Will a 94 computer work in a 93.
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Joined: Feb 2002
Posts: 5,645
From: Bridgewater, MA
Re: Will a 94 computer work in a 93.
Originally Posted by Mahoney
I have a 93 z28 with a six speed. I want to use a computer out of a 94-95 z28. Can I use the computer from the 94 or is there a difference in the wiring harness?
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From: Hell was full so they sent me to NJ
Re: Will a 94 computer work in a 93.
You're going to have an interface problem with the injectors. The 94 PCM hs 8 individual injector connections for the sequential injection. That means you need a wire to each injector, not one wire per bank like the 93 harness has.
The 94 PCM will also be looking for the skip shift solenoid - no big deal, solved with the resistor. Not sure if the speedo output of the 93 VSS is compatible with the 94 PCM input. Needs to be checked.
The 94 PCM will also be looking for the skip shift solenoid - no big deal, solved with the resistor. Not sure if the speedo output of the 93 VSS is compatible with the 94 PCM input. Needs to be checked.
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Joined: Feb 2002
Posts: 5,645
From: Bridgewater, MA
Re: Will a 94 computer work in a 93.
Originally Posted by Injuneer
You're going to have an interface problem with the injectors. The 94 PCM hs 8 individual injector connections for the sequential injection. That means you need a wire to each injector, not one wire per bank like the 93 harness has.
The 94 PCM will also be looking for the skip shift solenoid - no big deal, solved with the resistor. Not sure if the speedo output of the 93 VSS is compatible with the 94 PCM input. Needs to be checked.
The 94 PCM will also be looking for the skip shift solenoid - no big deal, solved with the resistor. Not sure if the speedo output of the 93 VSS is compatible with the 94 PCM input. Needs to be checked.
$DA3 16159278 93 F CAR 5.7L, LT1
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Joined: Jul 2001
Posts: 4,577
From: DeKalb, IL
Re: Will a 94 computer work in a 93.
I've posted this many times. The search button is an incredible feature.
here is is again:
here is is again:
Originally Posted by madwolf
To switch to a 94+ setup, if you have a manual, you will want a 94 M6 harness. They are hard to come by, but easiest for the swap.
94 A4 harness for an automatic. These are easier to find.
On the 94 harness, there are two wires that need to be swapped around for this to work. The wires are for fuel pump and serial data.
In addition to that, you will need to get heated o2 sensors and swap out the bottom plate of your throttle body with a 94+ one. Or you can cut the IAC connector off the 93 harness and swap it over to the 94 harness.
You will most likely need to convert to a 94-96 instrument cluster or just swap a 94-96 cluster circuit board into yours. (make sure if your cluster is 150mph, the 94-96 cluster is also 150mph if you're swapping boards only)
Some people say the 93 cluster will work, but I swapped mine anyway because I know a 94-96 cluster won't work on a 93. (93s have a tach filter in the harness so you normally have to remove it if swapping in a new cluster... or swap boards)
The swap will be harder with an automatic. You will either need a 4L60E, or you will need a different VSS. You might get it to work with some tuning, or it might even work without doing anything. I know the part numbers are different for the VSS between the 2 years.
To switch to a 94+ setup, if you have a manual, you will want a 94 M6 harness. They are hard to come by, but easiest for the swap.
94 A4 harness for an automatic. These are easier to find.
On the 94 harness, there are two wires that need to be swapped around for this to work. The wires are for fuel pump and serial data.
In addition to that, you will need to get heated o2 sensors and swap out the bottom plate of your throttle body with a 94+ one. Or you can cut the IAC connector off the 93 harness and swap it over to the 94 harness.
You will most likely need to convert to a 94-96 instrument cluster or just swap a 94-96 cluster circuit board into yours. (make sure if your cluster is 150mph, the 94-96 cluster is also 150mph if you're swapping boards only)
Some people say the 93 cluster will work, but I swapped mine anyway because I know a 94-96 cluster won't work on a 93. (93s have a tach filter in the harness so you normally have to remove it if swapping in a new cluster... or swap boards)
The swap will be harder with an automatic. You will either need a 4L60E, or you will need a different VSS. You might get it to work with some tuning, or it might even work without doing anything. I know the part numbers are different for the VSS between the 2 years.
Registered User
Joined: Feb 2002
Posts: 5,645
From: Bridgewater, MA
Re: Will a 94 computer work in a 93.
Originally Posted by madwolf
I've posted this many times. The search button is an incredible feature.
here is is again:
here is is again:
Registered User
Joined: Jun 2004
Posts: 953
From: S. Ontario, Canada
Re: Will a 94 computer work in a 93.
Originally Posted by RealQuick
...Why is there a def. file for a 93 on tunercats site? Is that just for a chip burning software? Thanks.
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