crank sensor is not compatible with the 24x crank reluctor.
GM’s 24x crank sensor is required for the 24x installation. The 96-97 LT1’s 4x crank sensor is not compatible with the 24x crank reluctor.
Last edited by S10Wildside; Oct 20, 2009 at 05:47 AM.
TECH Regular
Joined: Jan 2005
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"Diagnostic Trouble Codes" (DTCs) means a lot of different things. In the OBDI days, the source of DTCs was the the ECM. By the time OBDII came around, there were other modules that could set DTCs. DTCs beginning with the letter P are sourced from the PCM. The 24x conversion is all about using the LS1 PCM and satisifying its requirements so that you do not set DTCs. But of course you are going to see DTCs if loading, for example, a Corvette calibration into the LS1 for the 24x conversion. Fuel level sensor, alternator control, and any other functionality used in the Corvette but not in the retrofit vehicle. So these are bogus DTCs that can be eliminated in the PCM calibration using HP Tuners or EFILive. Does this sound like a bad thing? Well, I could take a 2000 Corvette, enable all possible DTCs through the calibration, and set off an amazing amount of DTCs.
Think of it this way. GM begins with an all-inclusive calibration in the PCM and disables/enables what is required for the vehicle it's being used with. This is what 24x swappers are doing, too.
By the time you're done, you will have no DTCs unless there is a "real" problem with your engine/transmission/etc.
Would a car with this set up be able to pass an OBDII scan emissions test?
Thanks S10wildside for all of your help and info, hopefully in the next week I'll have the money to order the complete wiring harness. Do you guys have any m6 harnesses ready now or do you guys do them on a per order basis.
TECH Regular
Joined: Jan 2005
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There are many different harnesses for fourth-gen F-bodies...
- 93 Camaro/Firebird 4L60 (no lockup control)
- 93 Camaro/Firebird 4L60E
- 93 Camaro/Firebird 4L80E
- 93 Camaro/Firebird M6
- 94 Camaro/Firebird 4L60E
- 94 Camaro/Firebird 4L80E
- 94 Camaro/Firebird M6
- 95 Camaro/Firebird 4L60E
- 95 Camaro/Firebird 4L80E
- 95 Camaro/Firebird M6
- 96 thru 97 Camaro/Firebird 4L60E
- 96 thru 97 Camaro/Firebird 4L80E
- 96 thru 97 Camaro/Firebird M6
Then there are the exceptions where the following is requested...
Nitrous Signal Wire to PCM
EFILive use. When a ground is applied to the wire, the PCM is "armed" for nitrous control. Set the spark and fuel multiplier tables and then parameters for entering those tables. Very cool!
VersaFueler Support
Low-impedance injector driver module. We cut off the Deutsch connectors, install Delphi connectors and integrate the VersaFueler into the harness. The VersaFueler is plug and play with PCM to Versafueler and Versafueler to Injectors (PCM > VersaFueler > Injectors). Want to remove the VersaFueler later? No problem; disconnect it and plug in the mating engine harness connectors to restore PCM to injector connection (PCM > Injectors).
Other Variations
Harnesses have been built with extra lengths for O2s (eliminate extensions), 5 wire MAF, A4 and M6 control (when a transmission swap is expected in the future), MAP signal breakout under dash for boost gauge, etc.
Last edited by S10Wildside; Oct 24, 2009 at 07:41 AM.
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Brett Foote Cool thanks S10wildside, about how long does it take to build the harness, I have a 94 Z28 m6 and I have relocated the altenator to the drivers side where the AIR pump used to be so I'll need an extended altenator charging wire. I'm keeping everything (a/c, ps etc) except the EGR, and AIR pump.
I also will be running Nitrous and have HPT Pro, does HPT have the ability to control nitrous like EFI Live, if so I'd like that option?
I also will be running Nitrous and have HPT Pro, does HPT have the ability to control nitrous like EFI Live, if so I'd like that option?
TECH Regular
Joined: Jan 2005
Posts: 456
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Cool thanks S10wildside, about how long does it take to build the harness, I have a 94 Z28 m6 and I have relocated the altenator to the drivers side where the AIR pump used to be so I'll need an extended altenator charging wire. I'm keeping everything (a/c, ps etc) except the EGR, and AIR pump.
I also will be running Nitrous and have HPT Pro, does HPT have the ability to control nitrous like EFI Live, if so I'd like that option?
I also will be running Nitrous and have HPT Pro, does HPT have the ability to control nitrous like EFI Live, if so I'd like that option?
We've been using EFILive and haven't looked into HP Tuners, so I'm not sure if HP Tuners supports a nitrous calibration.
Decided to bite the bullet and go with this system for ease of tuning on my aggressive 93 383 build. Will be a few weeks before I order, but I calculated I could complete it for $1300...cheaper if I scope out local Pull-and-Save yards, but Camaro stuff disappears so fast here I won't even bother.
Looking forward to the process...and explaining to my speed shop that I need an LSX tune for my 93 LT1 with a 95 LTX stroker engine
.
Looking forward to the process...and explaining to my speed shop that I need an LSX tune for my 93 LT1 with a 95 LTX stroker engine
. 
T/A Kid,
I was looking at the pin outs for the 94-97 and there are 2 different places where the LS-1 PCM has a single ground vs 3-4 grounds for the LT-1 harness's.
How did you work that out?
I will be doing my car as well as a 93 Z28.
I was looking at the pin outs for the 94-97 and there are 2 different places where the LS-1 PCM has a single ground vs 3-4 grounds for the LT-1 harness's.
How did you work that out?
I will be doing my car as well as a 93 Z28.
T/A Kid,
I was looking at the pin outs for the 94-97 and there are 2 different places where the LS-1 PCM has a single ground vs 3-4 grounds for the LT-1 harness's.
How did you work that out?
I was looking at the pin outs for the 94-97 and there are 2 different places where the LS-1 PCM has a single ground vs 3-4 grounds for the LT-1 harness's.
How did you work that out?
On the LT1 side it gives the option for one of the 4 grounds, you'll still use all 4 though. Does that make sense? Theres 4 LT1 grounds and 4 LS1 grounds not 2.
Teching In
Joined: Feb 2009
Posts: 2
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I'm interested in hearing what will not work in a 1994 6-speed OBD1 Trans Am if I switch to the LS1 computer. I'm talking aobut things like stock gages, ABS, cruise, air bags, airconditioning, etc. What's plug and play and what isn't.
Will the EFI Conection/LS1 electronic throttle/cruise conversion work with the 1994 factory cruise controls?
How is the LS1 OBD2 port installed? Is the OBD port a direct connection to the underhood computer? Is there a seperate "body computer" on these cars, i.e. is the underhood computer just for the engine/trans?
Will the EFI Conection/LS1 electronic throttle/cruise conversion work with the 1994 factory cruise controls?
How is the LS1 OBD2 port installed? Is the OBD port a direct connection to the underhood computer? Is there a seperate "body computer" on these cars, i.e. is the underhood computer just for the engine/trans?
Simple, if you look at the 4 grounds they are all the same numbers. Just pick one for each ground and on the next ground you'll have three to choose from, pick one again and on the third ground you'll have two to choose from, etc.
On the LT1 side it gives the option for one of the 4 grounds, you'll still use all 4 though. Does that make sense? Theres 4 LT1 grounds and 4 LS1 grounds not 2.
On the LT1 side it gives the option for one of the 4 grounds, you'll still use all 4 though. Does that make sense? Theres 4 LT1 grounds and 4 LS1 grounds not 2.
The 4 on the LT-1 are put in separate slots on the LS-1.
I'm interested in hearing what will not work in a 1994 6-speed OBD1 Trans Am if I switch to the LS1 computer. I'm talking aobut things like stock gages, ABS, cruise, air bags, airconditioning, etc. What's plug and play and what isn't.
Will the EFI Conection/LS1 electronic throttle/cruise conversion work with the 1994 factory cruise controls?
How is the LS1 OBD2 port installed? Is the OBD port a direct connection to the underhood computer? Is there a seperate "body computer" on these cars, i.e. is the underhood computer just for the engine/trans?
Will the EFI Conection/LS1 electronic throttle/cruise conversion work with the 1994 factory cruise controls?
How is the LS1 OBD2 port installed? Is the OBD port a direct connection to the underhood computer? Is there a seperate "body computer" on these cars, i.e. is the underhood computer just for the engine/trans?
I have the same thing.
Staging Lane
Joined: Jun 2004
Posts: 69
Likes: 0
From: Homer Glen, IL
Well I tried to fire it up over the weekend....All I get is Crank crank crank crank, only fault code is P1336, which is to be expected. Guess I need to see if the injectors are getting a signal, which they should be as I am getting a spark signal. Timing was triple checked before buttoning it all up. Thinking about it is making my head hurt.....
