computer
Melting Slicks
Joined: Jan 2009
Posts: 3,181
Likes: 286
From: Puyallup Washington
If you mean the one in the engine compartment it is near the firewall on the drivers side. If you mean the radio ECM it is generally located behind the passenger seat in the storage compartment.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
Just to ask, what kind of problem are you having?
Also in the 94 (&95-96), the engine control computer terminology is called a PCM (Powertrain control module). Does the same thing basically but a very different part.
And just to keep things straight, the tuner module for the radio is called the CDM (behind the seat).
Also in the 94 (&95-96), the engine control computer terminology is called a PCM (Powertrain control module). Does the same thing basically but a very different part.
And just to keep things straight, the tuner module for the radio is called the CDM (behind the seat).
Race Director
Joined: Oct 2005
Posts: 11,770
Likes: 175
From: Rolla Missouri
2021 C4 of the Year - Unmodified Finalist
St. Jude Donor '10 thru '25
Anybody selling you a "chip" for that year is selling you some "snake oil" resister that only tricks the car into running slightly richer.
You will not see any performance gains.
Your '94 computer can be "tuned" with a programmer, although even that will need some engine mods to realize any performance gains.
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Burning Brakes
Joined: Apr 2009
Posts: 1,228
Likes: 10
From: That one city...you know that one. Idaho
Jet does not actually sell a chip (prom) for a 1994. They do have a handheld programmer, and a "module" that connects inline with one of the PCM connectors.
None of those is a substitute for a good tune, and there is not much point to get a tune for a mostly stock engine.
One of the problems here is that "CHIP" in many places is the term used for tune, handheld programmer, prom, and more.
None of those is a substitute for a good tune, and there is not much point to get a tune for a mostly stock engine.
One of the problems here is that "CHIP" in many places is the term used for tune, handheld programmer, prom, and more.
Safety Car
Joined: Jun 2003
Posts: 4,250
Likes: 656
From: San Diego Ca
+2. The 94 uses a reprogrammable eeprom that is on the PCMs board. It can be erased and reprogrammed by Tuner Cat and LT1 Edit and other tuning software.
The chips stopped in 1993 and were actual 27C256 eproms (available sometimes at Fry's) that needed to be erased by strong UV light and then reprogrammed with a chip burner. That the newly burned chip would be placed in a CalPack that would then slip in the PCM a bit like memory does in a computer.
This is a calpack. The 27c256 chip is inside it.
The chips stopped in 1993 and were actual 27C256 eproms (available sometimes at Fry's) that needed to be erased by strong UV light and then reprogrammed with a chip burner. That the newly burned chip would be placed in a CalPack that would then slip in the PCM a bit like memory does in a computer.
This is a calpack. The 27c256 chip is inside it.
Thread Starter
Instructor
Joined: Apr 2011
Posts: 129
Likes: 1
From: Hanover PA
From what I understand the new module is placed just before the "computer", under the hood by the drivers side fender well, then the wiring harness plugs in the module.The new module requires modified exhaust,air intake, 91 octane fuel & 180 thermostat. Reportedly 20 hp increase.
Safety Car
Joined: Jun 2003
Posts: 4,250
Likes: 656
From: San Diego Ca
Yes, these simply fool the computer by slightly changing a few of the sensor values.
I put an early Hypertech chip's .bin file in a file comparator and found 8 bits of information different than stock. Now that is on a 256,000 bit (or is it byte) chip that holds a file that is actually 4096 bits long. Not much of a change is why most of us don't think a lot of the changes.
I put an early Hypertech chip's .bin file in a file comparator and found 8 bits of information different than stock. Now that is on a 256,000 bit (or is it byte) chip that holds a file that is actually 4096 bits long. Not much of a change is why most of us don't think a lot of the changes.
Race Director
Joined: Oct 2005
Posts: 11,770
Likes: 175
From: Rolla Missouri
2021 C4 of the Year - Unmodified Finalist
St. Jude Donor '10 thru '25
From what I understand the new module is placed just before the "computer", under the hood by the drivers side fender well, then the wiring harness plugs in the module.The new module requires modified exhaust,air intake, 91 octane fuel & 180 thermostat. Reportedly 20 hp increase.
You'll be lucky if you don't lose 5 HP with one of those "resistors"
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
Why didn't you ask on here before purchasing something like this... These guys could of saved you some money....Can you cancel the order??
I would much rather get ribbed by these guys for asking about getting something like this , then actually getting it, and be stuck with a piece of crap that doesn't work......WW
I would much rather get ribbed by these guys for asking about getting something like this , then actually getting it, and be stuck with a piece of crap that doesn't work....
..WW
Burning Brakes
Joined: Apr 2009
Posts: 1,228
Likes: 10
From: That one city...you know that one. Idaho
The chips stopped in 1993 and were actual 27C256 eproms (available sometimes at Fry's) that needed to be erased by strong UV light and then reprogrammed with a chip burner. That the newly burned chip would be placed in a CalPack that would then slip in the PCM a bit like memory does in a computer.
Thread Starter
Instructor
Joined: Apr 2011
Posts: 129
Likes: 1
From: Hanover PA
I certainly don't want to dispute your collective wisdom on this forum but for $188, I am going to try it. I just find it hard to believe that a reputable company like Jet could stay in business if their chips & modules didn't at least do some of what they claim they will do.You know the old saying from P T Barnum, "There's a sucker born every day" or was it,"A fool and his money soon part." Both may be appropriate in my case.
Thanks for the advice, I will let you know how this works out.
Thanks for the advice, I will let you know how this works out.