993 Re chip
Track Day
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From: HNL
RL Technical Advisor
Joined: May 2001
Posts: 11,870
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From: Portland Oregon
Used ones will need to either have it disabled, or reprogrammed to your car using a Hammer or PST-2. This is a dealer-only operation since the replacement codes must come from PCNA.
Rennlist Member
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Yep, no more immobilizer and the car functions now like any other car with an alarm and remote entry. I've got no light on in the dash either. Steve sent me a new relay to swap with the one already in the car, I'm assuming the relay helps make it all work? Is that right Steve?
RL Technical Advisor
Joined: May 2001
Posts: 11,870
Likes: 75
From: Portland Oregon
Yep, no more immobilizer and the car functions now like any other car with an alarm and remote entry. I've got no light on in the dash either. Steve sent me a new relay to swap with the one already in the car, I'm assuming the relay helps make it all work? Is that right Steve?
Banned
Joined: Feb 2004
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From: SF Bay Area
This depends on whether you have a used .376 ECU or a new one with Immobilizer. New ones w/o the Immobilizer are no longer available.
Used ones will need to either have it disabled, or reprogrammed to your car using a Hammer or PST-2. This is a dealer-only operation since the replacement codes must come from PCNA.
Used ones will need to either have it disabled, or reprogrammed to your car using a Hammer or PST-2. This is a dealer-only operation since the replacement codes must come from PCNA.
Thanks
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RL Technical Advisor
Joined: May 2001
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From: Portland Oregon
Unless someone has disabled the Immobilizer in the donor ECU or you also bought the Immobilizer ECU from that donor car so both units can communicate, its not going to start another 993; after all,....this was the express purpose of this system. Its an anti-theft unit and works very well at that. Remember, these types of systems were Federally mandated from the DOT starting in 1996!
The whole idea in the first place was preventing a potential thief from purchasing a new or used ECU and just plugging that into a car to drive it away.
My personal test ECU unit will do just that, however I've disabled the Immobilizer just for this express purpose.New of used ones need to either have your Immobilizer codes programmed into the replacement or disable it in software.
Now,...I am unable to tell you why others have had used ones start their cars aside from the above. I would need to remove the chip & read it in order to tell if the Immobilizer was still active or not. In short, need more detailed data.
Race Car
Joined: May 2003
Posts: 4,229
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From: SoCal
Some variables here,....
Unless someone has disabled the Immobilizer in the donor ECU or you also bought the Immobilizer ECU from that donor car so both units can communicate, its not going to start another 993; after all,....this was the express purpose of this system. Its an anti-theft unit and works very well at that. Remember, these types of systems were Federally mandated from the DOT starting in 1996!
The whole idea in the first place was preventing a potential thief from purchasing a new or used ECU and just plugging that into a car to drive it away. My personal test ECU unit will do just that, however I've disabled the Immobilizer just for this express purpose.
New of used ones need to either have your Immobilizer codes programmed into the replacement or disable it in software.
Now,...I am unable to tell you why others have had used ones start their cars aside from the above. I would need to remove the chip & read it in order to tell if the Immobilizer was still active or not. In short, need more detailed data.
Unless someone has disabled the Immobilizer in the donor ECU or you also bought the Immobilizer ECU from that donor car so both units can communicate, its not going to start another 993; after all,....this was the express purpose of this system. Its an anti-theft unit and works very well at that. Remember, these types of systems were Federally mandated from the DOT starting in 1996!
The whole idea in the first place was preventing a potential thief from purchasing a new or used ECU and just plugging that into a car to drive it away.
My personal test ECU unit will do just that, however I've disabled the Immobilizer just for this express purpose.New of used ones need to either have your Immobilizer codes programmed into the replacement or disable it in software.
Now,...I am unable to tell you why others have had used ones start their cars aside from the above. I would need to remove the chip & read it in order to tell if the Immobilizer was still active or not. In short, need more detailed data.
All unmodified OEM '96-'98 993 DME ECMs function with any OEM Porsche
993 immobilizer and its key fobs. There's no recoding required when
switching the DME ECM from one car to another. This may not be true
when the DME ECM gets re-flashed for the so-called 'performance tuning'.
"My experience is that a used ECU can be swapped into another car without reprogramming.
It seems another poster in this thread has had a similar experience."
JM993 stated it correctly!
- LexVan -
"Don't waste your money. If you want a faster 993 sell it and get the turbo."
One of the few wise ones.
Rennlist Member
Joined: Apr 2012
Posts: 1,031
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More mis-information again posted on Rennlist.
All unmodified OEM '96-'98 993 DME ECMs function with any OEM Porsche
993 immobilizer and its key fobs. There's no recoding required when
switching the DME ECM from one car to another. This may not be true
when the DME ECM gets re-flashed for the so-called 'performance tuning'.
"My experience is that a used ECU can be swapped into another car without reprogramming.
It seems another poster in this thread has had a similar experience."
JM993 stated it correctly!
- LexVan -
"Don't waste your money. If you want a faster 993 sell it and get the turbo."
One of the few wise ones.
All unmodified OEM '96-'98 993 DME ECMs function with any OEM Porsche
993 immobilizer and its key fobs. There's no recoding required when
switching the DME ECM from one car to another. This may not be true
when the DME ECM gets re-flashed for the so-called 'performance tuning'.
"My experience is that a used ECU can be swapped into another car without reprogramming.
It seems another poster in this thread has had a similar experience."
JM993 stated it correctly!
- LexVan -
"Don't waste your money. If you want a faster 993 sell it and get the turbo."
One of the few wise ones.
Banned
Joined: Oct 2011
Posts: 5,464
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From: Oregon
Seems abundantly clear to me Loren was talking about the interchangability of ECU's, and not the performance gains of your specific car...Easy there, tiger
Unless someone has disabled the Immobilizer in the donor ECU or you also bought the Immobilizer ECU from that donor car so both units can communicate, its not going to start another 993
What does the immobilizer bypass relay do? Turn off the dash light?
Last edited by nine9six; Oct 12, 2014 at 01:14 PM.
Rennlist Member
Joined: Apr 2012
Posts: 1,031
Likes: 10
If you read Loren's thread a little closer there tiger, and others when it comes to discussing ECU upgrades for the NA cars, you'll find similar comments from him doubting the performance/viability gains that this upgrade can offer. He doesn't seem to acknowledge there is actual experience of those who have actually done the upgrade and can offer pre- and post-upgrade perspective on how the car performs, like myself. I was simply pointing that out.