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Author
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Topic: ECM Swap
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fredfifty
Since
9/2010
Member # 10320
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posted
 
 
Does anybody know whats the procedure to swapping an ecm from an A9P to A9L? Im assuming i would disconnect the battery, but is there anything else to do or is it a straight remove and replace type deal? I will be changing the O2 harness to match the A9L. Thanks
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RIP EDSON VELORO
IM A NOOB, EXCUSE ME. THANKS.
92 LX Coupe 5.0 CARB'd BOLT-ONS SMOG LEGAL
62 Rag Impala
Posts: 4953 | Registered: Sep 2010
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Martinna
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Member # 12493
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posted
Straight swap. You can swap to a T5 O2 harness or repin the AOD harness to match a T5 O2 harness.
Posts: 1093 | From: City | Registered: Oct 2012
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fredfifty
Since
9/2010
Member # 10320
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posted
quote:
Originally posted by Martinna:
Straight swap. You can swap to a T5 O2 harness or repin the AOD harness to match a T5 O2 harness.
im not familiar on repinning it, i will just get the harness for a manual...thanks for the info
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RIP EDSON VELORO
IM A NOOB, EXCUSE ME. THANKS.
92 LX Coupe 5.0 CARB'd BOLT-ONS SMOG LEGAL
62 Rag Impala
Posts: 4953 | Registered: Sep 2010
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NEIGHT
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Member # 8741
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posted
It's in the passenger kick panel. You just need to pull off the kick panel, then I think there's two screws that are holding the plastic hold down and then there's one more to remove the ground. Pretty straight forward. Yes, always disconnect battery when messing with electrical.
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-Savage Habits-
1992 Summer Edition
1986 Hatch- catfish killer
1964 Impala hard top
Posts: 18548 | From: EA$T $IDE REDWOOD CITY | Registered: Nov 2008
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Martinna
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Member # 12493
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posted
quote:
Originally posted by fredfifty:
quote:
Originally posted by Martinna:
Straight swap. You can swap to a T5 O2 harness or repin the AOD harness to match a T5 O2 harness.
im not familiar on repinning it, i will just get the harness for a manual...thanks for the info
https://www.youtube.com/watch?v=l8eQfaeAwrQ
https://www.youtube.com/watch?v=7iGGDPD4A4k
http://forums.corral.net/forums/general-mustang-tech/1094179-oxygen-sensor-harnesses-manual-auto-differences-year-differences.html
"The problem is the difference in the harnesses and a mis match of the SIGRTN for the NGS for a T-5 and the NSS for the AOD. Start voltage is routed through the NSS in Auto setups and not in Manual setup. This is were the Frying happens, as the SIGRTN is a sourced ground and a 12 blast will fry it and cause holly hell in the ECM when a A9L is used in an Auto setup.
The O2 harness plugs into a 8 PIN black connector on the passenger side fenderwell. In that connector is a PIN for the NDS circuit, a PIN for Auto and a PIN for Manual. On the Auto 02 harness the NDS is connected to the Auto PIN and in Manual 02 harness the NDS PIN is connected to the Manul PIN."
[ 2017-12-11, 12:01 AM: Message edited by: Martinna ]
Posts: 1093 | From: City | Registered: Oct 2012
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fredfifty
Since
9/2010
Member # 10320
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posted
quote:
Originally posted by Martinna:
quote:
Originally posted by fredfifty:
quote:
Originally posted by Martinna:
Straight swap. You can swap to a T5 O2 harness or repin the AOD harness to match a T5 O2 harness.
im not familiar on repinning it, i will just get the harness for a manual...thanks for the info
https://www.youtube.com/watch?v=l8eQfaeAwrQ
https://www.youtube.com/watch?v=7iGGDPD4A4k
http://forums.corral.net/forums/general-mustang-tech/1094179-oxygen-sensor-harnesses-manual-auto-differences-year-differences.html
"The problem is the difference in the harnesses and a mis match of the SIGRTN for the NGS for a T-5 and the NSS for the AOD. Start voltage is routed through the NSS in Auto setups and not in Manual setup. This is were the Frying happens, as the SIGRTN is a sourced ground and a 12 blast will fry it and cause holly hell in the ECM when a A9L is used in an Auto setup.
The O2 harness plugs into a 8 PIN black connector on the passenger side fenderwell. In that connector is a PIN for the NDS circuit, a PIN for Auto and a PIN for Manual. On the Auto 02 harness the NDS is connected to the Auto PIN and in Manual 02 harness the NDS PIN is connected to the Manul PIN."
<img src="http://www.veryuseful.com/mustang/tech/engine/images/mustangO2Harness.gif" style="max-width: 640px" alt=" - " />
thanks for the videos, those really helped! I don't know why I couldn't find those...I will have to check again where my manual o2 harness is pinned at. I think it may be at 1 and 5. I will need to check again. in the first video he recommended for 91-93 to be pinned at 1 and 6. so if im pinned at 1 and 5 currently, could that cause my car to run really rich and let off white smoke? thanks for the links martinna
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RIP EDSON VELORO
IM A NOOB, EXCUSE ME. THANKS.
92 LX Coupe 5.0 CARB'd BOLT-ONS SMOG LEGAL
62 Rag Impala
Posts: 4953 | Registered: Sep 2010
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MUSTTANGUY
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Member # 2251
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posted
Go to PonyPerformance.com
In technical section you will find o2 harness identification, this will make it clear as to jumper wire position for auto/manual
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Tim (Musttanguy)
97 5.0 coupe
82 GT 427/T56/9"
Posts: 1690 | From: Lodi | Registered: Dec 2002
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fredfifty
Since
9/2010
Member # 10320
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posted
quote:
Originally posted by MUSTTANGUY:
Go to PonyPerformance.com
In technical section you will find o2 harness identification, this will make it clear as to jumper wire position for auto/manual
Thats another great site, thanks bro!
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RIP EDSON VELORO
IM A NOOB, EXCUSE ME. THANKS.
92 LX Coupe 5.0 CARB'd BOLT-ONS SMOG LEGAL
62 Rag Impala
Posts: 4953 | Registered: Sep 2010
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fredfifty
Since
9/2010
Member # 10320
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posted
my 92 (before i put in the seemingly correct o2 harness) originally had the harness with the purple/yellow looped jumper wire, which according to the pony performance site is for an 88-90 aod. i pulled that and put in the o2 harness with the light blue/yellow looped jumper wire which is for a 91-93 manual. looks like im good there
Posts: 4953 | Registered: Sep 2010
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MUSTTANGUY
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Member # 2251
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posted
quote:
Originally posted by Martinna:
MUSTTANGUY is a good guy and really knows his Mustangs. You're in good shape listening to him------ http://www.ponyperformance.com/tech14.html
Thanks, I've worked on/parted/built/customized these cars for about 30 years now so I have learned a few things along the way and don't mind passing my knowledge along.
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Tim (Musttanguy)
97 5.0 coupe
82 GT 427/T56/9"
Posts: 1690 | From: Lodi | Registered: Dec 2002
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fredfifty
Since
9/2010
Member # 10320
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posted
i was mistaken, the looped jumper wire that is purple/yellow that i had in the car originally, was for a 88-90 T5, i was mixed up about it for some reason....so maybe i can use the old harness.
this is the original harness that was used with the A9P
this is the harness i am currently using with the A9L
[ 2017-12-14, 02:19 PM: Message edited by: fredfifty ]
Posts: 4953 | Registered: Sep 2010
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MUSTTANGUY
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Member # 2251
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posted
both are T5 configured,
purple/yellow 88-90
blue/yellow 91-93
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Tim (Musttanguy)
97 5.0 coupe
82 GT 427/T56/9"
Posts: 1690 | From: Lodi | Registered: Dec 2002
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